Video URL
https://pirsa.org/18090041VIPERS: Probing the growth of structure at z~1
APA
Mohammad, F. (2018). VIPERS: Probing the growth of structure at z~1. Perimeter Institute for Theoretical Physics. https://pirsa.org/18090041
MLA
Mohammad, Faizan. VIPERS: Probing the growth of structure at z~1. Perimeter Institute for Theoretical Physics, Sep. 18, 2018, https://pirsa.org/18090041
BibTex
@misc{ scivideos_PIRSA:18090041, doi = {10.48660/18090041}, url = {https://pirsa.org/18090041}, author = {Mohammad, Faizan}, keywords = {Cosmology}, language = {en}, title = {VIPERS: Probing the growth of structure at z~1}, publisher = {Perimeter Institute for Theoretical Physics}, year = {2018}, month = {sep}, note = {PIRSA:18090041 see, \url{https://scivideos.org/index.php/pirsa/18090041}} }
Faizan Mohammad British Columbia Ferry Services Inc
Abstract
In galaxy redshift surveys, the line-of-sight velocity information is encoded in the observed redshift as a Doppler component that radially distorts the galaxy positions. The linear component of such `Redshift-Space Distortions' (RSD) is directly proportional to the growth rate of structure, f(z), and motivates the interest in RSD as a powerful way to constrain gravity. However, the non-linear evolution of the density and velocity fields requires the use of sophisticated theoretical models to extract reliable cosmological information from quasi-linear scales. Alternatively, one can use tracers of the LSS less sensitive to the non-linear motions at small scales. After an overview of VIPERS I will present a novel method that uses the clustering of luminous blue galaxies to obtain an accurate estimate of the growth rate while keeping the theoretical model relatively simple.