The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: RSD measurement from the LOS-dependent power spectrum of DR12 BOSS galaxies

DOI: 
10.1093/mnras/stw1096
Publication date: 
01/08/2016
Main author: 
Gil-Marín, Héctor
IAA authors: 
Prada, Francisco
Authors: 
Gil-Marín, Héctor;Percival, Will J.;Brownstein, Joel R.;Chuang, Chia-Hsun;Grieb, Jan Niklas;Ho, Shirley;Shu Kitaura, Francisco-;Maraston, Claudia;Prada, Francisco;Rodríguez-Torres, Sergio;Ross, Ashley J.;Samushia, Lado;Schlegel, David J.;Thomas, Daniel;Tinker, Jeremy L.;Zhao, Gong-Bo
Journal: 
Monthly Notices of the Royal Astronomical Society
Refereed: 
Yes
Publication type: 
Article
Pages: 
4188-4209
Abstract: 
We measure and analyse the clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) relative to the line-of-sight (LOS), for LOWZ and CMASS galaxy samples drawn from the final Data Release 12 (DR12). The LOWZ sample contains 361 762 galaxies with an effective redshift of z<SUB>lowz</SUB> = 0.32, and the CMASS sample 777 202 galaxies with an effective redshift of z<SUB>cmass</SUB> = 0.57. From the power spectrum monopole and quadrupole moments around the LOS, we measure the growth of structure parameter f times the amplitude of dark matter density fluctuations σ<SUB>8</SUB> by modeling the Redshift-Space Distortion signal. When the geometrical Alcock-Paczynski effect is also constrained from the same data, we find joint constraints on fσ<SUB>8</SUB>, the product of the Hubble constant and the comoving sound horizon at the baryon drag epoch H(z)r<SUB>s</SUB>(z<SUB>d</SUB>), and the angular distance parameter divided by the sound horizon D<SUB>A</SUB>(z)/r<SUB>s</SUB>(z<SUB>d</SUB>). We find f(z<SUB>lowz</SUB>)σ<SUB>8</SUB>(z<SUB>lowz</SUB>) = 0.394 ± 0.062, D<SUB>A</SUB>(z<SUB>lowz</SUB>)/r<SUB>s</SUB>(z<SUB>d</SUB>) = 6.35 ± 0.19, H(z<SUB>lowz</SUB>)r<SUB>s</SUB>(z<SUB>d</SUB>) = (11.41 ± 0.56) 10<SUP>3</SUP>kms<SUP>-1</SUP> for the LOWZ sample, and f(z<SUB>cmass</SUB>)σ<SUB>8</SUB>(z<SUB>cmass</SUB>) = 0.444 ± 0.038, D<SUB>A</SUB>(z<SUB>cmass</SUB>)/r<SUB>s</SUB>(z<SUB>d</SUB>) = 9.42 ± 0.15, H(z_cmass)r_s(z_d)=(13.92 ± 0.44) {10^3km}s^{-1} for the CMASS sample. We find general agreement with previous BOSS DR11 measurements. Assuming the Hubble parameter and angular distance parameter are fixed at fiducial ΛCDM values, we find f(z<SUB>lowz</SUB>)σ<SUB>8</SUB>(z<SUB>lowz</SUB>) = 0.485 ± 0.044 and f(z<SUB>cmass</SUB>)σ<SUB>8</SUB>(z<SUB>cmass</SUB>) = 0.436 ± 0.022 for the LOWZ and CMASS samples, respectively.
Database: 
ADS
SCOPUS
WOK
URL: 
https://ui.adsabs.harvard.edu/#abs/2016MNRAS.460.4188G/abstract
ADS Bibcode: 
2016MNRAS.460.4188G
Keywords: 
cosmology: theory - cosmology: cosmological parameters - cosmology: large-scale structure of Universe - galaxies: haloes;Astrophysics - Cosmology and Nongalactic Astrophysics