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Dissertations / Theses on the topic 'Galaxy clusters/dynamics study'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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1

Millington, S. J. C. "Clusters of galaxies." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382461.

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2

Drake, Nick. "Wakes and dynamics of galaxy clusters." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326792.

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3

Parekh, Viral. "Morphological classification and dynamics of X-ray galaxy clusters." Doctoral thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/9539.

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4

Braglia, Filiberto Giorgio. "Study of optical properties and galaxy populations of galaxy clusters." Diss., kostenfrei, 2008. http://edoc.ub.uni-muenchen.de/9179/.

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Nastasi, Alessandro. "Multiwavelength Study of high redshift galaxy clusters." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-152323.

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6

Hodson, Alistair. "A non-Newtonian perspective of gravity : testing modified gravity theories in galaxies and galaxy clusters." Thesis, University of St Andrews, 2017. http://hdl.handle.net/10023/12016.

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This thesis attempts to test several frameworks of non-Newtonian gravity in the context of galaxies and galaxy clusters. The theory most extensively discussed was that of Modiﬁed Newtonian Dynamics (MOND) with Galileon gravity, Emergent Gravity (EG) and Modiﬁed Gravity (MOG) mentioned to a lesser extent. Speciﬁcally, the main focus of this thesis was to determine whether MOND and MOND-like theories were compatible with galaxy cluster data, without the need to include cold dark matter. To do this, the paradigms of Extended MOND (EMOND), Generalised MOND (GMOND) and superﬂuid dark matter were in

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7

Moran, Sean M. Djorgovski S. G. Ellis Richard S. "Understanding the physical processes driving galaxy evolution in clusters : a case study of two z~0.5 galaxy clusters /." Diss., Pasadena, Calif. : California Institute of Technology, 2008. http://resolver.caltech.edu/CaltechETD:etd-08212007-151300.

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8

Winkworth, Carolyn Louise. "An Observational Study of High Redshift Galaxy Clusters." Thesis, University of Bristol, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520307.

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9

Renaud, Florent. "Dynamics of the Tidal Fields and Formation of Star Clusters in Galaxy Mergers." Phd thesis, Université de Strasbourg, 2010. http://tel.archives-ouvertes.fr/tel-00508301.

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Dans les galaxies en interaction, de colossales forces de marée perturbent la morphologie des progéniteurs pour engendrer les longs bras d'étoiles, gaz et poussières que l'on observe parfois. En plus de leur effet destructeur, les forces de marée peuvent, dans certain cas, se placer dans une configuration protectrice appelée mode compressif. De tels modes protègent alors la matière en leur sein, en augmentant son énergie de liaison. Cette thèse se concentre sur l'étude de ce régime peu connu en quantifiant ses propriétés grâce à des outils numériques et analytiques appliqués à un spectaculaire

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10

Hall, Emily Anne. "Clusters and cosmic onions : a description of galaxy dynamics in the quasi-linear regime." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10057210/.

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This thesis investigates the dynamics of galaxies around clusters in the quasi-linear regime, with the ultimate aim of providing cluster mass constraints which can be combined with weak lensing measurements in order to perform tests of General Relativity. Dark matter simulations are populated with galaxies using a halo occupation distribution, and used to develop and test models which describe di↵erent aspects of galaxy dynamics around clusters. A heuristic analytical model is presented describing the infall profile of galaxies onto a cluster of given mass, which is shown to fit the simulation

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11

Dawson, William Anthony. "Constraining Dark Matter Through the Study of Merging Galaxy Clusters." Thesis, University of California, Davis, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3602041.

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<p> <b>Context:</b> The majority (~85%) of the matter in the universe is composed of dark matter, a mysterious particle that does not interact via the electromagnetic force yet does interact with all other matter via the gravitational force. Many direct detection experiments have been devoted to finding interactions of dark matter with baryonic matter via the weak force. It is still possible that dark matter interacts with itself via a strong scale force and has a self-scattering cross-section of ~0.5 cm<sup>2</sup>g<sup> -1</sup>. In fact such a strong scale scattering force could resolve s

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12

Wing, Joshua David. "A multi-wavelength study of galaxy clusters hosting radio sources." Thesis, Boston University, 2013. https://hdl.handle.net/2144/12891.

