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Relevant bibliographies by topics / Intergalactic medium; Cosmology

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Academic literature on the topic 'Intergalactic medium; Cosmology'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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Journal articles on the topic "Intergalactic medium; Cosmology"

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Nath, Biman B. "Cosmology with the intergalactic medium." Pramana 53, no. 6 (1999): 1021–25. http://dx.doi.org/10.1007/s12043-999-0058-z.

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Bryan, Greg L., та Marie E. Machacek. "ThebDistribution of the Lyα Forest: Probing Cosmology and the Intergalactic Medium". Astrophysical Journal 534, № 1 (2000): 57–68. http://dx.doi.org/10.1086/308735.

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Sargent, Wallace L. W. "QSO Absorption Lines and Cosmology." Symposium - International Astronomical Union 124 (1987): 777–92. http://dx.doi.org/10.1017/s0074180900159911.

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The properties of the different types of QSO absorption systems are briefly summarized. An overview is given of the potential applications of absorption lines in cosmology. Recent work on the cosmological evolution of the different types of absorbers is discussed. The physical properties of the intergalactic medium are discussed in the light of recent work on the “Lyman alpha clouds”. The uses of the lines for studies of the evolution of clustering in the Universe are described. Recent puzzling results on common absorption in pairs of QSOs, particularly Q1037–2704 and Q1038–2712, are summarize

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Ferrara, Andrea. "Cosmic metal enrichment." Proceedings of the International Astronomical Union 4, S255 (2008): 86–99. http://dx.doi.org/10.1017/s1743921308024630.

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AbstractI review the present understanding of the process by which the universe has been enriched in the course of its history with heavy elements produced by stars and transported into the surrounding intergalactic medium. This process goes under the name of “cosmic metal enrichment” and presents some of the most challenging puzzles in present day physical cosmology. These are reviewed along with some proposed explanations that all together form a coherent working scenario.

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Duc, Pierre-Alain, Frédéric Bournaud, and Médéric Boquien. "Tidal dwarf galaxies as laboratories of star formation and cosmology." Proceedings of the International Astronomical Union 2, S237 (2006): 323–30. http://dx.doi.org/10.1017/s1743921307001676.

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AbstractStar formation may take place in a variety of locations in interacting systems: in the dense core of mergers, in the shock regions at the interface of the colliding galaxies and even within the tidal debris expelled into the intergalactic medium. Along tidal tails, objects may be formed with masses ranging from those of super-star clusters to dwarf galaxies: the so-called Tidal Dwarf Galaxies (TDGs). Based on a set of multi-wavelength observations and extensive numerical simulations, we show how TDGs may simultaneously be used as laboratories to study the process of star-formation (SFE

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Durrive, Jean-Baptiste, Hiroyuki Tashiro, Mathieu Langer, and Naoshi Sugiyama. "Mean Energy Density of Photogenerated Magnetic Fields Throughout the EoR." Proceedings of the International Astronomical Union 12, S333 (2017): 60–63. http://dx.doi.org/10.1017/s1743921317011309.

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AbstractThere seems to be magnetic fields at all scales and epochs in our Universe, but their origin at large scales remains an important open question of cosmology. In this work we focus on the generation of magnetic fields in the intergalactic medium due to the photoionizations by the first galaxies, all along the Epoch of Reionization. Based on previous studies which considered only isolated sources, we develop an analytical model to estimate the mean magnetic energy density accumulated in the Universe by this process. In our model, without considering any amplification process, the Univers

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Eastwood, Michael W., and Gregg Hallinan. "Full-Sky Maps of the VHF Radio Sky with the Owens Valley Radio Observatory Long Wavelength Array." Proceedings of the International Astronomical Union 12, S333 (2017): 110–13. http://dx.doi.org/10.1017/s1743921317011231.

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Abstract21-cm cosmology is a powerful new probe of the intergalactic medium at redshifts 20 ≳ z ≳ 6 corresponding to the Cosmic Dawn and Epoch of Reionization. Current observations of the highly-redshifted 21-cm transition are limited by the dynamic range they can achieve against foreground sources of low-frequency (<200 MHz) of radio emission. We used the Owens Valley Radio Observatory Long Wavelength Array (OVRO-LWA) to generate a series of new modern high-fidelity sky maps that capture emission on angular scales ranging from tens of degrees to ∼15 arcmin, and frequencies between 36 and 7

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Shapiro, Paul R. "Chemistry in the Early Universe." Symposium - International Astronomical Union 150 (1992): 73–82. http://dx.doi.org/10.1017/s0074180900089737.

