Log in

Relevant bibliographies by topics / Hot Big Bang cosmology

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Academic literature on the topic 'Hot Big Bang cosmology'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Hot Big Bang cosmology.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Hot Big Bang cosmology"

1

Kragh, Helge. "Naming the Big Bang." Historical Studies in the Natural Sciences 44, no. 1 (November 2012): 3–36. http://dx.doi.org/10.1525/hsns.2014.44.1.3.

Full text

Abstract:

The standard model of modern cosmology is known as the hot big bang, a name that refers to the initial state of the universe some fourteen billion years ago. The name Big Bang introduced by Fred Hoyle in 1949 is one of the most successful scientific neologisms ever. How did the name originate and how was it received by physicists and astronomers in the period leading up to the hot big bang consensus model in the late 1960s? How did it reflect the meanings of the origin of the universe, a concept that predates the name by nearly two decades? Contrary to what is often assumed, the name was not an instant success—it took more than twenty years before Big Bang became a household word in the scientific community. When it happened, it was used with different connotations, as is still the case. Moreover, it was used earlier and more frequently in popular than in scientific contexts, and not always relating to cosmology. It turns out that Hoyle’s celebrated name has a richer and more surprising history than commonly assumed and also that the literature on modern cosmology and its history includes many common mistakes and errors. An etymological approach centering on the name Big Bang provides supplementary insight to the historical understanding of the emergence of modern cosmology.

APA, Harvard, Vancouver, ISO, and other styles

2

Turner, Michael S. "The Hot Big Bang and Beyond." Symposium - International Astronomical Union 168 (1996): 301–20. http://dx.doi.org/10.1017/s0074180900110186.

Full text

Abstract:

The hot big-bang cosmology provides a reliable accounting of the Universe from about 10−2sec after the bang until the present, as well as a robust framework for speculating back to times as early as 10−43sec. Cosmology faces a number of important challenges; foremost among them are determining the quantity and composition of matter in the Universe and developing a detailed and coherent picture of how structure (galaxies, clusters of galaxies, superclusters, voids, great walls, and so on) developed. At present there is a working hypothesis—cold dark matter—which is based upon inflation and which, if correct, would extend the big bang model back to 10−32sec and cast important light on the unification of the forces. Many experiments and observations, from CBR anisotropy experiments to Hubble Space Telescope observations to experiments at Fermilab and CERN, are now putting the cold dark matter theory to the test. At present it appears that the theory is viable only if the Hubble constant is smaller than current measurements indicate (around 30 km s−1Mpc−1), or if the theory is modified slightly, e.g., by the addition of a cosmological constant, a small admixture of hot dark matter (5 eV “worth of neutrinos”), more relativistic particles, or a tilted spectrum of density perturbations.

APA, Harvard, Vancouver, ISO, and other styles

3

Rees, Martin J. "Cosmology: evidence for a ‘big bang’." European Review 2, no. 2 (April 1994): 155–64. http://dx.doi.org/10.1017/s1062798700001022.

Full text

Abstract:

During the last 25 years, evidence has accumulated that our universe has evolved, over a period of 10–15 billion years, from a hot dense fireball to its present state. Telescopes can detect objects so far away that the universe had only a tenth its present age when the light we now receive set out towards us. The cosmic background radiation, and the abundances of elements such as helium and lithium, permit quantitative inferences about what the universe was like when it had been expanding for only a few seconds. The laws of physics established in the laboratory apparently suffice for interpreting all astronomical phenomena back to that time. In the initial instants of cosmic expansion, however, the particle energies and densities were so extreme that terrestrial experiments offer no firm guidance. We will not understand why the universe contains the observed ‘mix’ of matter and radiation, nor why it is expanding in the observed fashion, without further progress in fundamental physics.