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Thesis (Ph.D.)--Boston University PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you.<br>Galaxy clusters play an important role in understanding the formation of structure in the Universe and can be used to constrain cosmological parameters. Thousands of clusters are known in the nearby Universe, b

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13

Souza, Juliana Crestani Ribeiro de. "Spatial distribution of galactic globular clusters : distance uncertainties and dynamical effects." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/156776.

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Fornecemos uma amostra de 170 Aglomerados Globulares Galácticos (GCs) e analisamos as propriedades de sua distribuição espacial. Utilizando um vasto catálogo de nuvens escuras identificadas, listamos os GCs que estão atrás de uma ou mais delas e que podem estar submetidos a uma extinção mais complexa do que a considerada por mapas de extinção. Valores de incerteza em distância são obtidos da literatura recente e comparados com valores derivados de uma fórmula de propagação de erro. GCs são agrupados de acordo com características inusitadas, tais como idades relativamente jovens ou possível con

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14

Nastasi, Alessandro [Verfasser], and Hans [Akademischer Betreuer] Böhringer. "Multiwavelength Study of high redshift galaxy clusters / Alessandro Nastasi. Betreuer: Hans Böhringer." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1031380019/34.

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15

D'Alfonso, Nadia. "A radio study of the high-redshift galaxy cluster field RCS J022434-0002.5 /." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112394.

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We present the 1.4-GHz catalog of the galaxy cluster field RCS J022434-0002.5, at a redshift of z = 0.773. A total of 194 sources were found within a &sim;0.28 degree2 region to a 5sigma depth of &sim;75 muJy. We show that the differential source counts for the cluster field are in good agreement with other radio surveys, and therefore do not indicate a strong excess of radio sources in the cluster compared to the field. We find 13 sources have optical counterparts with photometric redshifts within 1sigma of the cluster redshift and an additional 5 within 2sigma, and we consider these objects

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16

Nurgaliev, Daniyar Rashidovich. "A Study of the Radial and Azimuthal Gas Distribution in Massive Galaxy Clusters." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:11514.

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Clusters of galaxies are particularly interesting astrophysical systems, are the largest bound structures in the Universe, and contain fair sample of cosmic ingredients. Studies of cluster abundance as a function of mass and redshift were critical in establishing the standard model of cosmology. This dissertation presents results from X-ray imaging of massive distant (M > 10^14 M; 0:3 < z < 1.2) clusters, found via X-ray emission or Sunyaev-Zeldovich eff ect. This is the world's largest sample of massive galaxy clusters. We explore the radial and azimuthal profi les of the X-ray emitting gas a

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17

Peeples, Molly S. "Gravitationally lensed image simulations for the study of the substructure in galaxy clusters." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32913.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.<br>Includes bibliographical references (p. 49-50).<br>As gravitational lensing is susceptible to all gravitating matter-both baryonic and dark-it provides a potentially clean way to study the mass distribution of galaxy clusters. We are particularly interested in the substructure of dark matter in galaxy clusters as it signals constraints on various cosmological parameters as well as cluster evolution. Gravitationally lensed image simulations are needed in order to determine just how much can be learned from current

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18

Cluver, Michelle E. "Probing distant clusters : a pre-SALT photometric study of intermediate redshift galaxy cluster." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/4415.

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19

Sponseller, Daniel Ray. "Molecular Dynamics Study of Polymers and Atomic Clusters." Thesis, George Mason University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10685723.

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<p> This dissertation contains investigations based on Molecular Dynamics (MD) of a variety of systems, from small atomic clusters to polymers in solution and in their condensed phases. The overall research is divided in three parts. First, I tested a new thermostat in the literature on the thermal equilibration of a small cluster of Lennard-Jones (LJ) atoms. The proposed thermostat is a Hamiltonian thermostat based on a logarithmic oscillator with the outstanding property that the mean value of its kinetic energy is constant independent of the mass and energy. I inspected several weak-couplin

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20

Balestra, I., A. Mercurio, B. Sartoris, et al. "CLASH-VLT: DISSECTING THE FRONTIER FIELDS GALAXY CLUSTER MACS J0416.1-2403 WITH ∼800 SPECTRA OF MEMBER GALAXIES." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621406.

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We present VIMOS-Very Large Telescope (VLT) spectroscopy of the Frontier Fields cluster MACS. J0416.1-2403 (z = 0.397). Taken as part of the CLASH-VLT survey, the large spectroscopic campaign provided more than 4000 reliable redshifts over similar to 600 arcmin(2), including similar to 800 cluster member galaxies. The unprecedented sample of cluster members at this redshift allows us to perform a highly detailed dynamical and structural analysis of the cluster out to similar to 2.2 r(200) (similar to 4Mpc). Our analysis of substructures reveals a complex system composed of a main massive clust

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21

Dias, Bruno Moreira de Souza. "Formation and evolution of globular clusters in the Galaxy and Magellanic Clouds." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/14/14131/tde-26082014-090039/.

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Globular clusters are tracers of the formation and evolution of their host galaxies. Kinematics, chemical abundances, age and position of the clusters allows tracing interactions between Milky Way and surrounding galaxies and outlines their chemical enrichment history. In this thesis we analyse mid-resolution spectra of about 800 red giant stars in 51 Galactic globular clusters. It is the first time that [Fe/H] and [Mg/Fe] derived in a consistent way are published for such a huge sample of globular clusters, almost 1/3 of the total number of catalogued clusters. Our metallicities are showed to

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22

Piel, Jennifer [Verfasser]. "A Detailed Study of Galaxy Clusters with Weak Gravitational Lensing and X-rays / Jennifer Piel." Bonn : Universitäts- und Landesbibliothek Bonn, 2012. http://d-nb.info/1044081252/34.

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23

Giacintucci, Simona <1975&gt. "Multiwavelenght study of cluster mergers and consequences for the radio emission properties of galaxy clusters." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/353/.

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In the present thesis a thourough multiwavelength analysis of a number of galaxy clusters known to be experiencing a merger event is presented. The bulk of the thesis consists in the analysis of deep radio observations of six merging clusters, which host extended radio emission on the cluster scale. A composite optical and X–ray analysis is performed in order to obtain a detailed and comprehensive picture of the cluster dynamics and possibly derive hints about the properties of the ongoing merger, such as the involved mass ratio, geometry and time scale. The combination of the high qual

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24

Sarron, Florian. "Galaxy clusters in the cosmic web Searching for filaments and large-scale structure around DAFT/FADA clusters Weak lensing study of 16 DAFT/FADA clusters: Substructures and filaments." Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS366.

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En tant que structures liées les plus massives de l’univers, les amas de galaxies permettent d’étudier l’influence de l’environnement sur l’évolution des galaxies. Dans ce manuscrit, je présente AMASCFI, un algorithme de détection d’amas développé durant la thèse et utilise le catalogue d’amas obtenu à partir des décalages spectraux photométriques du relevé Canada France Hawaii Telescope Legacy Survey (CFHTLS) pour étudier le rôle des amas sur l’évolution des galaxies. Je démontre les bonnes performances d’AMASCFI sur Euclid et le CFHTLS à partir de données simulées. Je l’applique au CFHTLS po

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25

Tang, Chi Ming. "Structure and dynamics of doped ionic clusters : a computational study." HKBU Institutional Repository, 1991. https://repository.hkbu.edu.hk/etd_ra/5.

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26

Bellini, Andrea, Mattia Libralato, Luigi R. Bedin та ін. "The HST Large Programme on ω Centauri. II. Internal Kinematics". IOP PUBLISHING LTD, 2018. http://hdl.handle.net/10150/627043.

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In this second installment of the series, we look at the internal kinematics of the multiple stellar populations of the globular cluster omega Centauri in one of the parallel Hubble Space Telescope (HST) fields, located at about 3.5 hal-flight radii from the center of the cluster. Thanks to the over 15 yr long baseline and the exquisite astrometric precision of the HST cameras, well-measured stars in our proper-motion catalog have errors as low as similar to 10 mu as yr(-1), and the catalog itself extends to near the hydrogen-burning limit of the cluster. We show that second-generation (2G) st

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27

Luppino, Gerard Anthony. "Design and use of a large-format CCD instrument for the identification and study of distant galaxy clusters." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/69703.

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28

Libralato, Mattia, Andrea Bellini, Luigi R. Bedin та ін. "The HST Large Programme on ω Centauri. III. Absolute Proper Motion". IOP PUBLISHING LTD, 2018. http://hdl.handle.net/10150/627099.

