TY - JOUR
T1 - Dependence of GAMA galaxy halo masses on the cosmic web environment from 100 deg2 of KiDS weak lensing data
AU - Brouwer, Margot M.
AU - Cacciato, Marcello
AU - Dvornik, Andrej
AU - Eardley, Lizzie
AU - Heymans, Catherine
AU - Hoekstra, Henk
AU - Kuijken, Konrad
AU - McNaught-Roberts, Tamsyn
AU - Sifón, Cristóbal
AU - Viola, Massimo
AU - Alpaslan, Mehmet
AU - Bilicki, Maciej
AU - Bland-Hawthorn, Joss
AU - Brough, Sarah
AU - Choi, Ami
AU - Driver, Simon P.
AU - Erben, Thomas
AU - Grado, Aniello
AU - Hildebrandt, Hendrik
AU - Holwerda, Benne W.
AU - Hopkins, Andrew M.
AU - de Jong, Jelte T. A.
AU - Liske, Jochen
AU - McFarland, John
AU - Nakajima, Reiko
AU - Napolitano, Nicola R.
AU - Norberg, Peder
AU - Peacock, John A.
AU - Radovich, Mario
AU - Robotham, Aaron S. G.
AU - Schneider, Peter
AU - Sikkema, Gert
AU - van Uitert, Edo
AU - Kleijn, Gijs Verdoes
AU - Valentijn, Edwin A.
N1 - CH, MV, MC, HHo, CS and AC acknowledge support from the European Research Council under FP7 grant number 279396 (MV, MC, CS, HHo), grant number 240185 (AC and CH) and grant number G47112 (CH). MV acknowledges support from the Netherlands Organisation for Scientific Research (NWO) through grants 614.001.103. HHi is supported by an Emmy Noether grant (No. Hi 1495/2-1) of the Deutsche Forschungsgemeinschaft. RN acknowledges support from the German Federal Ministry for Economic Affairs and Energy (BMWi) provided via DLR under project no. 50QE1103. TM-R and PN acknowledge support from an European Research Council Starting Grant (DEGAS-259586). This work is supported by the Deutsche Forschungsgemeinschaft in the framework of the TR33 ‘The Dark Universe’. GVK acknowledges financial support from the Netherlands Research School for Astronomy (NOVA) and Target. Target is supported by Samenwerkingsverband Noord Nederland, European fund for regional development, Dutch Ministry of economic affairs, Pieken in de Delta, Provinces of Groningen and Drenthe. EvU acknowledges support from an STFC Ernest Rutherford Research Grant, grant reference ST/L00285X/1.
PY - 2016/11/11
Y1 - 2016/11/11
N2 - 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 ~100 deg2 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.
AB - 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 ~100 deg2 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.
KW - Gravitational lensing: weak
KW - Methods: statistical
KW - Surveys
KW - Galaxies: haloes
KW - Dark matter
KW - Large-scale structure of Universe
U2 - 10.1093/mnras/stw1602
DO - 10.1093/mnras/stw1602
M3 - Article
AN - SCOPUS:84994515505
SN - 0035-8711
VL - 462
SP - 4451
EP - 4463
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -