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 678 for “"Galaxy"”.
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Empirical Measurements of Massive Galaxy and Active Galaxy Evolution
Using new wide-area galaxy redshift surveys, we explore the evolutionof the most massive galaxies and the most luminous quasars in the universe over much of cosmic history. Quasars and massive red galaxies both areextremes; the most luminous high redshift quasars likely play a key role in shaping …
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The Impact of realistic galaxy orbits on jellyfish galaxy properties
Galaxy clusters, the most massive dark matter halos in the universe, 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 …
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Probing Galaxy Evolution with AKARI
… of these extragalactic fields, was to perform galaxy number counts, the most basic statistical property of galaxy populations. Presented are the counts at 3, 4, 7, 11, 15 and 18 microns. These number counts were compared with published results and galaxy evolution models. These models are …
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Galaxy evolution : near and far
… from interstellar gas is the cornerstone of galaxy evolution. This thesis represents work undertaken in order to characterise the role of cool interstellar gas, and its relation to star formation, in galaxy evolution across cosmic time. In particular, it concentrates on star forming galaxies …
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Measuring Galaxy Asymmetry in Different Dimensions
Galaxy Asymmetry is correlated to a wide variety of phenomena, such as galaxy interactions, merger history, galaxy color and structure. The upcoming SKA radio-telescopes will record unprecedented numbers of HI cubes. An SKA pathfinder, the upcoming WALLABY survey will record thousands of HI galaxy …
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Towards AMR Simulations of Galaxy Formation
Numerical simulations present a fundamental building block of our modern theoretical understanding of the Universe. As such the work in this thesis is primarily concerned with understanding fundamental differences that lie between the different hydrodynamic schemes. In chapter 3 I outline the …
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Galaxy groups from observations and simulations
… numerous and most of the galaxies reside within galaxy groups. Testing this model requires that the precise measurements delivered by galaxy surveys can be compared to robust and equally precise theoretical models. The current project consists of two parts. In the first part, we investigate the …
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WISEly deconstructing the Great Andromeda Galaxy
… spectrum. While numerous surveys of the galaxy exist, very few cover its extended disk and greater halo that incorporates its globular clusters and rich satellite system. WISE observed the entire region of M 31, and with multi-wavelength data and measurements having recently become …
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Deconstructing the WISE nearby galaxy population
This thesis aims to test the reliability of the Wide-Field Infrared Space Explorer (WISE) star formation indicators centred at 12 and 22 µm. To accomplish this, the total infrared (TIR) luminosity was used as a calibrator to understand the behaviour of the two indicators. Our sample consists of …
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The stability of a model galaxy.
Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Mathematics.
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Cosmological signatures in galaxy cluster structures
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
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Environmental Impacts on Simulated Galaxy Properties
… I work towards a more complete picture of galaxy evolution by studying how galaxies are affected by the environment in which they evolve. I use cosmological and zoom-in simulations to study the components of galaxies and how they relate to each other. I start with a study on measuring the …
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A multimodal galaxy-based geographic system
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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The XMM-Newton/SDSS galaxy cluster survey
Galaxy clusters are the largest known gravitationally bound objects, their study is important for both an intrinsic understanding of their systems and an investigation of the large scale structure of the universe. The multi- component nature of galaxy clusters offers multiple observable signals …
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