The Distant Type Ia Supernovae Rate

Details The Distant Type Ia Supernovae Rate The Distant Type Ia Supernovae Rate

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.2401p&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #24.01; Bulletin of the American Astronomical Society, Vol. 33, p.1346

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We present a measurement of the rate of distant Type Ia supernovae derived using 4 large subsets of data from the Supernova Cosmology Project. Within this fiducial sample, which surveyed about 12 square degrees, thirty-eight supernovae were detected at redshifts 0.25--0.85. In a spatially-flat cosmological model consistent with the results obtained by the Supernova Cosmology Project, we derive a rest-frame Type Ia supernova rate at a mean redshift z~=0.55 of 1.53 +0.28-0.25 +0.32-0.31 10-4 h3 Mpc-3 yr-1 or 0.58 +0.10-0.09 +0.10-0.09 h2 SNu (1 SNu = 1 supernova per century per 1010LB&sun; ), where the first uncertainty is statistical and the second includes systematic effects. The dependence of the rate on the assumed cosmological parameters is studied and the redshift dependence of the rate per unit comoving volume is contrasted with local estimates in the context of possible cosmic star formation histories and progenitor models.

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