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.
Results
Showing 1 to 9 of 9 for “"Circumgalactic medium"”.
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The Influence of Dark and Ordinary Matter Physics on Galaxy Formation
… show slow accretion of cold clumps through the circumgalactic medium and onto galaxies is an important process that fuels star formation, independent of background DM.
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Evolution of Supermassive Black Hole Feedback in Galaxy Clusters
… all galaxies. The outer boundary of a galaxy’s circumgalactic medium (CGM) should be the most sensitive probe of inflowing and outflowing material, but it is difficult to observe. Only in galaxy clusters, where the CGM gets hot enough to glow in X-rays, can the entire baryon cycle be observed– …
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Understanding the Epoch of Reionization Using Simulations of Lyman-α Emitting Galaxies and 21-cm Emission
… to theoretically model the intergalactic medium (IGM) and Lyman-α emitting (LAE) galaxies in the early universe. These galaxies are a key observational probe for understanding the period of the Universe’s history known as the Epoch of Reionization (EoR). In this thesis I explore: (i) how …
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Intergalactic baryon enrichment and implications for galaxy evolution at high redshift
… at [M/H]</~ -3, comparable to the intergalactic medium. While this result is tempting to interpret as evidence that a sizable fraction of LLSs are candidates of low-metallicity gas accreting onto galaxies, in a follow-up study of all LLSs at z ~ 3.5 we found that LLS abundances can be reasonably …
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Comparing Simulations and Observations of Galaxy Evolution: Methods for Constraining the Nature of Stellar Feedback
… with simulations, focusing on the tenuous circumgalactic medium. Informed by our previous studies, we investigate the sensitivity of this new mode of comparison to hydrodynamical subgrid prescription. Finally, we synthesize the results of these studies and identify future avenues of …
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Regulating and Quenching Star Formation in Galaxies across the Cosmic Epochs
… metal-poor gas accreted from the intergalactic/circumgalactic medium – or the lack thereof – is continuously imprinted onto the stars over cosmic times. This discovery points to “starvation”, i.e. the cut-off of gas supply, as the main path through which galaxies stop forming stars, i.e., …
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Stellar Halos: modelling formation in the L-Galaxies 2020 semi-analytic model
… halo stars was found to be minor, however, with circumgalactic medium enrichment from halo stars in comparison to outflows from galactic stars being on average . 1%. For clusters with virial masses exceeding 1.6 × 1014M, the brightest central galaxy and ICS (BCG+ICS) stars contained 42.44% of the …
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The influences of dark matter halo formation history on black hole growth, circumgalactic gas expulsion and galaxy evolution
… their formation through interaction with the "circumgalactic medium" that surrounds them, and at present the nature and impact of these interactions is poorly-constrained by both theory and observations. This thesis presents new insights into how galaxies affect their surroundings through …
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On the evolution of gaseous haloes in cosmological simulations of galaxy formation
The study of gaseous haloes holds the key to understanding gas flows in and out of galaxies, which in turn determines how galaxies form and evolve. However, recent observations have revealed them to be very complex, with the presence of significant amounts of multiphase gas, driven by a range of …