NOAO > Observing Info > Approved Programs > 2009B-0340
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NOAO > Observing Info > Approved Programs > 2009B-0340 |
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PI: Doug Clowe, Ohio University, clowe@ohio.edu
Address: Physics Department, Clippinger Lab 251B, Athens, OH 45701, US
CoI: David Johnston, Northwestern University
CoI: Melville P. Ulmer, Northwestern University
CoI: Christophe Adami, OAMP, Marseille
CoI: Tim Schrabback, Leiden Observatory, Universiteit Leiden
CoI: James Annis, Fermi National Accelerator Lab
Title: Photometric Redshifts for Weak Lensing Tomography of Galaxy Clusters
Abstract:
Weak lensing tomography is a powerful new tool for constraining
cosmology in a way that is independent of both the physics and
systematics of other methods. By measuring the variation in the weak
lensing shear as a function of background galaxy redshift, we make a
purely geometric measurement of the expansion rate history. This has
the ability to measure dark energy and even constrain deviations from
general relativity. We apply this technique to 91 clusters for which we
have Hubble Space Telescope data. This proposal, a continuation of a
previous NOAO project, seeks to follow up these clusters and obtain
ground-based photometry which will provide photometric redshifts, fully
enabling the technique. In addition, we will provide a legacy data set
of galaxy clusters with Hubble images and accurate photometric redshifts
which will be of great value to the astronomical community.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2009B-0340 |
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