Format:
xi, 155 Seiten
,
Illustrationen, Diagramme
Content:
In the current paradigm of cosmology, the formation of large-scale structures is mainly driven by non-radiating dark matter, making up the dominant part of the matter budget of the Universe. Cosmological observations however, rely on the detection of luminous galaxies, which are biased tracers of the underlying dark matter. In this thesis I present cosmological reconstructions of both, 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 relying on a statistical approach, in which a given galaxy catalogue is interpreted as a biased realization of the underlying dark matter density field. The inference is computationally performed on a mesh grid by sampling from a probability density function, which describes the joint posterior distribution of matter density and the three dimensional velocity field.…
Note:
Dissertation Universität Potsdam, Mathematisch-Naturwissenschaftliche Fakultät 2017
Additional Edition:
Erscheint auch als Online-Ausgabe Ata, Metin Phase-space reconstructions of cosmic velocities and the cosmic web Potsdam, 2017
Language:
English
Keywords:
Dunkle Materie
;
Radioastronomie
;
Kosmologische Rotverschiebung
;
Geschwindigkeitsverteilung
;
Computersimulation
;
Markov-Ketten-Monte-Carlo-Verfahren
;
Störungstheorie
;
Hochschulschrift
Author information:
Müller, Volker 1949-
