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

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

13 Scopus citations

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.

Original language	English (US)
Article number	A89
Journal	Astronomy and Astrophysics
Volume	633
DOIs	https://doi.org/10.1051/0004-6361/201936678
State	Published - Jan 1 2020
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Cosmology: observations
Dark matter
Gravitational lensing: weak
Large-scale structure of Universe

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10.1051/0004-6361/201936678

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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 and Astrophysics, 633, Article A89. https://doi.org/10.1051/0004-6361/201936678

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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 - 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.",

keywords = "Cosmology: observations, Dark matter, Gravitational lensing: weak, Large-scale structure of Universe",

author = "Qianli Xia and Naomi Robertson and Catherine Heymans and Alexandra Amon and Marika Asgari and Cai, {Yan Chuan} 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 = "Publisher Copyright: {\textcopyright} ESO 2020.",

year = "2020",

month = jan,

day = "1",

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

language = "English (US)",

volume = "633",

journal = "Astronomy and Astrophysics",

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Xia, Q, Robertson, N, Heymans, C, Amon, A, Asgari, M, Cai, YC, 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 and 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.

PY - 2020/1/1

Y1 - 2020/1/1

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 - 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.

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 - 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.

KW - Cosmology: observations

KW - Dark matter

KW - Gravitational lensing: weak

KW - Large-scale structure of Universe

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JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A89

ER -

A gravitational lensing detection of filamentary structures connecting luminous red galaxies

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