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.
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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.
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|Item Type:||Journal Article, not refereed, original work|
|Communities & Collections:||07 Faculty of Science > Institute for Computational Science|
|Dewey Decimal Classification:||530 Physics|
|Deposited On:||11 Mar 2009 13:06|
|Last Modified:||22 Jun 2014 18:43|
|Publisher:||Cambridge University Press|
|Additional Information:||Copyright: Cambridge University Press|
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