期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 465, 期 2, 页码 1757-1788出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw2679
关键词
cosmological parameters; large-scale structure of Universe
资金
- Agence Nationale de la Recherche, as part of the programme Investissements d'avenir [ANR-11-IDEX-0004-02]
- UK Science and Technology Facilities Research Council [ST/M001709/1, ST/N000668/1]
- European Research Council [614030]
- UK Space Agency [ST/N00180X/1]
- ICCUB (Unidad de Excelencia Maria de Maeztu) [FPA2014-57816-P, MDM-2014-0369]
- Spanish MICINNs Consolider-Ingenio Programme [MultiDark CSD2009-00064, AYA2010-21231-C02-01]
- Comunidad de Madrid [HEPHACOS S2009/ESP-1473]
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. Department of Energy Office of Science
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- University of Cambridge
- Carnegie Mellon University
- University of Florida
- French Participation Group
- German Participation Group
- Harvard University
- Instituto de Astrofisica de Canarias
- Michigan State/Notre Dame/JINA Participation Group
- Johns Hopkins University
- Lawrence Berkeley National Laboratory
- Max Planck Institute for Astrophysics
- Max Planck Institute for Extraterrestrial Physics
- New Mexico State University
- New York University
- Ohio State University
- Pennsylvania State University
- University of Portsmouth
- Princeton University
- Spanish Participation Group
- University of Tokyo
- University of Utah
- Vanderbilt University
- University of Virginia
- University of Washington
- Yale University
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- ICG
- SEP-Net
- Science and Technology Facilities Council [ST/N000668/1] Funding Source: researchfish
- UK Space Agency [ST/N00180X/1] Funding Source: researchfish
- ICREA Funding Source: Custom
- STFC [ST/N000668/1] Funding Source: UKRI
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 z(LOWZ) = 0.32, and the CMASS sample contains 777 202 galaxies with an effective redshift of z(CMASS) = 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, f, and the amplitude of dark matter density fluctuations, sigma(8), 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(z(d)), and the angular distance parameter divided by the sound horizon, D-A(z)/r(s)(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 f(z(LOWZ))sigma(8)(z(LOWZ)) = 0.427 +/- 0.056, D-A(z(LOWZ))/r(s)(z(d)) = 6.60 +/- 0.13, H(z(LOWZ))r(s)(z(d)) = (11.55 +/- 0.38) 103 km s(-1) for the LOWZ sample, and f(z(CMASS))sigma(8)(z(CMASS)) = 0.426 +/- 0.029, D-A(z(CMASS))/r(s)(z(d)) = 9.39 +/- 0.10, H(z(CMASS))r(s)(z(d)) = (14.02 +/- 0.22) 103 km s-1 for the CMASS sample. 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 gamma-parametrization finding gamma = 0.733(-0.069)(+0.068), which is similar to 2.7 sigma away from the General Relativity predictions.
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