Format:
152 Seiten
,
Illustrationen, Diagramme
Content:
Most of the matter in the universe consists of hydrogen. The hydrogen in the intergalactic medium (IGM), the matter between the galaxies, underwent a change of its ionisation state at the epoch of reionisation, at a redshift roughly between 6〉z〉10, or ~10^8 years after the Big Bang. At this time, the mostly neutral hydrogen in the IGM was ionised but the source of the responsible hydrogen ionising emission remains unclear. In this thesis I discuss the most likely candidates for the emission of this ionising radiation, which are a type of galaxy called Lyman alpha emitters (LAEs). As implied by their name, they emit Lyman alpha radiation, produced after a hydrogen atom has been ionised and recombines with a free electron. The ionising radiation itself (also called Lyman continuum emission) which is needed for this process inside the LAEs could also be responsible for ionising the IGM around those galaxies at the epoch of reionisation, given that enough Lyman continuum escapes. Through this mechanism, Lyman alpha and Lyman continuum ...
Note:
Dissertation Universität Potsdam 2020
Additional Edition:
Erscheint auch als Online-Ausgabe Kerutt, Josephine Victoria The high-redshift voyage of Lyman alpha and Lyman continuum emission as told by MUSE Potsdam, 2019
Language:
English
Keywords:
Intergalaktische Materie
;
Lyman-Alpha-Strahlung
;
Kosmologische Rotverschiebung
;
Hochschulschrift
Author information:
Wisotzki, Lutz
