Cosmological Observables in Past Light-Cone

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Aliei, Saeid | 2018

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 51663 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Rahvar, Sohrab
Abstract:
One of the important concepts in cosmology is that all of the observations is done on the past light-cone. In general, cosmological linear perturbation theory is done in a particular gauge and often on spacelike hyperplanes. Then in order to link quantities calculated in perturbation theory with observables, we have to take into account effects coming from projecting these quantities onto past light-cone. We aim in this thesis to study these effects and to calculate corrections over observable quantities such as, two point correlation function and power spectrum of matter perturbations in cosmos. For a particular observational example, in the end we study clustering of structures in cosmological voids and the bias parameter of dark matter halos with matter distribution in these environments. Finally we obtain correctional effects of past ligh-cone in this particular example
Keywords:
Cosmology ; Structure Formation ; Correction Function ; Cosmological Observables ; Past Lighte-Cone