Probing Galaxy Mass Evolution with Gravitational Lensing

Details Probing Galaxy Mass Evolution with Gravitational Lensing Probing Galaxy Mass Evolution with Gravitational Lensing

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21530002l&link_type=abstract

American Astronomical Society, AAS Meeting #215, #300.02; Bulletin of the American Astronomical Society, Vol. 42, p.295

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Scientific paper

I have measured the average mass properties of a sample of 41 strong gravitational lenses at moderate redshift (z 0.4 - 0.9), using the techniques of strong and weak gravitational lensing. I have determined that the average mass overdensity profile of the lenses can be fit with a power-law profile that is consistent with an isothermal profile. Additionally, I use a two-component de Vaucouleurs+NFW model to decompose the total mass profile into separate luminous and dark matter components, and determine the relative fraction of each component. I measure the average rest frame V-band stellar mass-to-light ratio and virial mass-to-light ratio for the sample, finding a virial-to-stellar mass ratio for the sample of Mvir/M* = 75 +/- 25. Finally, I compare my results to a previous study using low redshift lenses, to understand how galaxy mass profiles evolve over time, in particular investigating the evolution of Mvir/M*(z).

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