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Galaxies and the first stars in the universe formed billions of years ago as a result of the cooperative effects of gravitational collapse and nonequilibrium chemistry. Gravity drew the primordial gas together into lumps; the formation of the first molecules in the universe, simple diatomic molecules like H2, H2+, HD, HeH+, LiH, and LiH+, may then have ensured that the heat generated by gravitational collapse and shock waves was radiated away rapidly enough to allow the gravitational collapse and fragmentation of these gaseous lumps to proceed to the point of forming stars and galaxies. We bri

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Li, Z., H. Gao, J.-J. Wei, Y.-P. Yang, B. Zhang, and Z.-H. Zhu. "Cosmology-insensitive estimate of IGM baryon mass fraction from five localized fast radio bursts." Monthly Notices of the Royal Astronomical Society: Letters 496, no. 1 (2020): L28—L32. http://dx.doi.org/10.1093/mnrasl/slaa070.

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ABSTRACT Five fast radio bursts (FRBs), including three apparently non-repeating ones, FRB 180924, FRB 181112, and FRB 190523, and two repeaters, FRB 121102 and FRB 180916.J0158+65, have already been localized so far. We apply a method developed recently by us to these five localized FRBs to give a cosmology-insensitive estimate of the fraction of baryon mass in the intergalactic medium, fIGM. Using the measured dispersion measure (DM) and luminosity distance dL data (inferred from the FRB redshifts and dL of Type Ia supernovae at the same redshifts) of the five FRBs, we constrain the local $f

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Cen, Renyue, and Jeremiah P. Ostriker. "Cold Dark Matter Cosmology with Hydrodynamics and Galaxy Formation: The Evolution of the Intergalactic Medium and Background Radiation Fields." Astrophysical Journal 417 (November 1993): 404. http://dx.doi.org/10.1086/173321.

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Dissertations / Theses on the topic "Intergalactic medium; Cosmology"

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OʹMeara, John M. "Cosmology from the high redshift intergalactic medium /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 2004. http://wwwlib.umi.com/cr/ucsd/fullcit?p3129951.

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Peeples, Molly S. "From Galaxies to the Intergalactic Medium." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1280965443.

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Leonard, Anthony Patrick Burford. "Simulating the Lyman-#alpha# forest." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300815.

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Calverley, Alexander Peter. "Probing the Intergalactic Medium with high-redshift quasars." Thesis, University of Cambridge, 2011. https://www.repository.cam.ac.uk/handle/1810/241943.

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Clues about the timing of reionization and the nature of the ionizing sources responsible are imprinted in the ionization and thermal state of the IGM. In this thesis, I use high-resolution quasar spectra in conjunction with state-of-the-art hydrodynamical simulations to probe the IGM at high redshift, focusing on the ionization and thermal state of the gas. After reionization, the ionization state of the IGM is set by the intensity of the ultraviolet background(UVB), quantified by the hydrogen photoionization rate, Γ_bkg. At high redshifts this has been estimated by measuring the mean flux in

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Kollmeier, Juna Ariele. "The intergalactic medium absorption, emission, disruption /." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1153856075.

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Higgins, Jonathan. "Lyman-alpha scattering in the intergalactic medium during the epoch of reionisation." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/8805.

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We examine resonant scattering of Lyα (Lyman-alpha) photons in the neutral hydrogen Intergalactic Medium (IGM) at high redshift. Lyα scattering plays a key role in the 21cm emission/absorption against the Cosmic Microwave Background via the 'Wouthuysen-Field Effect' Knowledge of the strength of Lyα scattering induced by the first sources will constitute a significant step in predicting and understanding the eventual observations of the impact of these objects on the signal from the IGM during the Epoch of Reionisation (EoR), using planned facilities such as the Square Kilometre Array. A quanti

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Klar, Jochen. "A detailed view of filaments and sheets of the warm-hot intergalactic medium." Phd thesis, Universität Potsdam, 2012. http://opus.kobv.de/ubp/volltexte/2012/5803/.