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In this paper, we report a new estimate of the absolute proper motion (PM) of the globular cluster NGC 5139 (omega Cen) as part of the HST large program GO-14118+ 14662. We analyzed a field 17 arcmin southwest of the center of omega Cen and computed PMs with epoch spans of similar to 15.1 years. We employed 45 background galaxies to link our relative PMs to an absolute reference-frame system. The absolute PM of the cluster in our field is (mu(alpha) cos delta, mu(delta))=(-3.341. 0.028, -6.557 +/- 0.043) mas yr(-1). Upon correction for the effects of viewing perspective and the known cluster r

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29

Weisz, Daniel R., Sergey E. Koposov, Andrew E. Dolphin, et al. "A HUBBLE SPACE TELESCOPE STUDY OF THE ENIGMATIC MILKY WAY HALO GLOBULAR CLUSTER CRATER." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621220.

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We analyze the resolved stellar populations of the faint stellar system, Crater, based on deep optical imaging taken with the Advanced Camera for Surveys on the Hubble Space Telescope. Crater's color-magnitude diagram (CMD) extends similar to 4 mag below the oldest main-sequence (MS) turnoff. Structurally, we find that Crater has a half-light radius of similar to 20 pc and no evidence for tidal distortions. We model. Crater's CMD as a simple stellar population (SSP) and alternatively by solving for its full star formation history. In both cases, Crater is well. described by an SSP with an age

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Spencer, Meghin E., Mario Mateo, Matthew G. Walker, and Edward W. Olszewski. "A Multi-epoch Kinematic Study of the Remote Dwarf Spheroidal Galaxy Leo II." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/623237.

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We conducted a large spectroscopic survey of 336 red giants in the direction of the Leo II dwarf galaxy using Hectochelle on the Multiple Mirror Telescope, and we conclude that 175 of them are members based on their radial velocities and surface gravities. Of this set, 40 stars have never before been observed spectroscopically. The systemic velocity of the dwarf is 78.3 +/- 0.6 km s(-1) with a velocity dispersion of 7.4 +/- 0.4 km s(-1). We identify one star beyond the tidal radius of Leo II but find no signatures of uniform rotation, kinematic asymmetries, or streams. The stars show a strong

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31

Ignesti, Alessandro. "A combined JVLA and Chandra study of the Abell 2626 galaxy cluster." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/12817/.

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In this thesis work we carried out an accurate analysis of new observations of the galaxy cluster Abell 2626 in the radio and X-ray bands. Its radio emission is characterized by the presence of a system of peculiar radio sources, the arcs , whose properties differs from the properties of the common cluster diffuse radio sources. In the past years, several models have been proposed to explain their origin. Our work aims at investigating the origin of the arcs. We analyzed new JVLA observations of the cluster at 3.0 GHz and 5.5 GHz. During the radio analysis we detected the arcs at 3.0 GHz and p

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32

Luo, Jia. "Computer molecular dynamics simulation study of isomerization and melting of small alkali-halide clusters." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/27674.

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33

Rojas-Cervellera, Víctor. "Ab initio molecular dynamics study of thiolate-protected gold clusters and their interaction with biomolecules." Doctoral thesis, Universitat Politècnica de Catalunya, 2015. http://hdl.handle.net/10803/317382.

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Thiolate monolayer-protected gold clusters (AuMPCs) are being used in various biological and biomedical applications due to their unique physical and chemical properties. The fact that gold-sulphur bonds are very stable enables the binding of biomolecules in the surface of gold clusters through a cysteine, an amino acid that contains a thiol group (SH). Specific AuMPCs-peptide conjugates can cross the blood-brain barrier without altering its integrity, opening the door for the treatment of pathologies related to the central nervous system, such as Alzheimer or Parkinson. Moreover, AuMPCs repre

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34

Ubertosi, Francesco. "The first Chandra study of Abell 795: a FR0 radio galaxy at the center of a sloshing cluster." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/21460/.

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Questo lavoro di tesi è il primo studio X-ray dedicato all’ammasso di galassie Abell 795 (z ∼ 0.137). L’analisi è stata svolta con l’obiettivo di descrivere accuratamente le proprietà dell’emissione X di A795, e di mettere in relazione le proprietà dell’ICM con le caratteristiche della BCG, una radio galassia compatta di tipo FR0, per capire se l’ambiente può impedire la formazione di una morfologia radio estesa. Abbiamo esaminato un’osservazione di archivio non ancora pubblicata del telescopio Chandra (esposizione di 29.7 ks), compiendo un’analisi dettagliata sia dell’ammasso che della sorgen

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35

Angus, Garry W. "Modified Newtonian dynamics at all astrophysical scales." Thesis, University of St Andrews, 2008. http://hdl.handle.net/10023/530.