APA, Harvard, Vancouver, ISO, and other styles

4

Peebles, P. J. E., D. N. Schramm, E. L. Turner, and R. G. Kron. "The case for the relativistic hot Big Bang cosmology." Nature 352, no. 6338 (August 1991): 769–76. http://dx.doi.org/10.1038/352769a0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

KANDRUP, HENRY E., and PAWEL O. MAZUR. "GENERATING A HOT BIG BANG VIA A CHANGE IN TOPOLOGY." Modern Physics Letters A 05, no. 19 (August 10, 1990): 1471–76. http://dx.doi.org/10.1142/s0217732390001670.

Full text

Abstract:

This letter uses ideas developed recently in semiclassical quantum gravity to argue that many qualitative features of the Hot Big Bang generally assumed in cosmology may be explained by the hypothesis that, interpreted semiclassically, the Universe “tunnelled into being” via a quantum fluctuation from a small (Planck-sized), topologically complex entity to a topolo-gically trivial entity (like a Friedmann Universe) that rapidly grew to a more macroscopic size.

APA, Harvard, Vancouver, ISO, and other styles

6

Shaposhnikov, Mikhail. "The Higgs boson and cosmology." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373, no. 2032 (January 13, 2015): 20140038. http://dx.doi.org/10.1098/rsta.2014.0038.

Full text

Abstract:

I will discuss how the Higgs field of the Standard Model may have played an important role in cosmology, leading to the homogeneity, isotropy and flatness of the Universe; producing the quantum fluctuations that seed structure formation; triggering the radiation-dominated era of the hot Big Bang; and contributing to the processes of baryogenesis and dark matter production.

APA, Harvard, Vancouver, ISO, and other styles

7

Narlikar, Jayant V. "Alternative Cosmologies." Symposium - International Astronomical Union 124 (1987): 447–59. http://dx.doi.org/10.1017/s0074180900159418.

Full text

Abstract:

This review highlights some of the cosmological theories proposed as alternatives to the standard hot big bang model. Specific ideas discussed here are the matter - antimatter symmetric cosmologies, the empirical two-component model, the G-varying cosmologies, the chronometric cosmology and a simplified quantum cosmology. It is argued that many alternative cosmologies have contributed useful concepts and offered observational tests that have enriched the field of cosmology as a science.

APA, Harvard, Vancouver, ISO, and other styles

8

Traunmüller, Hartmut. "Does standard cosmology really predict the cosmic microwave background?" F1000Research 9 (September 28, 2020): 261. http://dx.doi.org/10.12688/f1000research.22432.4.

Full text

Abstract:

In standard Big Bang cosmology, the universe expanded from a very dense, hot and opaque initial state. The light that was last scattered about 380,000 years later, when the universe had become transparent, has been redshifted and is now seen as thermal radiation with a temperature of 2.7 K, the cosmic microwave background (CMB). However, since light escapes faster than matter can move, it is prudent to ask how we, made of matter from this very source, can still see the light. In order for this to be possible, the light must take a return path of the right length. A curved return path is possible in spatially closed, balloon-like models, but in standard cosmology, the universe is “flat” rather than balloon-like, and it lacks a boundary surface that might function as a reflector. Under these premises, radiation that once filled the universe homogeneously cannot do so permanently after expansion, and we cannot see the last scattering event. It is shown that the traditional calculation of the CMB temperature is inappropriate and that light emitted by any source inside the Big Bang universe earlier than half its “conformal age” can only become visible to us via a return path. Although often advanced as the best evidence for a hot Big Bang, the CMB actually tells against a formerly smaller universe and so do also distant galaxies.

APA, Harvard, Vancouver, ISO, and other styles

9

Traunmüller, Hartmut. "Does standard cosmology really predict the cosmic microwave background?" F1000Research 9 (February 19, 2021): 261. http://dx.doi.org/10.12688/f1000research.22432.5.

