Margot M. Brouwer, Leiden University
Marcello Cacciato, Leiden University
Andrej Dvornik, Leiden University
Lizzie Eardley, University of Edinburgh
Catherine Heymans, University of Edinburgh
Henk Hoekstra, Leiden University
Konrad Kuijken, Leiden University
Tamsyn McNaught-Roberts, Durham University
Cristobal Sifon, Leiden University
Massimo Viola, Leiden University
Mehmet Alpaslan, NASA Ames Research Center
Maciej Bilicki, Leiden University
Joss Bland-Hawthorn, University of Sydney
Sarah Brough, Australian Astronomical Observatory
Ami Choi, University of Edinburgh
Simon P. Driver, University of Western Australia
Thomas Erben, Argelander-Institut fur Astronomie
Aniello Grado, INAF-Osservatorio Astronomico di Capodimonte
Hendrik Hildebrandt, Argelander-Institut fur Astronomie
Benne W. Holwerda, University of Louisville
Andrew M. Hopkins, Australian Astronomical Observatory
Jelte T. A. de Jong, Leiden University
Jochen Liske, Universitat Hamburg
John McFarland, University of Groningen
Reiko Nakajima, Argelander-Institut fur Astronomie
Nicola R. Napolitano, INAF-Osservatorio Astronomico di Capodimonte
Peder Norberg, Durham University
John A. Peacock, University of Edinburgh
Mario Radovich, INAF-Osservatorio Astronomico di Capodimonte
Aaron S. G. Robotham, University of Western Australia
Peter Schneider, Argelander-Institut fur Astronomie
Gert Sikkema, University of Groningen
Edo van Uitert, University College London
Gijs Verdoes Kleijn, University of Groningen
Edwin A. Valentijn, University of Groningen

Document Type


Publication Date



Physics and Astronomy


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" role="presentation" style="box-sizing: border-box; margin: 0px; padding: 0px; border: 0px; font-variant: inherit; font-stretch: inherit; line-height: normal; font-family: inherit; vertical-align: baseline; display: inline-table; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; position: relative;">∼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.


This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society Copyright: 2016. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

Original Publication Information

Brouwer, Margot M., et al. "Dependence of GAMA Galaxy Halo Masses on the Cosmic Web Environment from 100 deg2 of KiDS Weak Lensing Data." 2016. Monthly Notices of the Royal Astronomical Society 462(4): 4451-4463.