Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 34 for “"evolution of galaxies"”.
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Evolution of Galaxies in Clusters
In dieser Doktorarbeit studiere ich die Entstehung und Entwicklung von Galaxien in Galaxienhaufen sowohl theoretisch als auch unter Einbeziehung von Beobachtungsdaten. Diese Doktorarbeit gliedert sich in zwei Teile: Einem theoretischen Teil schliesst sich eine Datenanalyse an. Im ersten Kapitel …
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Evolution of galaxies in compact groups
This thesis presents new observations of the complete sample of galaxies in Hickson Compact Groups and combines these observations with various previous works to attempt to answer some fundamental questions about the nature, history, and dynamical state of these groups. The new data consist of …
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The evolution of galaxies and AGN
This thesis presents a study of some current questions regarding the evolution of galaxies and AGN. We first argue that the bright submillimetre number counts may be dominated by obscured AGN rather than ultraluminous starbursts. Through statistical analyses of the ECDFS and WHDF, we show that N_H …
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Evolution of Galaxies - Star Formation Histories in Nearby Spheroids
… is about an investigation into the formation of spheroidal type galaxies. The investigation began with modelling studies of early-type galaxies and spiral bulges (SBs). From galaxy formation modelling studies led by experiments with a sample galaxy, some results were obtained; nonsolar …
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Simulating the dynamical evolution of galaxies in group and cluster environments
… are harsh environments for their constituent galaxies. A variety of physical processes effective in these dense environments transform gas-rich, spiral, star-forming galaxies to elliptical or spheroidal galaxies with very little gas and therefore minimal star formation. The consequences of …
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The chemical evolution of galaxies explored through multi-object integral field spectroscopy
Galaxies are expected to grow and evolve via a series of physical processes relating to gas flows into and out of the galaxy. Inflows of gas from the surrounding cosmic web provide fuel for star formation, which subsequently causes an enrichment of the interstellar medium (ISM) with the metals …
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Paleocosmology : observational constraints on the evolution of galaxies and large-scale structure
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1996.
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Ultra-diffuse galaxy candidatesin stripe 82 clusters
The evolution of galaxies in the cluster environment is a complex process, with many outstanding questions. A wide range of galaxy morphologies, colours, sizes and luminosities are found in clusters, the least studied of which are the faint galaxy populations. Studying the faint end of the galaxy …
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A new twist on black holes: the role of black hole spin in galaxy formation.
We study the coevolution of black holes (BHs) and their host galaxies through cosmic time. The calculation is embedded in the GALFORM semi-analytic model which simulates the formation and evolution of galaxies in a cold dark matter (CDM) universe. The BH and galaxy formation models are coupled: …
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Existence and stability of stellardynamic models
We examine existence and stability of stationary solutions to the Vlasov-Poisson system. This system is used in stellardynmaics to describe the evolution of galaxies where collissions are neglected and the evolution is determined by the self-consistent gravitational field which is created by the …
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The effect of Adiabatic compression on the fundamental plane of bulges
… Fundamental Plane to investigate the phenomenon of bulge compression. Bulge compression takes place as disks grow around bulges. When the bulge is compressed the velocity dispersion of the bulge increases, according to the Virial theorem. This project has found the physical parameters of the …
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Observing galaxies in the Southern Filament of the Virgo Cluster with KAT-7 and WSRT
To date, our understanding of the formation and evolution of galaxies attributes a very important role to the neutral hydrogen (HI) gas since it constitutes the reservoir of fuel out of which galaxies form stars. In their evolution, galaxies interact with each other and with their environment, and …
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The Impact of realistic galaxy orbits on jellyfish galaxy properties
… decisively influence their environment and the evolution of galaxies within them. As galaxies move supersonically through the hot, magnetized intracluster medium (ICM) filling the space between galaxies in galaxy clusters, ram pressure stripping (RPS) can remove large fractions of the …
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Observational Investigations of the Progenitors of Supernovae
Supernovae (SNe) are the spectacular deaths of stars and have shaped the universe we see today. Their far-reaching influence affects the chemical and dynamical evolution of galaxies, star formation, neutron star and black hole formation, and they are largely responsible for most of the heavy …
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Investigating the Environmental Properties of Galaxies in the SDSS-MaNGA Survey
This thesis presents a study of galaxy evolution in the local universe. I study how environments shape the structures of galaxies, and how internal and external processes affect star formation. I perform four investigations of galaxy properties: a study of the relations between size, mass and …
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Comparing Simulations and Observations of Galaxy Evolution: Methods for Constraining the Nature of Stellar Feedback
… are a very useful tool for understanding how galaxies form and evolve over cosmological timescales not easily revealed through observations. However, they are only useful if they reproduce the sorts of galaxies that we see in the real universe. One of the ways in which simulations of this sort …
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Monitoring Broad Absorption-Line Quasar Variability
… hole may provide feedback to the host galaxy and offer an explanation for the co-evolution of galaxies with their super massive black holes that has been reported in the literature. Some outflows are manifested as broad absorption line (BAL) troughs in quasar spectra, and are measured at …
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