Other
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21910808s&link_type=abstract
American Astronomical Society, AAS Meeting #219, #108.08
Other
Scientific paper
Here we describe the Multi-Epoch Nearby Cluster Survey measurement of the type Ia supernova (SN Ia) rate in a sample of 57 X-ray selected galaxy clusters at 0.05 < z < 0.15. Using the CFHT/Megacam imager for SN discovery, along with spectroscopy from the MMT and Gemini, we spectroscopically confirmed twenty-three cluster SN Ia, four of which were intracluster events. After detailed detection efficiency simulations and measurement of the stellar luminosities in our clusters, we calculate a SN Ia rate of 0.041+/-0.018 SNuM within R200, and 0.038+/-0.018 SNuM within our red sequence galaxy population. By combining this SN Ia rate with other cluster SN rates at a variety of redshifts, we constrain the late time delay time distribution of SN Ia to go like t-1.64+/-0.54. This power law form is most consistent with the double detonation explosion mechanism for SN Ia, but is also consistent with the double degenerate scenario. Future cluster SN rate measurements at moderate redshift will further constrain the SN Ia progenitor.
Graham Maggie
Sand David J.
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