eprintid: 14316
rev_number: 10
eprint_status: archive
userid: 292
dir: disk0/00/01/43/16
datestamp: 2013-01-16 08:34:51
lastmod: 2013-02-25 08:26:05
status_changed: 2013-01-16 08:34:51
type: doctoralThesis
metadata_visibility: show
creators_name: Valente, Ana
title: On the cross-correlation between weak gravitational lensing and the Sunyaev-Zel'dovich effect
subjects: ddc-530
divisions: i-130001
adv_faculty: af-13
abstract: The distribution and evolution of cosmic structures, in their dark and baryonic components, remains a
source of uncertainty in the current model of the Universe and is an active field of research. To address this
subject, we cross-correlate the weak gravitational lensing and thermal Sunyaev-Zel’dovich effects of galaxy
clusters as a function of redshift. We use the halo model of large-scale structure to estimate the two-point
correlation function between the dark matter density and the gas pressure in halos. After obtaining the
three-dimensional power spectrum and projecting it onto the sky by means of Limber’s approximation, we
estimate how the cross-correlation between these two types of data builds up as redshift increases. We
calculate the covariance matrix for a measured cross-correlation function and evaluate expected error bars
for realistic surveys. Further, we examine how the choice of cosmological parameters affects our results
and inspect the influence of cluster properties on the cross-correlation signal. We find that, although the
cross-correlation signal does not seem to be suitable for constraining cosmological parameters, it is highly
sensitive to the intrinsic properties of the clusters and thus provides a way to characterise the evolution of
the halo gas component.
date: 2013-01-11
id_scheme: DOI
id_number: 10.11588/heidok.00014316
ppn_swb: 1652049444
own_urn: urn:nbn:de:bsz:16-heidok-143169
date_accepted: 2012-12-19
advisor: HASH(0x55e0f5788198)
language: eng
bibsort: VALENTEANAONTHECROSS20130111
full_text_status: public
citation:   Valente, Ana  (2013) On the cross-correlation between weak gravitational lensing and the Sunyaev-Zel'dovich effect.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/14316/1/PhDthesis_Valente.pdf