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Reference: Velander, M, Uitert, EV, Hoekstra, H et al., (2013). CFHTLenS: The relation between galaxy dark matter haloes and baryons from weak gravitational lensing. Monthly Notices of the Royal Astronomical Society, 437 (3), 2111-2136.Citable link to this page:

 

CFHTLenS: The relation between galaxy dark matter haloes and baryons from weak gravitational lensing

Abstract: We present a study of the relation between dark matter halo mass and thebaryonic content of host galaxies, quantified via luminosity and stellar mass.Our investigation uses 154 deg2 of Canada-France-Hawaii Telescope LensingSurvey (CFHTLenS) lensing and photometric data, obtained from the CFHT LegacySurvey. We employ a galaxy-galaxy lensing halo model which allows us toconstrain the halo mass and the satellite fraction. Our analysis is limited tolenses at redshifts between 0.2 and 0.4. We express the relationship betweenhalo mass and baryonic observable as a power law. For the luminosity-halo massrelation we find a slope of 1.32+/-0.06 and a normalisation of1.19+0.06-0.07x10^13 h70^-1 Msun for red galaxies, while for blue galaxies thebest-fit slope is 1.09+0.20-0.13 and the normalisation is 0.18+0.04-0.05x10^13h70^-1 Msun. Similarly, we find a best-fit slope of 1.36+0.06-0.07 and anormalisation of 1.43+0.11-0.08x10^13 h70^-1 Msun for the stellar mass-halomass relation of red galaxies, while for blue galaxies the corresponding valuesare 0.98+0.08-0.07 and 0.84+0.20-0.16x10^13 h70^-1 Msun. For red lenses, thefraction which are satellites tends to decrease with luminosity and stellarmass, with the sample being nearly all satellites for a stellar mass of 2x10^9h70^-2 Msun. The satellite fractions are generally close to zero for bluelenses, irrespective of luminosity or stellar mass. This, together with theshallower relation between halo mass and baryonic tracer, is a directconfirmation from galaxy-galaxy lensing that blue galaxies reside in lessclustered environments than red galaxies. We also find that the halo model,while matching the lensing signal around red lenses well, is prone toover-predicting the large-scale signal for faint and less massive blue lenses.This could be a further indication that these galaxies tend to be more isolatedthan assumed. [abridged]

Peer Review status:Peer reviewedPublication status:PublishedVersion:Accepted ManuscriptNotes:Copyright © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record Velander, M., van Uitert, E., Hoekstra, H., Coupon, J., Erben, T., Heymans, C., … Semboloni, E. (2013, November 30). CFHTLenS: the relation between galaxy dark matter haloes and baryons from weak gravitational lensing. Monthly Notices of the Royal Astronomical Society. Oxford University Press (OUP). is available online at: http://doi.org/10.1093/mnras/stt2013.

Bibliographic Details

Publisher: Oxford University Press

Publisher Website: http://www.oxfordjournals.org/

Publisher:

Publisher Website: http://dx.doi.org/10.1093/mnras/stt2013

Journal: Monthly Notices of the Royal Astronomical Societysee more from them

Publication Website: http://mnras.oxfordjournals.org/

Issue Date: 2013-11

pages:2111-2136Identifiers

Urn: uuid:f53e38ab-5fe1-4bda-93e2-99ac038d70ac

Source identifier: 396016

Eissn: 1365-2966

Doi: https://doi.org/10.1093/mnras/stt2013

Issn: 0035-8711 Item Description

Type: Journal article;

Version: Accepted ManuscriptKeywords: gravitational lensing: weak galaxies: haloes cosmology: observations dark matter Tiny URL: pubs:396016

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Author: Velander, M - - - Uitert, EV - - - Hoekstra, H - - - Coupon, J - - - Erben, T - - - Heymans, C - - - Hildebrandt, H - - - Kitchin

Source: https://ora.ox.ac.uk/objects/uuid:f53e38ab-5fe1-4bda-93e2-99ac038d70ac



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