Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.6801t&link_type=abstract
American Astronomical Society Meeting 203, #68.01; Bulletin of the American Astronomical Society, Vol. 35, p.1314
Astronomy and Astrophysics
Astronomy
1
Scientific paper
I will present the latest results from the Lenses Structure and Dynamics (LSD) Survey. Using ESI on the Keck Telescope, we have measured spatially resolved stellar kinematics for a sample of 11 early-type galaxies (E/S0s) in the range z=0.1-1, selected as gravitational lenses. By combining lensing and dynamical analysis, we break the degeneracies inherent to each method alone and obtain an accurate measurement of the amount and distribution of dark matter in high redshift E/S0s. I will discuss the implications of these measurements on the epoch and mechanism of formation of early-type galaxies. I will also show how this method can be used to measure the Hubble Constant from gravitational time delays with precision similar to the local distance ladder method.
Koopmans Leon
Treu Tommaso
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