Astrophys. J., 741, 97 (2011/November-2)
The first systematic study of type Ibc supernova multi-band light curves.
DROUT M.R., SODERBERG A.M., GAL-YAM A., CENKO S.B., FOX D.B., LEONARD D.C., SAND D.J., MOON D.-S., ARCAVI I. and GREEN Y.
Abstract (from CDS):
We present detailed optical photometry for 25 Type Ibc supernovae (SNe Ibc) within d ~ 150 Mpc obtained with the robotic Palomar 60 inch telescope in 2004-2007. This study represents the first uniform, systematic, and statistical sample of multi-band SNe Ibc light curves available to date. We correct the light curves for host galaxy extinction using a new technique based on the photometric color evolution, namely, we show that the (V - R) color of extinction-corrected SNe Ibc at Δt ~ 10 days after V-band maximum is tightly distributed, ≲ (V - R)V10> = 0.26±0.06 mag. Using this technique, we find that SNe Ibc typically suffer from significant host galaxy extinction, ≲ E(B - V)> ~ 0.4 mag. A comparison of the extinction-corrected light curves for helium-rich (Type Ib) and helium-poor (Type Ic) SNe reveals that they are statistically indistinguishable, both in luminosity and decline rate. We report peak absolute magnitudes of ≲ MR > = -17.9±0.9 mag and ≲ MR> = -18.3±0.6 mag for SNe Ib and Ic, respectively. Focusing on the broad-lined (BL) SNe Ic, we find that they are more luminous than the normal SNe Ibc sample, ≲ MR> = -19.0 ± 1.1 mag, with a probability of only 1.6% that they are drawn from the same population of explosions. By comparing the peak absolute magnitudes of SNe Ic-BL with those inferred for local engine-driven explosions (GRB-SN 1998bw, XRF-SN 2006aj, and SN 2009bb) we find a 25% probability that relativistic SNe are drawn from the overall SNe Ic-BL population. Finally, we fit analytic models to the light curves to derive typical 56Ni masses of MNi~ 0.2 and 0.5 M☉ for SNe Ibc and SNe Ic-BL, respectively. With reasonable assumptions for the photospheric velocities, we further extract kinetic energy and ejecta mass values of Mej~ 2 M☉ and EK~ 1051 erg for SNe Ibc, while for SNe Ic-BL we find higher values, Mej ~ 5 M☉ and EK~ 1052 erg. We discuss the implications for the progenitors of SNe Ibc and their relation to those of engine-driven explosions.
supernovae: general - gamma-ray burst: general
VizieR on-line data:
<Available at CDS (J/ApJ/741/97): table1.dat table2.dat refs.dat>
erratum vol. 753, art. 180 (2012)
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