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In this thesis I test the modified Newtonian dynamics as an alternative to the cold dark matter hypothesis. In the Milky Way, I show that the dynamics of the dwarf galaxies are well described by the paradigm and I confirm its distant low surface brightness globular clusters provide a strong test, for which I make predictions. Through analysis of a sample of 26 X-ray bright galaxy groups and clusters I demonstrate that the three active neutrinos and their anti-particles are insufficient to reconcile modified Newtonian dynamics with the observed temperatures of the X-ray emitting gas, nor with w

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Lugo, Preciado Jesus Gustavo. "Dynamics of ligands on gold surfaces to obtain Janus nanoclusters : a theoretical and experimental investigation." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066570/document.

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Une étude théorique couplée à une partie expérimentale a été entreprise sur la dynamique de l'échange de ligand sur des surfaces de nanoclusters (GNC) dans le but de montrer qu'il était possible de contrôler les propriétés structurales et optiques de GNC à travers la composition de la couronne de ligand. Nos études de calcul ont été effectuées par la théorie fonctionnelle de la densité en chimie quantique (approche Kohn - Sham). Nous avons analysé les principales caractéristiques UV - Visible des spectres calculés par TD - DFT / niveau de CAMB3LYP pour les clusters métalliques Au13, Au25 et Au

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Sowdi, Ravindra Bose Karthik. "A study of the properties of mesoscopic consensus clusters that arise due to Ising dynamics on graphs." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/32598/.

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We studied the impact of graph structure and temperature has on the sizes and lifetimes of crowds (mesoscopic clusters of consensus) that form when due to Ising Spin dynamics. Spin models have proven successful in modelling the formation of global consensus in opinion for large groups of people. We focus on the case where lots of small groups form consensuses but no global consensus forms. Our results can be interpreted in the light of consumer opinion and give an explanation for fads and brand reputation. Data was obtained by performing Monte Carlo simulations of the Ising Model on various gr

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Mozahem, Najib Ali. "Identities, categories, and clusters : a study of category dynamics and cluster spanning in the Lebanese newspaper industry 1851-1974." Thesis, Durham University, 2015. http://etheses.dur.ac.uk/11348/.

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Organizational ecologists have always argued for the need to take account of the whole industry while studying how certain characteristics might affect the mortality of organizations. They argued that concepts such as legitimacy and competition were the driving forces behind organizational dynamics. Recently, researchers have started to pay more attention to a usually ignored topic: audience perceptions. Legitimacy, for example, is no longer modeled as the number of organizations in a population. It is now thought to be dependent on how audience members perceive these organizations. By bringin

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Mitric, Roland. "Structure-reactivity relation, optical properties and real-time study of ultrafast processes in atomic clusters." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2003. http://dx.doi.org/10.18452/15007.

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Die Untersuchungen der nichtskalierbaren Eigenschaften von Clustern in dem Größenregime, in dem jedes Atom zählt, zeigten, daß hier neuartige Phänomene und Funktionalität entstehen können. Dadurch motiviert wurden in dieser Arbeit: i) strukturelle und elektronische Eigenschaften sowie die Reaktivität von Metall Clustern, ii) stationäre optische Eigenschaften und iii) zeitabhängige Eigenschaften und optimale Kontrolle von ultraschnellen Prozessen in Edelmetallcluster und in nonstoichiometrischen Natrium-Fluorid Cluster, untersucht.<br>The study of the nonscalable properties of clusters in

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40

Gonzalez, Ines M. "THEORETICAL STUDY OF THE STRUCTURES AND ENERGETICS OF AROMATIC CLUSTERS: DEVELOPMENT OF RELIABLE AND PRACTICAL THEORETICAL MODELS FOR INTERMOLECULAR POTENTIALS." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1164652307.

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41

Silva, Leandro José Beraldo e. "Propriedades dinâmicas da matéria escura." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-06072015-114443/.

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Esta tese tem como objetivo o estudo de aspectos dinâmicos e estatísticos da matéria escura em distribuições esféricas de massa. O fato de suas partículas constituintes interagirem gravitacionalmente mas não eletromagneticamente, e portanto sua evolução ser regida por interações de longo alcance, traz algumas complicações teóricas na descrição de suas propriedades nos termos da mecânica estatística, dificuldades compartilhadas com sistemas auto-gravitantes em geral. Para melhor compreender essas propriedades, estudamos as distribuições de matéria escura em três abordagens diferentes. Na prime

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42

Blaise, Philippe. "Dynamique moléculaire quantique : méthodes numériques et étude physique de la structure, de la thermodynamique, de la stabilité et de la fragmentation des agrégats métalliques de sodium." Université Joseph Fourier (Grenoble), 1998. http://www.theses.fr/1998GRE10110.

