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Xia, Q, Robertson, N, Heymans, C, Amon, A, Asgari, M, Cai, Y-C, Erben, T, Harnois-Déraps, J, Hildebrandt, H, Kannawadi, A, Kuijken, K, Schneider, P, Sifón, C, Tröster, T and Wright, AH (2020) A gravitational lensing detection of filamentary structures connecting luminous red galaxies. Astronomy and Astrophysics, 633. ISSN 0004-6361
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A gravitational lensing detection of filamentary structures connecting luminous red galaxies.pdf - Published Version Download (2MB) | Preview |
Abstract
We present a weak lensing detection of filamentary structures in the cosmic web, combining data from the Kilo-Degree Survey, the Red Cluster Sequence Lensing Survey, and the Canada-France-Hawaii Telescope Lensing Survey. The line connecting luminous red galaxies with a separation of 3 − 5 h−1 Mpc was chosen as a proxy for the location of filaments. We measured the average weak lensing shear around ∼11 000 candidate filaments selected in this way from the Sloan Digital Sky Survey. After nulling the shear induced by the dark matter haloes around each galaxy, we reported a 3.4σ detection of an anisotropic shear signal from the matter that connects them. Adopting a filament density profile, motivated from N-body simulations, the average density at the centre of these filamentary structures was found to be 15 ± 4 times the critical density.
| Item Type: | Article |
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| Uncontrolled Keywords: | 0201 Astronomical and Space Sciences |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Divisions: | Astrophysics Research Institute |
| Publisher: | EDP Sciences |
| Date Deposited: | 22 Jul 2020 08:35 |
| Last Modified: | 04 Sep 2021 06:58 |
| DOI or ID number: | 10.1051/0004-6361/201936678 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/13333 |
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