Search for dissertations about: "galaxies: high- redshift"
Showing result 1 - 5 of 33 swedish dissertations containing the words galaxies: high- redshift.
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1. Neutral gas properties of high-redshift analog galaxies : 21cm observations of Lyα and LyC-emitting galaxies
Abstract : Neutral hydrogen (HI) is the most abundant baryonic element and a crucial component of galaxies. In the early universe, the interaction between neutral gas and the light produced by galaxies is thought to have given rise to cosmological reionization. READ MORE
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2. Galaxies in the epoch of reionization : Investigating the high-redshift galaxy population through simulations and observations
Abstract : The cosmic reionization is the last major gas phase transition in cosmic history, yet it remains poorly understood. Current constraints indicate that early star-forming galaxies drove the reionization process through producing and releasing large numbers of ionizing photons into the intergalactic medium. READ MORE
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3. Quasar host galaxies at intermediate and high redshifts
Abstract : Quasars form one of the most energetic phenomena in the universe, and can be traced out to very large redshifts. By studying the galaxies which host the active nuclei, important insights can be gained into the processes that trigger and maintain the quasar powerhouse. READ MORE
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4. Quasars and Low Surface Brightness Galaxies as Probes of Dark Matter
Abstract : Most of the matter in the Universe appears to be in some form which does not emit or absorb light. While evidence for the existence of this dark matter has accumulated over the last seventy years, its nature remains elusive. READ MORE
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5. Using Lyα to illuminate the circumgalactic medium and the Epoch of Reionization : Lessons from low redshift
Abstract : The field of extragalactic astronomy is progressing rapidly but there is still much to understand and many questions that remain open. During recent years the Lyα emission line has come to the fore as a potentially very powerful astrophysical tool and is now routinely used to find galaxies at the very highest redshifts. READ MORE