Quick Search:

uzh logo
Browse by:
bullet
bullet
bullet
bullet

Zurich Open Repository and Archive

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-16563

Ferreras, I; Saha, P; Williams, L; Burles, S (2008). Mapping the distribution of luminous and dark matter in strong lensing galaxies. Proceedings of the International Astronomical Union, 244:206-215.

[img]
Preview
Accepted Version
PDF
381kB

View at publisher
[img]
Preview
PDF (Verlags-PDF)
344kB

Abstract

We present the distribution of luminous and dark matter in a set of strong lensing (early-type) galaxies. By combining two independent techniques – stellar population synthesis and gravitational lensing – we can compare the baryonic and dark matter content in these galaxies within the regions that can be probed using the images of the lensed background source. Two samples were studied, extracted from the CASTLES and SLACS surveys. The former probes a wider range of redshifts and allows us to explore the mass distribution out to ~ 5Re. The high resolution optical images of the latter (using HST/ACS) are used to show a pixellated map of the ratio between total and baryonic matter. We find dark matter to be absent in the cores of these galaxies, with an increasing contribution at projected radii R xs2273 Re. The slopes are roughly compatible with an isothermal slope (better interpreted as an adiabatically contracted NFW profile), but a large scatter in the slope exists among galaxies. There is a trend suggesting most massive galaxies have a higher content of dark matter in the regions probed by this analysis.

Citations

Altmetrics

Downloads

18 downloads since deposited on 11 Mar 2009
11 downloads since 12 months

Detailed statistics

Additional indexing

Item Type:Journal Article, not refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
DDC:530 Physics
Language:English
Date:May 2008
Deposited On:11 Mar 2009 13:06
Last Modified:22 Jun 2014 18:43
Publisher:Cambridge University Press
ISSN:1743-9213
Additional Information:Copyright: Cambridge University Press
Publisher DOI:10.1017/S1743921307014007
Related URLs:http://arxiv.org/abs/0708.2151

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page