TY - JOUR
T1 - A direct measure of free electron gas via the kinematic Sunyaev-Zel'dovich effect in Fourier-space analysis
AU - Sugiyama, Naonori S.
AU - Okumura, Teppei
AU - Spergel, David N.
N1 - Funding Information:
We are grateful to Chiaki Hikage, Maresuke Shiraishi, Akito Kusaka, Shun Saito, HironaoMiyatake, Masamune Oguri, Daisuke Nagai, Masato Shirasaki, and Eiichiro Komatsu for very useful discussion. NSS acknowledges financial support from Grant-in-Aid for JSPS Fellows (No. 28-1890). NSS further acknowledges financial support from Grant-in-Aid for Scientific Research from the JSPS Promotion of Science (25287050) and from a NEXT project 'Priority issue 9 to be tackled by using post-K computer'. The Flatiron Institute is supported by the Simons Foundation. Numerical computations were carried out on Cray XC30 at Center for Computational Astrophysics, National Astronomical Observatory of Japan. We thank the LGMCA team for publicly releasing their CMB maps. Some of the results in this paper have been derived using the HEALPIX package (Górski et al. 2005). Linear matter power spectra and CMB temperature power spectra used in this paper are generated with CLASS (Lesgourgues 2011). Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III web site is ttp://www.sdss3.org/. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, Carnegie Mellon University, University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the 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, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University. Based on observations obtained with Planck (http://www.esa.int/Planck), an ESA science mission with instruments and contributions directly funded by ESA Member States, NASA, and Canada.
Publisher Copyright:
© 2017 The Authors.
PY - 2018/4
Y1 - 2018/4
N2 - We present the measurement of the kinematic Sunyaev-Zel'dovich (kSZ) effect in Fourier space, rather than in real space. We measure the density-weighted pairwise kSZ power spectrum, the first use of this promising approach, by cross-correlating a cleaned cosmicmicrowave background (CMB) temperature map, which jointly uses both Planck Release 2 and Wilkinson Microwave Anisotropy Probe nine-year data, with the two galaxy samples, CMASS and LOWZ, derived from the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12. To estimate the CMB temperature distortion associated with each galaxy, we apply an aperture photometry filter. With the current data, we constrain the average optical depth τ multiplied by the ratio of the Hubble parameter at redshift z and the present day, E = H/H0; we find τE = (3.95 ± 1.62) × 10-5 for LOWZ, which corresponds to the statistical significance of S/N = 2.44, and τE = (1.25 ± 1.06) × 10-5 for CMASS, which is consistent with a null hypothesis of no signal. While this analysis results in the kSZ signals with only evidence for a detection, the combination of future CMB and spectroscopic galaxy surveys should enable precision measurements. We estimate that the combination of CMB-S4 and data from Dark Energy Spectroscopic Instrument should yield detections of the kSZ signal with S/N = 70-100, depending on the resolution of CMB-S4.
AB - We present the measurement of the kinematic Sunyaev-Zel'dovich (kSZ) effect in Fourier space, rather than in real space. We measure the density-weighted pairwise kSZ power spectrum, the first use of this promising approach, by cross-correlating a cleaned cosmicmicrowave background (CMB) temperature map, which jointly uses both Planck Release 2 and Wilkinson Microwave Anisotropy Probe nine-year data, with the two galaxy samples, CMASS and LOWZ, derived from the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12. To estimate the CMB temperature distortion associated with each galaxy, we apply an aperture photometry filter. With the current data, we constrain the average optical depth τ multiplied by the ratio of the Hubble parameter at redshift z and the present day, E = H/H0; we find τE = (3.95 ± 1.62) × 10-5 for LOWZ, which corresponds to the statistical significance of S/N = 2.44, and τE = (1.25 ± 1.06) × 10-5 for CMASS, which is consistent with a null hypothesis of no signal. While this analysis results in the kSZ signals with only evidence for a detection, the combination of future CMB and spectroscopic galaxy surveys should enable precision measurements. We estimate that the combination of CMB-S4 and data from Dark Energy Spectroscopic Instrument should yield detections of the kSZ signal with S/N = 70-100, depending on the resolution of CMB-S4.
KW - Cosmic background radiation
KW - Cosmology: observations
KW - Cosmology: theory
KW - Intergalactic medium
KW - Large-scale structure of Universe
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U2 - 10.1093/mnras/stx3362
DO - 10.1093/mnras/stx3362
M3 - Article
AN - SCOPUS:85045920975
SN - 0035-8711
VL - 475
SP - 3764
EP - 3785
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -