Constraining general relativity and the galaxy-halo connection by the redshift-space distortion in the BOSS galaxy

2014 Fiscal Year Final Research Report

• Project/Area Number: 25887012
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Astronomy
• Research Institution: The University of Tokyo
• Principal Investigator: SAITO SHUN 東京大学, カブリ数物連携宇宙研究機構, 特任研究員 (10704215)
• Project Period (FY): 2013-08-30 – 2015-03-31
• Keywords: 宇宙大規模構造 / 宇宙論 / 銀河サーベイ / 赤方偏移歪み

Outline of Final Research Achievements

We constrained general relativity at cosmological scales by making use of the redshift-space distortion over a wide range of scales in the three-dimensional clustering of galaxies observed in Baryon Oscillation Spectroscopic Survey (BOSS) in Sloan Digital Sky Survey III (SDSS-III, 2009-2014). We find no evidence of violation in general relativity and also derive a stringent constraint on neutrino masses. Through the research, we develop a way to predict the distribution of dark matter halos, and also develop a novel way to connect simulated dark matter halos with the observed BOSS galaxies.

Free Research Field

観測的宇宙論