Full text

Abstract:

In standard Big Bang cosmology, the universe expanded from a very dense, hot and opaque initial state. The light that was last scattered about 380,000 years later, when the universe had become transparent, has been redshifted and is now seen as thermal radiation with a temperature of 2.7 K, the cosmic microwave background (CMB). However, since light escapes faster than matter can move, it is prudent to ask how we, made of matter from this very source, can still see the light. In order for this to be possible, the light must take a return path of the right length. A curved return path is possible in spatially closed, balloon-like models, but in standard cosmology, the universe is “flat” rather than balloon-like, and it lacks a boundary surface that might function as a reflector. Under these premises, radiation that once filled the universe homogeneously cannot do so permanently after expansion, and we cannot see the last scattering event. It is shown that the traditional calculation of the CMB temperature is inappropriate and that light emitted by any source inside the Big Bang universe earlier than half its “conformal age” can only become visible to us via a return path. Although often advanced as the best evidence for a hot Big Bang, the CMB actually tells against a formerly smaller universe and so do also distant galaxies.

APA, Harvard, Vancouver, ISO, and other styles

10

Traunmüller, Hartmut. "Does standard cosmology really predict the cosmic microwave background?" F1000Research 9 (September 23, 2021): 261. http://dx.doi.org/10.12688/f1000research.22432.6.

Full text

Abstract:

In standard Big Bang cosmology, the universe expanded from a very dense, hot and opaque initial state. The light that was last scattered about 380,000 years later, when the universe had become transparent, has been redshifted and is now seen as thermal radiation with a temperature of 2.7 K, the cosmic microwave background (CMB). However, since light escapes faster than matter can move, it is prudent to ask how we, made of matter from this very source, can still see the light. In order for this to be possible, the light must take a return path of the right length. A curved return path is possible in spatially closed, balloon-like models, but in standard cosmology, the universe is “flat” rather than balloon-like, and it lacks a boundary surface that might function as a reflector. Under these premises, radiation that once filled the universe homogeneously cannot do so permanently after expansion, and we cannot see the last scattering event. It is shown that the traditional calculation of the CMB temperature is inappropriate and that light emitted by any source inside the Big Bang universe earlier than half its “conformal age” can only become visible to us via a return path. Although often advanced as the best evidence for a hot Big Bang, the CMB actually tells against a formerly smaller universe and so do also distant galaxies.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Hot Big Bang cosmology"

1

Croft, Rupert Alfred Charles. "Galaxy clusters and the formation of large-scale structures in the universe." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308751.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Bridgman, Helen Amanda. "Classical and quantum fluctuations in superstring cosmology." Thesis, University of Portsmouth, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247490.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Hatton, Stephen John. "Probing the large-scale structure of the Universe with future galaxy redshift surveys." Thesis, Durham University, 1999. http://etheses.dur.ac.uk/4494/.

Full text

Abstract:

Several projects are currently underway to obtain large galaxy redshift surveys over the course of the next decade. The aim of this thesis is to study how well the resultant three-dimensional maps of the galaxy distribution will be able to constrain the various parameters of the standard Big Bang cosmology. The work is driven by the need to deal with data of far better quality than has previously been available. Systematic biases in the treatment of existing datasets have been dwarfed by random errors due to the small size of the sample, but this will not be the case with the wealth of data that will shortly become available. We employ a set of high-resolution /V-body simulations spanning a range of cosmologies and galaxy biasing schemes. We use the power spectrum of the galaxy density field, measured using the fast Fourier transform process, to develop models and statistics for extracting cosmological information. In particular, we examine the distortion of the power spectrum by galaxy peculiar velocities when measurements are made in redshift space. Mock galaxy catalogues are drawn from these simulations, mimicking the geometries and selection functions of the large surveys we wish to model. Applying the same models to the mock catalogues is not a trivial task, as geometrical effects distort the power spectrum, and measurement errors are determined by the survey volume. We develop methods for assessing these effects and present an in-depth analysis of the likely confidence intervals we will obtain from the surveys on the parameters that determine the power spectrum. Real galaxy catalogues are prone to additional biases that must be assessed and removed. One of these is the effect of extinction by dust in the Milky Way, which imprints its own angular clustering signal on the measured power spectrum. We investigate the strength of this effect for the SDSS survey.

APA, Harvard, Vancouver, ISO, and other styles

4

Manoel, João Paulo Pitelli 1982. "Singularidades quânticas." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/306262.

