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Dependence of GAMA galaxy halo masses on the cosmic web environment from 100 deg2 of KiDS weak lensing data

Brouwer, M.M.; Cacciato, M.; Dvornik, A.; Eardley, L.; Heymans, C.; Hoekstra, H.; Kuijken, K.; McNaught-Roberts, T.; Sifón, C.; Viola, M.; Alpaslan, M.; Bilicki, M.; Bland-Hawthorn, J.; Brough, S.; Choi, A.; Driver, S.P.; Erben, T.; Grado, A.; Hildebrandt, H.; Holwerda, B.W.; Hopkins, A.M.; de Jong, J.T.A.; Liske, J.; McFarland, J.; Nakajima, R.; Napolitano, N.R.; Norberg, P.; Peacock, J.A.; Radovich, M.; Robotham, A.S.G.; Schneider, P.; Sikkema, G.; van Uitert, E.; Verdoes Kleijn, G.; Valentijn, E.A.

Dependence of GAMA galaxy halo masses on the cosmic web environment from 100 deg2 of KiDS weak lensing data Thumbnail


M.M. Brouwer

M. Cacciato

A. Dvornik

L. Eardley

C. Heymans

H. Hoekstra

K. Kuijken

T. McNaught-Roberts

C. Sifón

M. Viola

M. Alpaslan

M. Bilicki

J. Bland-Hawthorn

S. Brough

A. Choi

S.P. Driver

T. Erben

A. Grado

H. Hildebrandt

B.W. Holwerda

A.M. Hopkins

J.T.A. de Jong

J. Liske

J. McFarland

R. Nakajima

N.R. Napolitano

J.A. Peacock

M. Radovich

A.S.G. Robotham

P. Schneider

G. Sikkema

E. van Uitert

G. Verdoes Kleijn

E.A. Valentijn


Galaxies and their dark matter haloes are part of a complex network of mass structures, collectively called the cosmic web. Using the tidal tensor prescription these structures can be classified into four cosmic environments: voids, sheets, filaments and knots. As the cosmic web may influence the formation and evolution of dark matter haloes and the galaxies they host, we aim to study the effect of these cosmic environments on the average mass of galactic haloes. To this end we measure the galaxy–galaxy lensing profile of 91 195 galaxies, within 0.039 < z < 0.263, from the spectroscopic Galaxy And Mass Assembly survey, using ∼100deg2∼100deg2 of overlapping data from the Kilo-Degree Survey. In each of the four cosmic environments we model the contributions from group centrals, satellites and neighbouring groups to the stacked galaxy–galaxy lensing profiles. After correcting the lens samples for differences in the stellar mass distribution, we find no dependence of the average halo mass of central galaxies on their cosmic environment. We do find a significant increase in the average contribution of neighbouring groups to the lensing profile in increasingly dense cosmic environments. We show, however, that the observed effect can be entirely attributed to the galaxy density at much smaller scales (within 4 h−1 Mpc), which is correlated with the density of the cosmic environments. Within our current uncertainties we find no direct dependence of galaxy halo mass on their cosmic environment.


Brouwer, M., Cacciato, M., Dvornik, A., Eardley, L., Heymans, C., Hoekstra, H., …Valentijn, E. (2016). Dependence of GAMA galaxy halo masses on the cosmic web environment from 100 deg2 of KiDS weak lensing data. Monthly Notices of the Royal Astronomical Society, 462(4), 4451-4463.

Journal Article Type Article
Acceptance Date Jul 1, 2016
Online Publication Date Jul 20, 2016
Publication Date Nov 11, 2016
Deposit Date Sep 28, 2016
Publicly Available Date Oct 6, 2016
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 462
Issue 4
Pages 4451-4463


Published Journal Article (8.8 Mb)

Copyright Statement
This article has been published in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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