The First Uniform and Statistical Sample of Type Ibc Supernovae Light-Curves

Details The First Uniform and Statistical Sample of Type Ibc Supernovae Light-Curves The First Uniform and Statistical Sample of Type Ibc Supernovae Light-Curves

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543018d&link_type=abstract

American Astronomical Society, AAS Meeting #215, #430.18; Bulletin of the American Astronomical Society, Vol. 42, p.359

Astronomy and Astrophysics

Astronomy

Scientific paper

Through our dedicated Palomar 60-inch monitoring campaign, we obtained detailed optical observations for 36 local (d ≤ 150 Mpc) SNe Ibc between 2004 and 2007. Here we present a preliminary analysis of the light-curves and peak absolute magnitudes, representing the first uniform and statistical data set. We find significant dispersion in both the width and decay rates of the light-curves, and, through a comparison with the small, well-studied, set of SNe Ibc in the literature, find that a significant fraction of SNe Ibc are heavily extincted (AV ≥ 0.5 mag). After correcting our light-curves for local extinction, we construct MV,peak histograms for our SNe Ib and Ic. The resulting distributions are found to be statistically indistinguishable, and, therefore, not inconsistent with a single progenitor model. A comparison of SNe Ibc peak magnitudes to the inferred values from nearby (z ≤ 0.7) GRB-SNe shows significant overlap between the two samples, although a K-S test reveals that SNe Ibc are, on average, less luminous than GRB-SNe. This result may suggest that the Nickel production mechanism of GRB-SNe is distinct from that of ordinary SNe Ibc. However, it is also likely that this result stems from the many biases plaguing existing GRB-SNe studies.
This work is supported in part by the NSF REU and DOD ASSURE programs under NSF grant no. 0754568 and by the Smithsonian Institution.

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