Full text

Abstract:

Orientador: Patricio Anibal Letelier Sotomayor
Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Matemática, Estatística e Computação Científica
Made available in DSpace on 2018-08-18T20:03:53Z (GMT). No. of bitstreams: 1 Manoel_JoaoPauloPitelli_D.pdf: 2670867 bytes, checksum: 990119329fe5abbf22d8a42384ff3e72 (MD5) Previous issue date: 2011
Resumo: Espaços-tempo classicamente singulares serão estudados de um ponto de vista quântico. A utilização da mecânica quântica será feita de duas maneiras. A primeira consiste em encontrar a função de onda do Universo, resolvendo a equação de Wheeler-DeWitt para as variáveis canônicas do espaço-tempo. A segunda consiste em acoplar conformemente campos escalares e spinoriais ao campo gravitacional, estudando o comportamento de pacotes de ondas neste espaço-tempo curvo
Abstract: Classically singular spacetimes will be studied from a quantum mechanical point of view. The use of quantum mechanics will be handled in two different ways. The first consists in finding the wave function of the universe by solving the Wheeler-DeWitt equation for the canonical variables of spacetime. The second is through the conformal coupling of scalar and spinorial fields with the gravitational field, where we will study the behavior of wave packets in this curved spacetime
Doutorado
Matematica Aplicada
Doutor em Matemática Aplicada

APA, Harvard, Vancouver, ISO, and other styles

5

Oh, Jae-Hyuk. "GAUGE-GRAVITY DUALITY AND ITS APPLICATIONS TO COSMOLOGY AND FLUID DYNAMICS." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/178.

Full text

Abstract:

This thesis is devoted to the study of two important applications of gauge-gravity duality: the cosmological singularity problem and conformal fluid dynamics. Gauge-gravity duality is a concrete dual relationship between a gauge theory (such as electromagnetism, the theories of weak and strong interactions), and a theory of strings which contains gravity. The most concrete application of this duality is the AdS/CFT correspondence, where the theory containing gravity lives in the bulk of an asymptotically anti-de-Sitter space-time, while the dual gauge theory is a deformation of a conformal field theory which lives on the boundary of anti-de-Sitter space-time(AdS). Our first application of gauge-gravity duality is to the cosmological singularity problem in string gravity. A cosmological singularity is defined as a spacelike region of space-time which is highly curved so that Einstein’s gravity theory can be no longer applied. In our setup the bulk space-time has low curvature in the far past and the physics is well described by supergravity (which is an extension of standard Einstein gravity). The cosmological singularity is driven by a time dependent string coupling in the bulk theory. The rate of change of the coupling is slow, but the net change of the coupling can be large. The dual description of this is a time dependent coupling of the boundary gauge theory. The coupling has a profile which is a constant in the far past and future and attains a small but finite value at intermediate times. We construct the supergravity solution, with the initial condition that the bulk space-time is pure AdS in the far past and show that the solution remains smooth in a derivative expansion without formation of black holes. However when the intermediate value of the string coupling becomes weak enough, space-time becomes highly curved and the supergravity approximation breaks down, mimicking a spacelike singularity. The resulting dynamics is analyzed in the dual gauge theory with a time dependent coupling constant which varies slowly. We develop an appropriate adiabatic expansion in the gauge theory in terms of coherent states and show that the time evolution continues to be smooth. We cannot, however, arrive at a definitive conclusion about the fate of the system at very late times when the coupling has again risen and supergravity again applies. One possibility is that the energy which has been supplied to the universe is simply extracted out and the space-time goes back to its initial state. This could provide a model for a bouncing cosmology. A second possibility is that dissipation leads to a thermal state at late time. If this possibility holds, we show that such a thermal state will be described either by a gas of strings or by a small black hole, but not by a big black hole. This means that in either case, the future space-time is close to AdS. We then apply gauge-gravity duality to conformal fluid dynamics. The long wavelength behavior of any strongly coupled system with a finite mean free path is described by an appropriate fluid dynamics. The bulk dual of a fluid flow in the boundary theory is a black hole with a slowly varying horizon. In this work we consider certain fluid flows which become supersonic in some regions. It is well known that such flows present acoustic analogs of ergoregions and horizons, where acoustic waves cannot propagate in certain directions. Such acoustic horizons are expected to exhibit thermal radiation of acoustic waves with temperature essentially given by the gradient of the velocity at the acoustic horizon. We find acoustic analogs of black holes in charged conformal fluids and use gauge-gravity duality to construct dual gravity solutions. A certain class of gravitational quasinormal wave modes around these gravitational backgrounds perceives a horizon. Upon quantization, this implies that these gravitational modes should have a thermal spectrum. The final issue that we study is fluid-gravity duality at zero temperature. The usual way of constructing gravity duals of fluid flows is by means of a small derivative expansion, in which the derivatives are much smaller than the temperature of the background black hole. Recently, it has been reported that for charged fluids, this procedure breaks down in the zero temperature limit. More precisely, corrections to the small derivative expansion in the dual gravity of charged fluid at zero temperature have singularities at the black hole horizon. In this case, fluid-gravity duality is not understood precisely. We explore this problem for a zero temperature charged fluid driven by a low frequency, small amplitude and spatially homogeneous external force. In the gravity dual, this force corresponds to a time dependent boundary value of the dilaton field. We calculate the bulk solution for the dilaton and the leading backreaction using a modified low frequency expansion. The resulting solutions are regular everywhere, establishing fluid-gravity duality to this order.