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Le but de cette these est l'etude des agregats metalliques de sodium par la simulation numerique. Nous avons developpe deux codes de calculs de dynamique moleculaire ab initio en fonctionnelle de densite. Le premier se fonde sur le modele semi-classique de thomas-fermi etendu. La resolution est en espace reel et utilise la methode car-parrinello. Son cout est en o(n), et nous avons mis au point un pseudopotentiel qui accelere le calcul. Au sacrifice des effets de couche, nous pouvons etudier un vaste ensemble d'agregats. Nous montrons alors qu'avec un minimum d'ajustements, les agregats de sod

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Wilson, Susan. "A multi-wavelength study of a sample of galaxy clusters / Susan Wilson." Thesis, 2012. http://hdl.handle.net/10394/15822.

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In this dissertation we aim to perform a multi-wavelength analysis of galaxy clusters. We discuss various methods for clustering in order to determine physical parameters of galaxy clusters required for this type of study. A selection of galaxy clusters was chosen from 4 papers, (Popesso et al. 2007b, Yoon et al. 2008, Loubser et al. 2008, Brownstein & Mo at 2006) and restricted by redshift and galactic latitude to reveal a sample of 40 galaxy clusters with 0.0 < z < 0.15. Data mining using Virtual Observatory (VO) and a literature survey provided some background information about each of the

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Muzzin, Adam Virgil. "An infrared study of distant galaxy clusters." 2008. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=742575&T=F.

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Blindert, Kris. "Internal dynamics of galaxy clusters in the Red-Sequence Cluster Survey." 2006. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=449820&T=F.

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Moran, Sean Michael. "Understanding the Physical Processes Driving Galaxy Evolution in Clusters: A Case Study of Two z ~ 0.5 Galaxy Clusters." Thesis, 2008. https://thesis.library.caltech.edu/3182/1/thesis_final.pdf.

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<p>Clusters of galaxies represent the largest laboratories in the universe for testing the incredibly chaotic physics governing the collapse of baryons into the stars, galaxies, groups, and diffuse clouds that we see today. Within the cluster environment, there are a wide variety of physical processes that may be acting to transform galaxies.</p> <p>In this thesis, we combine extensive Keck spectroscopy with wide-field HST imaging to perform a detailed case study of two intermediate redshift galaxy clusters, Cl 0024+1654 (z=0.395) and MS 0451-03 (z=0.540). Leveraging a comprehensive multiwa

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Braglia, Filiberto Giorgio [Verfasser]. "Study of optical properties and galaxy populations of galaxy clusters / vorgelegt von Filiberto Giorgio Braglia." 2008. http://d-nb.info/991253906/34.

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Ouellette, Nathalie N. Q. "The Dynamical Properties of Virgo Cluster Galaxies." Thesis, 2012. http://hdl.handle.net/1974/7720.

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By virtue of its proximity, the Virgo Cluster is an ideal laboratory for us to test our understanding of the formation of structure in our Universe. In this spirit, we present a dynamical study of 33 gas-poor and 34 gas-rich Virgo galaxies as part of the Spectroscopic and H-band Imaging of Virgo survey. Our final spectroscopic data set was acquired at the 3.5-m telescope at the Apache Point Observatory. Hα rotation curves for the gas-rich galaxies were modelled with a multi-parameter fit function from which various velocity measurements were inferred. Analog values were measured off of the ob

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Stairs, Jason Robert. "A study of ionization dynamics in clusters." 2004. http://www.etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-566/index.html.

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Marinova, Irina Stoilova. "The properties of barred disks in the field and dense environments : implications for galaxy evolution." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-4197.

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Stellar bars are the most important internal drivers of the evolution of disk galaxies because they efficiently redistribute mass and angular momentum in the baryonic and dark matter components of galaxies. Mounting evidence suggests that mechanisms other than major mergers of galaxies, such as minor mergers, gas accretion, and bar-driven secular processes, play an important role in galaxy evolution since a redshift z~2. In order to characterize the evolution of barred disks, this thesis presents one of the most comprehensive studies of barred galaxies in the field at low redshifts, and also

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