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Accurate cosmology from gravitational-lens time delays

Published online by Cambridge University Press:  26 February 2013

S. H. Suyu
S. H. Suyu*
Affiliation:
Department of Physics, University of California, Santa Barbara, CA 93106, USA email: suyu@physics.ucsb.edu Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, CA 94035, USA
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Abstract

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The time delays between the multiple images of a strong gravitational-lens system, together with a model of the lens-mass distribution, provide a one-step determination of the time-delay distance, and thus a measure of cosmological parameters, particularly the Hubble constant, H0. I review the recent advances in measuring time-delay distances, and present the current status of cosmological constraints based on gravitational-lens time delays. In particular, I report the time-delay distance measurements of two gravitational lenses and their implication for cosmology from a recent study by Suyu et al.

Keywords

distance scalegravitational lensing
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S289: Advancing the Physics of Cosmic Distances , August 2012 , pp. 331 - 338
Copyright
Copyright © International Astronomical Union 2013

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