APA, Harvard, Vancouver, ISO, and other styles

6

Vanneste, Sylvain. "Constraints on primordial gravitational waves from the large scales CMB data." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS314/document.

Full text

Abstract:

Cette thèse s’articule autour du développement d'outils d’analyse des modes B du fond diffus cosmologique (CMB) dans le but d'estimer l’amplitude des ondes gravitationnelles primordiales produites durant la période inflationnaire.Nous nous intéressons plus précisément aux grandes échelles angulaires, pour lesquelles le signal attendu des modes B primordiaux est dominant. Ces échelles étant particulièrement contaminées par des émissions polarisées galactiques, nous avons étudié et développé des méthodes permettant de réduire ces contaminations et de caractériser les résidus. Ces outils peuvent être utilisés pour analyser les données des satellites tels que Planck ou LiteBIRD. Afin de quantifier l’amplitude des modes B, nous avons développé et caractérisé un estimateur de spectre en puissance des anisotropies du CMB. Celui-ci s’exécute dans l'espace des pixels et permet de croiser des cartes mesurées par différent détecteurs. La méthode est optimale, et minimise les fuites de variance des modes E vers les modes B.Nous avons appliqué les méthodes de nettoyage et d’estimation de spectre aux cartes de données et de simulations en polarisation fournies publiquement par Planck. Nos contraintes sur la comportement spectral de la poussière et du rayonnement synchrotron galactique sont en accord avec les analyses précédentes. Enfin, nous avons pu déduire une limite supérieure sur l’amplitude des ondes gravitationnelles primordiales
This thesis focuses on the development of analysis tools of the primordial B modes of the Cosmic Microwave Background (CMB). Our goal is to extract the amplitude of the primordial gravitational waves produced during the inflationary period.Specifically, we are interested in the large angular scales, for which the primary B modes signal is expected to be dominant. Since these scales are particularly contaminated by polarised galactic emissions, we have studied and developed approaches to reduce those contaminations and to characterise their residuals. Those methods are applicable to satellite missions such as Planck or LiteBIRD.In order to estimate the B modes amplitude, we developed and characterised a CMB anisotropies power spectrum estimator. The algorithm is pixels-based and allows to cross-correlate maps measured by different detectors. The method is optimal and minimises the E-to-B variance leakage.We applied the cleaning and spectrum estimation approaches to the polarisation data and simulation maps publicly provided by Planck. The constraints that we deduce are in agreement with past analysis. Ultimately, we derive an upper limit on the primordial gravitational waves amplitude

APA, Harvard, Vancouver, ISO, and other styles

7

Radermacher, Katharina Maria. "Strong Cosmic Censorship and Cosmic No-Hair in spacetimes with symmetries." Doctoral thesis, KTH, Matematik (Avd.), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-220400.

