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 15 of 15 for “"Cosmic web"”.
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The cosmic web in the Laduma field
Cosmic web filaments are an intermediate density environment that have been shown to play a role in the evolution of galaxies. In order to accurately identify cosmic web filaments in a volume, a complete sample of galaxies with accurate distance measurements is required. For this reason, studies …
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Phase-space reconstructions of cosmic velocities and the cosmic web
… the dark matter density field that forms the cosmic web, and cosmic velocities, for which both aspects of my work are delved into, the theoretical formalism and the results of its applications to cosmological simulations and also to a galaxy redshift survey.The foundation of our method is …
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Detecting the magnetic cosmic web through deep radio polarization imaging
… large-scale structure (the so-called magnetic cosmic web).
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The effect of the cosmic web on galaxy evolution in RESOLVE-A
… stellar mass and colour, and the distance to cosmic web filaments in both simulations and data. However, the effect of filaments on the gas supply of galaxies is still under investigation due to conflicting results. I use data from the Resolved Spectroscopy of a Local Volume (RESOLVE) survey, …
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The HI Lyman-alpha opacity at redshift 2.7 < z < 3.6
… in large-scale filaments as part of the overall cosmic web. The luminous extragalactic objects that we can observe today, such as galaxies and quasars, are surrounded by the IGM in the most dense regions within the cosmic web. The radiation of these objects contributes to the so-called …
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On the evolution of large-scale structure in a cosmic void
… of dark energy significantly more by mapping the cosmic web to unprecedented precision. To take advantage of such state-of-the-art technologies, the evermore accurate modelling of structure formation is absolutely necessary. While relativistic linear and non-relativistic (Newtonian) non-linear …
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Star formation, quenching and chemical enrichment in local galaxies from integral field spectroscopy
… scales. Gas flows (including inflows from the cosmic web and supernovae-driven outflows) are con- sidered to act as self-regulatory mechanisms, generating the scaling relations between stellar mass, star formation rate and metallicity observed in the local Universe by large spectroscopic …
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Gas in Void Galaxies
… within the deepest underdensities of the Cosmic Web, present an ideal population for the study of galaxy formation and evolution in an environment undisturbed by the complex processes modifying galaxies in clusters and groups, and provide an observational test for theories of cosmological …
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Modeling Astrophysical and Large-Scale Structure Signatures in Axion Cosmologies
… and ellipticity spectra. By publishing the COSMICPROFILES Python package we enhance reproducibility and accessibility of our results. To reveal the morphology of the cosmic web, we then apply an advanced segmentation algorithm (NEXUS+). We report high mean densities of filaments, sheets and …
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The influences of dark matter halo formation history on black hole growth, circumgalactic gas expulsion and galaxy evolution
… matter and gas, embedded in the large-scale "cosmic web". To build a self-consistent model for how galaxies form and evolve, it is vital to understand how galaxies regulate their formation through interaction with the "circumgalactic medium" that surrounds them, and at present the nature and …
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A detailed view of filaments and sheets of the warm-hot intergalactic medium
… could reside in the filaments and sheets of the cosmic web at high temperatures of T = 10^4.5 - 10^7 K, but only at low to intermediate densities, and constitutes the warm-hot intergalactic medium (WHIM). The high temperatures of the WHIM are caused by the formation of shocks and the subsequent …
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The chemical evolution of galaxies explored through multi-object integral field spectroscopy
… 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 produced within stars, whilst supernovae-driven outflows drive gas out of the galaxy, re-distributing metals in the …
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Chemical and kinematical evolution in nearby dwarf spheroidal galaxies
… the filamentary dark matter structure of the cosmic web, which is underscored by the fact that the plane extends in the direction of nearby galaxy groups. All in all, my studies of the chemical and kinematical properties of a sample of nearby dSph galaxies do confirm that these are dark matter …