Will kinematic SunyaevZel'dovich measurements enhance the science return from galaxy redshift surveys?
Abstract
Yes. Future CMB experiments such as Advanced ACTPol and CMBS4 should achieve measurements with S/N of > 0.1 for the typical host halo of galaxies in redshift surveys. These measurements will provide complementary measurements of the growth rate of large scale structure f and the expansion rate of the Universe H to galaxy clustering measurements. This paper emphasizes that there is significant information in the anisotropy of the relative pairwise kSZ measurements. We expand the relative pairwise kSZ power spectrum in Legendre polynomials and consider up to its octopole. Assuming that the noise in the filtered maps is uncorrelated between the positions of galaxies in the survey, we derive a simple analytic form for the power spectrum covariance of the relative pairwise kSZ temperature in redshift space. While many previous studies have assumed optimistically that the optical depth of the galaxies τ_{T} in the survey is known, we marginalize over τ_{T}, to compute constraints on the growth rate f and the expansion rate H. For realistic survey parameters, we find that combining kSZ and galaxy redshift survey data reduces the marginalized 1σ errors on H and f to ~5070% compared to the galaxyonly analysis.
 Publication:

Journal of Cosmology and Astroparticle Physics
 Pub Date:
 January 2017
 DOI:
 10.1088/14757516/2017/01/057
 arXiv:
 arXiv:1606.06367
 Bibcode:
 2017JCAP...01..057S
 Keywords:

 Astrophysics  Cosmology and Nongalactic Astrophysics;
 Astrophysics  Astrophysics of Galaxies;
 General Relativity and Quantum Cosmology
 EPrint:
 25 pages, 7 figures