Full text

Abstract:

This thesis consists of three articles investigating the asymptotic behaviour of cosmological spacetimes with symmetries arising in Mathematical General Relativity. In Paper A and B, we consider spacetimes with Bianchi symmetry and where the matter model is that of a perfect fluid. We investigate the behaviour of such spacetimes close to the initial singularity ('Big Bang'). In Paper A, we prove that the Strong Cosmic Censorship conjecture holds in non-exceptional Bianchi class B spacetimes. Using expansion-normalised variables, we further show detailed asymptotic estimates. In Paper B, we prove similar estimates in the case of stiff fluids. In Paper C, we consider T2-symmetric spacetimes satisfying the Einstein equations for a non-linear scalar field. To given initial data, we show global existence and uniqueness of solutions to the corresponding differential equations for all future times. In the special case of a constant potential, a setting which is equivalent to a linear scalar field on a background with a positive cosmological constant, we investigate in detail the asymptotic behaviour towards the future. We prove that the Cosmic No-Hair conjecture holds for solutions satisfying an additional a priori estimate, an estimate which we show to hold in T3-Gowdy symmetry.
Denna avhandling består av tre artiklar som undersöker det asymptotiska beteendet hos kosmologiska rumstider med symmetrier som uppstår i Matematisk Allmän Relativitetsteori. I Artikel A och B studerar vi rumstider med Bianchi symmetri och där materiemodellen är en ideal fluid. Vi undersöker beteendet av sådana rumstider nära ursprungssingulariteten ('Big Bang'). I Artikel A bevisar vi att den Starka Kosmiska Censur-förmodan håller för icke-exceptionella Bianchi klass B-rumstider. Med hjälp av expansions-normaliserade variabler visar vi detaljerade asymptotiska uppskattningar. I Artikel B visar vi liknande uppskattningar för stela fluider. I Artikel C betraktar vi T2-symmetriska rumstider som uppfyller Einsteins ekvationer för ett icke-linjärt skalärfält. För givna begynnelsedata visar vi global existens och entydighet av lösningar till motsvarande differentialekvationer för all framtid. I det speciella fallet med en konstant potential, en situation som motsvarar ett linjärt skalärfält på en bakgrund med en positiv kosmologisk konstant, undersöker vi i detalj det asymptotiska beteendet mot framtiden. Vi visar att den Kosmiska Inget-Hår-förmodan håller för lösningar som uppfyller en ytterligare a priori uppskattning, en uppskattning som vi visar gäller i T3-Gowdy-symmetri.

QC 20171220

APA, Harvard, Vancouver, ISO, and other styles

8

Bailly, Sean. "Le gravitino, candidat à la matière noire et les implications en nucléosynthèse primordiale." Phd thesis, Université Montpellier II - Sciences et Techniques du Languedoc, 2008. http://tel.archives-ouvertes.fr/tel-00361392.

Full text

Abstract:

Le modèle standard de la physique des particules a été développé dans les années 1970. Malgré de grands succès expérimentaux, il présente des problèmes qui ne peuvent être résolus qu'avec des extensions du modèle. La supersymétrie est un candidat particulièrement intéressant, qui postule simplement une symétrie supplémentaire entre bosons et fermions. En plus d'apporter des réponses dans le domaine de la physique des particules, la supersymétrie trouve des applications intéressantes en cosmologie. Elle contient des candidats possibles à la matière noire, qui représente 25\% de la densité d'énergie de l'Univers et dont la nature est inconnue. Un autre problème cosmologique intéressant est celui des problèmes du lithium dans le cadre de la nucléosynthèse primordiale décrivant la production des éléments légers dans les premières secondes de l'Univers après le Big Bang. Les abondances de lithium prévues par la théorie sont incompatibles avec les observations. J'étudie ici un scénario où une particule supersymétrique, le gravitino, est un candidat à la matière noire et la production de cette particule par désintégration d'autres particules supersymétriques permet de résoudre les problèmes du lithium.

