Publication Details

AFRICAN RESEARCH NEXUS

SHINING A SPOTLIGHT ON AFRICAN RESEARCH

earth and planetary sciences

An intensive hubble space telescope survey for z>1 type Ia supernovae by targeting galaxy clusters

Astronomical Journal, Volume 138, No. 5, Year 2009

We present a new survey strategy to discover and study high-redshift Type Ia supernovae (SNe Ia) using the Hubble Space Telescope (HST). By targeting massive galaxy clusters at 0.9 < z < 1.5, we obtain a twofold improvement in the efficiency of finding SNe compared to an HST field survey and a factor of 3 improvement in the total yield of SN detections in relatively dust-free red-sequence galaxies. In total, sixteen SNe were discovered at z>0.95, nine of which were in galaxy clusters. This strategy provides an SN sample that can be used to decouple the effects of host-galaxy extinction and intrinsic color in high-redshift SNe, thereby reducing one of the largest systematic uncertainties in SN cosmology. © 2009 The American Astronomical Society. All rights reserved.

Statistics
Citations: 58
Authors: 46
Affiliations: 31
Study Design
Cross Sectional Study
Study Approach
Quantitative