Cosmology with high (z>1) redshift galaxy surveys

Repository

Cosmology with high (z>1) redshift galaxy surveys

Show simple record

dc.contributor.advisor Komatsu, Eiichiro
dc.creator Jeong, Donghui
dc.date.accessioned 2010-11-02T15:42:29Z
dc.date.accessioned 2010-11-02T15:42:45Z
dc.date.available 2010-11-02T15:42:29Z
dc.date.available 2010-11-02T15:42:45Z
dc.date.created 2010-08
dc.date.issued 2010-11-02
dc.date.submitted August 2010
dc.identifier.uri http://hdl.handle.net/2152/ETD-UT-2010-08-1781
dc.description.abstract Galaxy redshift surveys are powerful probes of cosmology. Yet, in order to fully exploit the information contained in galaxy surveys, we need to improve upon our understanding of the structure formation in the Universe. Galaxies are formed/observed at late times when the density field is no longer linear so that understanding non-linearities is essential. In this thesis, we show that, at high redshifts, we can accurately model the galaxy power spectrum in redshift space by using the standard cosmological perturbation theory. Going beyond the power spectrum, we can use the three-point function, or the bispectrum, to gain important information on the early universe as well as on the galaxy formation via measurements of primordial non-Gaussianity and galaxy bias. We show that the galaxy bispectrum is more sensitive to primordial non-Gaussianities than previously recognized, making high-redshift galaxy surveys a particularly potent probe of the physics of inflation. Weak lensing offers yet another way of probing cosmology. By cross correlating the angular position of galaxies with the shear measurement from galaxy lensing or CMB lensing, we also show that one can obtain the information on cosmological distance scale, the galaxy bias, and the primordial non Gaussianity from weak lensing method.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subject Cosmology
dc.subject High redshift galaxy surveys
dc.subject Redshift survey
dc.subject Perturbation theory
dc.subject Primordial non-Gaussianity
dc.subject Dark energy
dc.subject Inflationary universe
dc.title Cosmology with high (z>1) redshift galaxy surveys
dc.date.updated 2010-11-02T15:42:45Z
dc.contributor.committeeMember Bromm, Volker
dc.contributor.committeeMember Hill, Gary
dc.contributor.committeeMember Seljak, Uros
dc.contributor.committeeMember Shapiro, Paul
dc.description.department Astronomy
dc.type.genre thesis
dc.type.material text
thesis.degree.department Astronomy
thesis.degree.discipline Astronomy
thesis.degree.grantor University of Texas at Austin
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy

Files in this work

Download File: JEONG-DISSERTATION.pdf
Size: 9.074Mb
Format: application/pdf

This work appears in the following Collection(s)

Show simple record


Advanced Search

Browse

My Account

Statistics

Information