PIRSA:18090041

VIPERS: Probing the growth of structure at z~1

APA

Mohammad, F. (2018). VIPERS: Probing the growth of structure at z~1. Perimeter Institute. https://pirsa.org/18090041

MLA

Mohammad, Faizan. VIPERS: Probing the growth of structure at z~1. Perimeter Institute, Sep. 18, 2018, https://pirsa.org/18090041

BibTex

          @misc{ pirsa_18090041,
            doi = {},
            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},
            year = {2018},
            month = {sep},
            note = {PIRSA:18090041 see, \url{https://pirsa.org}}
          }
          

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.