APA, Harvard, Vancouver, ISO, and other styles

9

Sebastianutti, Marco. "Geodesic motion and Raychaudhuri equations." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18755/.

Full text

Abstract:

The work presented in this thesis is devoted to the study of geodesic motion in the context of General Relativity. The motion of a single test particle is governed by the geodesic equations of the given space-time, nevertheless one can be interested in the collective behavior of a family (congruence) of test particles, whose dynamics is controlled by the Raychaudhuri equations. In this thesis, both the aspects have been considered, with great interest in the latter issue. Geometric quantities appear in these evolution equations, therefore, it goes without saying that the features of a given space-time must necessarily arise. In this way, through the study of these quantities, one is able to analyze the given space-time. In the first part of this dissertation, we study the relation between geodesic motion and gravity. In fact, the geodesic equations are a useful tool for detecting a gravitational field. While, in the second part, after the derivation of Raychaudhuri equations, we focus on their applications to cosmology. Using these equations, as we mentioned above, one can show how geometric quantities linked to the given space-time, like expansion, shear and twist parameters govern the focusing or de-focusing of geodesic congruences. Physical requirements on matter stress-energy (i.e., positivity of energy density in any frame of reference), lead to the various energy conditions, which must hold, at least in a classical context. Therefore, under these suitable conditions, the focusing of a geodesics "bundle", in the FLRW metric, bring us to the idea of an initial (big bang) singularity in the model of a homogeneous isotropic universe. The geodesic focusing theorem derived from both, the Raychaudhuri equations and the energy conditions acts as an important tool in understanding the Hawking-Penrose singularity theorems.

APA, Harvard, Vancouver, ISO, and other styles

10

Williams, James Harley. "Fang Lizhi's big bang science and politics in MAO's China /." 1994. http://catalog.hathitrust.org/api/volumes/oclc/40388520.html.

Full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Hot Big Bang cosmology"

1

A, Rubakov V., ed. Introduction to the theory of the early universe: Hot big bang theory. Singapore: World Scientific, 2011.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Fleisher, Paul. The big bang. Minneapolis: Twenty-First Century Books, 2006.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

3

Paul, Parsons. The big bang. New York: DK Publishing, 2001.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

4

The big bang. 3rd ed. New York: W.H. Freeman, 2001.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

5

The big bang. New York: W.H. Freeman, 1989.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

6

Steinhardt, Paul J. Endless universe: Beyond the Big Bang. New York: Doubleday, 2007.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

7

Steinhardt, Paul J. Endless universe: Beyond the big bang. New York, NY: Doubleday, 2007.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

8

Steinhardt, Paul J. Endless universe: Beyond the Big Bang. New York: Broadway Books, 2007.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

9

Craig, William Lane. Theism, atheism, and big bang cosmology. Oxford: Clarendon, 1995.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

10

1952-, Smith Quentin, ed. Theism, atheism, and big bang cosmology. Oxford [England]: Clarendon Press, 1993.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Book chapters on the topic "Hot Big Bang cosmology"

1

Perlov, Delia, and Alex Vilenkin. "The Hot Big Bang." In Cosmology for the Curious, 155–73. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57040-2_11.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Calcagni, Gianluca. "Hot Big Bang Model." In Classical and Quantum Cosmology, 13–62. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-41127-9_2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Calcagni, Gianluca. "Big-Bang Problem." In Classical and Quantum Cosmology, 261–300. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-41127-9_6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Bari, Pasquale Di. "Big Bang nucleosynthesis." In Cosmology and the Early Universe, 183–93. Boca Raton : CRC Press, [2018] | Series: Series in astronomy and astrophysics: CRC Press, 2018. http://dx.doi.org/10.1201/9781138496903-14.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Elizalde, Emilio. "The Big Bang Theory." In The True Story of Modern Cosmology, 167–205. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-80654-5_6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Perlov, Delia, and Alex Vilenkin. "Problems with the Big Bang." In Cosmology for the Curious, 227–33. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57040-2_15.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Parker, Barry. "Plasma Cosmology." In The Vindication of the Big Bang, 325–36. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-5980-5_15.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Sarkar, Subir. "The Standard Big Bang Cosmology." In Astrophysics and Space Science Library, 37–96. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4175-8_2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Sarkar, Subir. "Introduction to Big Bang Cosmology." In Recent Developments in Particle Physics and Cosmology, 219–80. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0676-7_10.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Galluccio, M. "Pre—Big—Bang, Gravitons and Cosmology." In Generation of Cosmological Large-Scale Structure, 295–302. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-009-0053-0_22.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Hot Big Bang cosmology"

