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

Journal Article · · Monthly Notices of the Royal Astronomical Society
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8]
  1. Sorbonne Univ, Paris (France). Inst. Lagrange de Paris; Univ. Pierre et Marie Curie, Paris (France). Lab. de Physique Nucleaire et de Hautes Energies; Univ. of Portsmouth (United Kingdom). Inst. of Cosmology & Gravitation
  2. Univ. of Portsmouth (United Kingdom). Inst. of Cosmology & Gravitaiton
  3. Harvard Univ., Cambridge, MA (United States). Radcliffe Inst. for Advanced Study; Univ. of Oslo (Norway). Inst. of Theoretical Astrophysics; Univ. de Barcelona (Spain). ICREA & Inst. de Ciencies del Cosmos
  4. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Physics and Astronomy
  5. Leibniz Inst. fur Astrophysik Potsdam (AIP) (Germany); Univ. Autonoma de Madrid (Spain). Dept. de Fisica Teorica
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Dept. of Physics and Astronomy; Leibniz Inst. fur Astrophysik Potsdam (AIP) (Germany)
  7. Univ. Autonoma de Madrid (Spain). Dept. de Fisica Teorica; Univ. Autonoma de Madrid (Spain). Dept. de Fisica Teorica, Campus of International Excellence
  8. King's College, PA (United States). Dept. of Chemistry and Physics
+ Show Author Affiliations

In this paper, we measure and analyse the bispectrum of the final data release 12 (DR12), galaxy sample provided by the Baryon Oscillation Spectroscopic Survey, splitting by selection algorithm into LOWZ and CMASS galaxies. The LOWZ sample contains 361 762 galaxies with an effective redshift of zLOWZ = 0.32, and the CMASS sample contains 777 202 galaxies with an effective redshift of zCMASS = 0.57. Combining the power spectrum, measured relative to the line of sight, with the spherically averaged bispectrum, we are able to constrain the product of the growth of structure parameter, ƒ, and the amplitude of dark matter density fluctuations, σ8, along with the geometric Alcock–Paczynski parameters, the product of the Hubble constant and the comoving sound horizon at the baryon drag epoch, H(z)rs(zd), and the angular distance parameter divided by the sound horizon, DA(z)/rs(zd). After combining pre-reconstruction RSD analyses of the power spectrum monopole, quadrupole and bispectrum monopole with post-reconstruction analysis of the BAO power spectrum monopole and quadrupole, we find ƒ(zLOWZ)σ8(zLOWZ) = 0.427 ± 0.056, DA(zLOWZ)/rs(zd) = 6.60 ± 0.13, H(zLOWZ)rs(zd) = (11.55 ± 0.38)103 km s-1 for the LOWZ sample, and f(zCMASS)σ8(zCMASS) = 0.426 ± 0.029, DA(zCMASS)/rs(zd) = 9.39 ± 0.10, H(zCMASS)rs(zd) = (14.02 ± 0.22)103 km s-1 for the CMASS sample. In conclusion, we find general agreement with previous Baryon Oscillation Spectroscopic Survey DR11 and DR12 measurements. Combining our data set with Planck15 we perform a null test of General Relativity through the γ-parametrization finding γ=0.733$$ ^{+0.068}_{-0.069} $$, which is ∼2.7σ away from the General Relativity predictions.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1526271
Journal Information:
Monthly Notices of the Royal Astronomical Society, Vol. 465, Issue 2; ISSN 0035-8711
Publisher:
Royal Astronomical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 225 works
Citation information provided by
Web of Science

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Understanding higher-order nonlocal halo bias at large scales by combining the power spectrum with the bispectrum text January 2014
The power spectrum and bispectrum of SDSS DR11 BOSS galaxies I: bias and gravity text January 2014
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Planck 2015 results. XIII. Cosmological parameters text January 2015
Non-local bias in the halo bispectrum with primordial non-Gaussianity text January 2015
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79 ASTRONOMY AND ASTROPHYSICS
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