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Theory Seminar (High Energy/Cosmology)
Galaxy-galaxy lensing for cosmology in the Dark Energy Survey
Date: Tuesday, March 15th
Time: 3:30 pm
Place: 5280 Chamberlin Hall
Speaker: Juliana Kwan, University of Pennsylvania
Abstract: The Dark Energy Survey (DES) is an ongoing photometric survey that
will cover 5000 sq deg of the Southern sky over five years with the
aim of determining the origin of cosmic acceleration. Two of the key
probes involved in achieving this goal are the large scale clustering
of galaxies and weak gravitational lensing, which are more powerful
when taken in combination, since the dependence on galaxy bias can be
broken in both probes. Using the red galaxies identified in the Science
Verification area in DES, we have measured the angular clustering and
tangential shear from galaxy-galaxy lensing using red sequence
selected galaxies. In this talk, I will present constraints on the
dark energy equation of state and the amplitude of clustering from a
joint analysis of these probes.
Host: Amol Upadhye
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