NOAO > Observing Info > Approved Programs > 2010B-0318
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NOAO > Observing Info > Approved Programs > 2010B-0318 |
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PI: Douglas Clowe, Ohio University, clowe@ohio.edu
Address: Physics Department, 251B Clippinger Labs, Athens, Ohio 45701, USA
CoI: David Johnston, Fermilab
CoI: Melville Ulmer, Northwestern University
CoI: James Annis, Fermilab
CoI: Jeffery Kubo, Fermilab
CoI: Kellen Murphy, Ohio University
CoI: Christophe Adami, Laboratoire d'Astrophysique de Marseille
CoI: Sahar Allam, Fermilab
CoI: Richard Kron, Univ. of Chicago
CoI: Douglas Tucker, Fermilab
CoI: Vicent Le Brun, Laboratoire d'Astrophysique de Marseille
CoI: Olivier Ilbert, Laboratoire d'Astrophysique de Marseille
CoI: Huan Lin, Fermilab
CoI: Carlo Schimd, Laboratoire d'Astrophysique de Marseille
CoI: Christophe Benoist, Observatoire de la Cote d'Azur
CoI: Raphael Gavazzi, Institut d'Astrophysique de Paris
CoI: Tim Schrabback, Universiteit Leiden
CoI: Loic Guennou, Laboratoire d'Astrophysique de Marseille
Title: Photometric Redshifts of 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 > 2010B-0318 |
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