Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.9007w&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #90.07; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
In a 219 orbit Hubble Space Telescope program (Perlmutter, PI), we have used the Advanced Camera for Surveys (ACS) to search for SNe in high redshift galaxy clusters (See poster by Barbary et al). We present a preliminary analysis of the effects of gravitational lensing on three supernovae (SNe) discovered in the background of these clusters. Assuming hydrostatic equilibrium, we calculate the line of sight velocity dispersion of the lensing cluster in order to determine a virialized mass and radius. Using this data, we construct a dark matter halo model using the Navaro, Frenk, & White (NFW) profile. We then compute the magnification factor of the supernovae due to gravitational lensing by the cluster halo, with an emphasis on reducing systematic errors attributed to these SNe in a future cosmology analysis.
This work has been supported by the Office of Science, U.S. Department of Energy, through contract DE-AC02-05CH11231 and in part by NASA through grants associated with HST-GO-10496.
Cosmology Project Supernova
Dawson Kyle
Huang Xing
Perlmutter Saul
Pritchard Tyler
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