Taruya, Atsushi and Okumura, Teppei (2020) Improving Geometric and Dynamical Constraints on Cosmology with Intrinsic Alignments of Galaxies. The Astrophysical Journal, 891 (2). L42. ISSN 2041-8213
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Abstract
We show that the spatial correlation of the intrinsic alignments (IAs) of galaxies, measured in galaxy redshift surveys, offers a precision route to improve the geometrical and dynamical constraints on cosmology. The IA has been treated as a contaminant against cosmological probes such as weak gravitational lensing experiments. However, the large-scale correlation of IAs is expected to follow the coherent large-scale matter inhomogeneities. Here, making use of its anisotropic nature, we show that the large-scale IA correlations help to improve the measurements of the geometric distances and growth of structure. In combination with the conventional galaxy clustering statistics, we find that constraints on equation-of-state parameter for dark energy and Hubble parameter can be tighter than those from the clustering statistics alone by a factor of more than 1.5.
Item Type: | Article |
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Subjects: | Open Research Librarians > Physics and Astronomy |
Depositing User: | Unnamed user with email support@open.researchlibrarians.com |
Date Deposited: | 26 May 2023 07:32 |
Last Modified: | 05 Feb 2024 04:51 |
URI: | http://stm.e4journal.com/id/eprint/1036 |