Galaxy bias measurement with weak-lensing in COSMOS

Details Galaxy bias measurement with weak-lensing in COSMOS Galaxy bias measurement with weak-lensing in COSMOS

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hst..prop12136j&link_type=abstract

HST Proposal ID #12136. Cycle 18

Astronomy and Astrophysics

Astrophysics

Scientific paper

We propose to use weak gravitational lensing to measure the astrophysical bias between the density of galaxies and that of the surrounding dark matter structure. The COSMOS/ACS observations provide a unique dataset for this analysis, and we will leverage recent extensions to achieve measurements an order of magnitude more precise than previously possible - spanning both larger and smaller scales, and higher redshifts. In particular, our new 3D weak lensing catalog benefits from {i} improved photometric redshifts, especially out to z>1, and {ii} correction of the raw ACS images for charge transfer inefficiency trailing, and {iii} an improved calibration of shear measurements as a function of redshift.;

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