期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 498, 期 3, 页码 3470-3483出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/staa2593
关键词
cosmological parameters; large scale structure of the Universe
资金
- National Key Basic Research and Development Program of China [2018YFA0404503]
- NSFC [11890691, 11925303, 11720101004, 11673025]
- Nebula Talents Program of NAOC
- CAS Interdisciplinary Innovation Team
- European Research Council [670193]
- WFIRST program [NNG26PJ30C, NNN12AA01C]
- National Research Foundation of Korea (NRF) - Korean Ministry of Education, Science and Technology (MoEST) [2017R1E1A1A01077508, 2020R1A2C1005655]
- Sejong University
- Alfred P. Sloan Foundation
- US Department of Energy Office of Science
- Center for HighPerformance Computing at the University of Utah
- ICG
- SEPNet
- University of Portsmouth
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- STFC [ST/R000972/1, ST/S000550/1] Funding Source: UKRI
We perform a multitracer analysis using the complete Sloan Digital Sky Survey IV (SDSS-IV) extended Baryon Oscillation Spectroscopic Survey (eBOSS) DR16 luminous red galaxy (LRG) and the DR16 emission-line galaxy (ELG) samples in the configuration space, and successfully detect a cross-correlation between the two samples, and find the growth rate to be f sigma(8)=0.342 +/- 0.085 (similar to 25 per cent accuracy) from the cross-sample alone. We perform a joint measurement of the baryonic acoustic oscillation (BAO) and redshift space distortion (RSD) parameters at a single effective redshift of z(eff) = 0.77, using the autocorrelation and cross-correlation functions of the LRG and ELG samples, and find that the comoving angular diameter distance D-M(z(eff))/r(d) = 18.85 +/- 0.38, the Hubble distance D-H(z(eff))/r(d) = 19.64 +/- 0.57, and f sigma(8)(z(eff)) = 0.432 +/- 0.038, which is consistent with a Lambda CDM model at 68 per cent CL. Compared to the single-tracer analysis on the LRG sample, the Figure of Merit of alpha(perpendicular to), alpha(parallel to), and f sigma(8) is improved by a factor of 1.11 in our multitracer analysis, and in particular, the statistical uncertainty of f sigma(8) is reduced by 11.6 percent.
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