paper

The power spectrum and bispectrum of SDSS DR11 BOSS galaxies I: bias and gravity

arXiv:1407.5668 · doi:10.1093/mnras/stv961

Abstract

We analyse the anisotropic clustering of the Baryon Oscillation Spectroscopic Survey (BOSS) CMASS Data Release 11 sample, which consists of galaxies in the redshift range and has a sky coverage of deg corresponding to an effective volume of . We fit the Fourier space statistics, the power spectrum and bispectrum monopoles to measure the linear and quadratic bias parameters, and , for a non-linear non-local bias model, the growth of structure parameter and the amplitude of dark matter density fluctuations parametrised by . We obtain and at the effective redshift of the survey, . The main cosmological result is the constraint on the combination , which is complementary to constraints obtained from 2-point redshift space distortion analyses. A less conservative analysis yields . We ensure that our result is robust by performing detailed systematic tests using a large suite of survey galaxy mock catalogs and N-body simulations. The constraints on are useful for setting additional constrains on neutrino mass, gravity, curvature as well as the number of neutrino species from galaxy surveys analyses (as presented in a companion paper).

45 pages, 22 figures, Accepted for publication in MNRAS

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