Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21733716h&link_type=abstract
American Astronomical Society, AAS Meeting #217, #337.16; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
This work explored the relationship of SNe Ibc to their host galaxies. Using a set of well-characterized SNe Ibc lightcurves, the properties of these SNe lightcurves (peak magnitude and decay time) were retrieved and catalogued. The properties of the supernova host galaxies (star formation rate, physical size, and metallicity) were then derived by obtaining SED data on each galaxy from the NASA NED database and using well-established empirical relations that correlate the flux from the galaxies in certain bands to the galaxy's s star formation rates and metallicities. SNe Ibc have not been well characterized in a systematic way; this study is the first to make use of a large sample of calibrated lightcurves for these supernovae. In addition, several well-studied supernovae from the literature were included in the study. Each supernova property was compared to the derived galaxy properties by plotting each pair (e.g., peak SN magnitude vs. host galaxy star formation rate) and then conducting a correlation test to determine the existence and strength of the correlation between the supernovae and galaxy properties in each case. This test was conducted for each supernova type. The goal of the research is to determine what systematic differences may exist between the environments of SNe Ib and Ic, in order to shed light on possible differences in the explosion mechanisms of these SN types. The supernova lightcurve contains data on the explosion itself while the host galaxy properties yield information on the progenitor star; the hope is that these two datasets can be linked. Ultimately the goal is to better understand the relationship between SNe and GRBs. The property sets did not yield obvious correlations, with the exception of a correlation between host galaxy star formation rate and lightcurve width for SNe Ib.
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