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 5 of 5 for “"First galaxies"”.
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Formation of the first galaxies under stellar feedback
… modeling galaxy formation, especially for the first galaxies, which are susceptible to stellar feedback due to their shallow potential wells. In this thesis I have investigated the impact of stellar feedback from the first generation of metal-free massive stars on the process of the first …
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Signatures of the first stars in relics of the first galaxies
In the billion years following the big bang, the first stars and galaxies fundamentally transformed the universe. They polluted the universe with the first heavy elements, and they produced high energy photons that reionized the intergalactic medium. Understanding this early era is at the frontier …
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The Legacy of the First Galaxies: Exploring Ancient Stars in the Milky Way
In the first several hundred million years after the Big Bang, the first stars and galaxies transformed the Universe. These ancient systems launched the creation of every galaxy we see today, including the Milky Way. Ever since, for the last 13 billion years, the Milky Way has grown through galaxy …
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A Machine Learning-enhanced Toolbox for Bayesian 21-cm Data Analysis and Constraints on the Astrophysics of the Early Universe
… (global) 21-cm experiments and is based on seven first author papers. The topic is introduced in Part I, with the scientific background of the global 21-cm signal, the challenges faced by experiments aiming to detect the signal and current experimental techniques and results being outlined. Part …
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Quasars at the High Redshift Frontier
In recent years the formation of primordial galaxies, cosmic metal enrichment, and hydrogen reionisation have been studied using both refined observations and powerful numerical simulations. High-redshift quasars have become a ubiquitous tool in the study of this era with more than 115 quasars now …