A gravitational lensing detection of filamentary structures connecting luminous red galaxies

Qianli Xia; Naomi Robertson; Catherine Heymans; Alexandra Amon; Marika Asgari; Yan-Chuan Cai; Thomas Erben; Joachim Harnois-Déraps; Hendrik Hildebrandt; Arun Kannawadi; Konrad Kuijken; Peter Schneider; Cristóbal Sifón; Tilman Tröster; Angus H. Wright

doi:10.1051/0004-6361/201936678

A gravitational lensing detection of filamentary structures connecting luminous red galaxies

Qianli Xia, Naomi Robertson, Catherine Heymans, Alexandra Amon, Marika Asgari, Yan-Chuan Cai, Thomas Erben, Joachim Harnois-Déraps, Hendrik Hildebrandt, Arun Kannawadi, Konrad Kuijken, Peter Schneider, Cristóbal Sifón, Tilman Tröster, Angus H. Wright

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract / Description of output

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 3−5h−1Mpc is chosen as a proxy for the location of filaments. We measure 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 report 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 is found to be 15±4 times the critical density.

Original language	English
Article number	A89
Number of pages	12
Journal	Astronomy & Astrophysics
Volume	633
DOIs	https://doi.org/10.1051/0004-6361/201936678
Publication status	Published - 15 Jan 2020

Keywords / Materials (for Non-textual outputs)

astro-ph.CO

Access to Document

10.1051/0004-6361/201936678

1909.05852Accepted author manuscript, 1.45 MB

https://www.aanda.org/articles/aa/abs/2020/01/aa36678-19/aa36678-19.html

GLOBE: Global Lensing Observations to go Beyond Einstein (027451/1)
Heymans, C.
EU government bodies
1/11/15 → 31/10/21
Project: Research

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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., & Wright, A. H. (2020). A gravitational lensing detection of filamentary structures connecting luminous red galaxies. Astronomy & Astrophysics, 633, Article A89. https://doi.org/10.1051/0004-6361/201936678

@article{a2663427c35f471093ea7229ebb05969,

title = "A gravitational lensing detection of filamentary structures connecting luminous red galaxies",

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 3−5h−1Mpc is chosen as a proxy for the location of filaments. We measure 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 report 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 is found to be 15±4 times the critical density. ",

keywords = "astro-ph.CO",

author = "Qianli Xia and Naomi Robertson and Catherine Heymans and Alexandra Amon and Marika Asgari and Yan-Chuan Cai and Thomas Erben and Joachim Harnois-D{\'e}raps and Hendrik Hildebrandt and Arun Kannawadi and Konrad Kuijken and Peter Schneider and Crist{\'o}bal Sif{\'o}n and Tilman Tr{\"o}ster and Wright, {Angus H.}",

note = "13 pages, 8 figures, accepted for publication in A&A",

year = "2020",

month = jan,

day = "15",

doi = "10.1051/0004-6361/201936678",

language = "English",

volume = "633",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

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 & Wright, AH 2020, 'A gravitational lensing detection of filamentary structures connecting luminous red galaxies', Astronomy & Astrophysics, vol. 633, A89. https://doi.org/10.1051/0004-6361/201936678

TY - JOUR

T1 - A gravitational lensing detection of filamentary structures connecting luminous red galaxies

AU - Xia, Qianli

AU - Robertson, Naomi

AU - Heymans, Catherine

AU - Amon, Alexandra

AU - Asgari, Marika

AU - Cai, Yan-Chuan

AU - Erben, Thomas

AU - Harnois-Déraps, Joachim

AU - Hildebrandt, Hendrik

AU - Kannawadi, Arun

AU - Kuijken, Konrad

AU - Schneider, Peter

AU - Sifón, Cristóbal

AU - Tröster, Tilman

AU - Wright, Angus H.

N1 - 13 pages, 8 figures, accepted for publication in A&A

PY - 2020/1/15

Y1 - 2020/1/15

N2 - 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 3−5h−1Mpc is chosen as a proxy for the location of filaments. We measure 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 report 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 is found to be 15±4 times the critical density.

AB - 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 3−5h−1Mpc is chosen as a proxy for the location of filaments. We measure 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 report 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 is found to be 15±4 times the critical density.

KW - astro-ph.CO

U2 - 10.1051/0004-6361/201936678

DO - 10.1051/0004-6361/201936678

M3 - Article

SN - 0004-6361

VL - 633

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

M1 - A89

ER -

A gravitational lensing detection of filamentary structures connecting luminous red galaxies

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GLOBE: Global Lensing Observations to go Beyond Einstein (027451/1)

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