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In the context of cosmological structure formation sheets, filaments and eventually halos form due to gravitational instabilities. It is noteworthy, that at all times, the majority of the baryons in the universe does not reside in the dense halos but in the filaments and the sheets of the intergalactic medium. While at higher redshifts of z > 2, these baryons can be detected via the absorption of light (originating from more distant sources) by neutral hydrogen at temperatures of T ~ 10^4 K (the Lyman-alpha forest), at lower redshifts only about 20 % can be found in this state. The remain (abo

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Finley, Hayley. "Overdense regions in the intergalactic medium and the environments of high-redshift quasars." Thesis, Paris 6, 2014. http://www.theses.fr/2014PA066248/document.

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Des systèmes d'absorption Lorentziens, qui sondent les nuages de gaz HI de plus hautes densités de colonne, servent ici à sonder les environnements de galaxies hôtes de noyaux actifs à grand décalage spectral (z > 2). Ceci permet d'étudier l'effet des mécanismes de rétroaction des noyaux actifs sur les galaxies hôtes, tel que les vents à haute vitesse et l'ionisation intense. J'implémente deux techniques pour identifier les systèmes Lorentziens au décalage spectral du quasar dans les données du Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic Survey.Un tel système Lorentzien fa

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Liske, Jochen Physics Faculty of Science UNSW. "Cosmology with the Lyman alpha forest." Awarded by:University of New South Wales. School of Physics, 2000. http://handle.unsw.edu.au/1959.4/17870.

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In this thesis we investigate the large-scale distribution of Ly alpha forest absorption, the effect of ionizing radiation from QSOs on their surrounding intergalactic medium and the primordial abundance of deuterium. We develop a new technique for detecting structure on Mpc scales in the Ly alpha forest. This technique does not rely on identifying individual absorption lines but is rather based on the statistics of the transmitted flux. We demonstrate that the new method is significantly more sensitive to the presence of large-scale structure in the Ly alpha forest than a two-point correlati

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Cai, Zheng. "Cosmic Structure Formation: From First Star to Large-scale Filamentary Structure." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/578387.

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Theory of cosmic structure formation outlines how stars, galaxies, clusters of galaxies, and large-scale structures formed out of primordial density fluctuations. It presents us a picture of cosmic mass assembly, and places strong constraints on cosmological model. Both observations and theories suggest that structures formation follows a "bottom up" process, in which small, low-mass component form first, and gradually develop into larger, more massive systems. This dissertation focuses on three crucial stages of cosmic structure formation: first generation stars, quasar host galaxies and the

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Books on the topic "Intergalactic medium; Cosmology"

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Bahcall, John N. NASA astrophysical theory grant NAG5-2882, formation of structure in the universe: Final report. National Aeronautics and Space Administration, NASA Headquarters, 1997.

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Karl, Fisher, and United States. National Aeronautics and Space Administration., eds. NASA astrophysical theory grant NAG5-2882, formation of structure in the universe: Final report. National Aeronautics and Space Administration, NASA Headquarters, 1997.

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Book chapters on the topic "Intergalactic medium; Cosmology"

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Loeb, Abraham, and Steven R. Furlanetto. "The Intergalactic Medium." In The First Galaxies in the Universe. Princeton University Press, 2013. http://dx.doi.org/10.23943/princeton/9780691144917.003.0004.

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This chapter examines the intergalactic medium (IGM). Although much of astronomy focuses on the luminous material inside galaxies, the majority of matter today—and the vast majority at z > 6—actually lies outside these structures, in the IGM. This material ultimately provides the fuel for galaxy and cluster formation and—because it is much less affected by the complex physics of galaxies—offers a cleaner view of the underlying physical processes of structure formation and of fundamental cosmology. The chapter thus takes up the study on the properties of the IGM, especially during the era of the first galaxies (when the IGM underwent major changes).

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"Young Galaxies and the Intergalactic Medium." In Principles of Physical Cosmology. Princeton University Press, 2020. http://dx.doi.org/10.2307/j.ctvxrpxvb.27.

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Bryan, Greg L. "Cosmic Gas and the Intergalactic Medium." In The Encyclopedia of Cosmology. WORLD SCIENTIFIC, 2018. http://dx.doi.org/10.1142/9789813231962_0008.

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"23. Young Galaxies and the Intergalactic Medium." In Principles of Physical Cosmology. Princeton University Press, 2020. http://dx.doi.org/10.1515/9780691206721-025.

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