1

Mathews, G. J., Takuma Suda, Takaya Nozawa, Akira Ohnishi, Kiyoshi Kato, Masayuki Y. Fujimoto, Toshitaka Kajino, and Shigeru Kubono. "Big Bang Cosmology." In ORIGIN OF MATTER AND EVOLUTION OF GALAXIES: The 10th International Symposium on Origin of Matter and Evolution of Galaxies: From the Dawn of Universe to the Formation of Solar System. AIP, 2008. http://dx.doi.org/10.1063/1.2943636.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Mathews, Grant J. "Big Bang Nucleosynthesis and the Key Questions in Big Bang Cosmology." In 10th Symposium on Nuclei in the Cosmos. Trieste, Italy: Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.053.0231.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Borunda, Mónica, and M. Ruiz Altaba. "Pre-big-bang in string cosmology." In The sixth Mexican workshop on particles and fields. American Institute of Physics, 1998. http://dx.doi.org/10.1063/1.56633.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Olive, Keith A. "Big Bang Nucleosynthesis in the Post-WMAP Era." In THE NEW COSMOLOGY: Conference on Strings and Cosmology; The Mitchell Symposium on Observational Cosmology. AIP, 2004. http://dx.doi.org/10.1063/1.1848327.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Vernizzi, F. "CMB anisotropies in pre-big bang cosmology." In Cosmology and particle physics. AIP, 2001. http://dx.doi.org/10.1063/1.1363574.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

MAHARANA, JNANADEVA. "PRE-BIG BANG STRING COSMOLOGY AND HOLOGRAPHY." In Proceedings of the Third International Workshop on Particle Physics and the Early Universe. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812792129_0073.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Fields, Brian D., Livius Trache, and Sabin Stoica. "Big Bang Nucleosynthesis in the New Cosmology." In EXOTIC NUCLEI AND NUCLEAR/PARTICLE ASTROPHYSICS (II): Proceedings of the Carpathian Summer School of Physics 2007. AIP, 2008. http://dx.doi.org/10.1063/1.2870312.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Turner, Michael S. "The hot big bang and beyond." In CAM-94 Physics meeting. AIP, 1995. http://dx.doi.org/10.1063/1.48810.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Feinstein, A. "Creation of pre-big-bang universes from colliding plane waves." In Cosmology and particle physics. AIP, 2001. http://dx.doi.org/10.1063/1.1363573.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Dent, Thomas, Steffen Stern, Christof Wetterich, Arttu Rajantie, Carlo Contaldi, Paul Dauncey, and Horace Stoica. "Big Bang nucleosynthesis as a probe of varying fundamental “constants”." In PARTICLES, STRINGS, AND COSMOLOGY. AIP, 2007. http://dx.doi.org/10.1063/1.2823807.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Hot Big Bang cosmology"

1

Paris, Mark W. Quantum Effects on Cosmology: Probing Physics Beyond the Standard Model with Big Bang. Office of Scientific and Technical Information (OSTI), February 2018. http://dx.doi.org/10.2172/1422934.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Paris, Mark W. Institutional Computing: Final Report Quantum Effects on Cosmology: Probing Physics Beyond the Standard Model with Big Bang Nucleosynthesis. Office of Scientific and Technical Information (OSTI), February 2018. http://dx.doi.org/10.2172/1422935.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!