The bolometric light curves and physical parameters of stripped-envelope supernovae

S. J. Prentice, P. A. Mazzali, E. Pian, A. Gal-Yam, S. R. Kulkarni, A. Rubin, A. Corsi, C. Fremling, J. Sollerman, O. Yaron, I. Arcavi, W. Zheng, M. M. Kasliwal, A. V. Filippenko, S. B. Cenko, Y. Cao, P. E. Nugent

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Abstract

The optical and optical/near-infrared pseudo-bolometric light curves of 85 stripped-envelope supernovae (SNe) are constructed using a consistent method and a standard cosmology. The light curves are analysed to derive temporal characteristics and peak luminosity Lp, enabling the construction of a luminosity function. Subsequently, the mass of 56Ni synthesized in the explosion, along with the ratio of ejecta mass to ejecta kinetic energy, are found. Analysis shows that host-galaxy extinction is an important factor in accurately determining luminosity values as it is significantly greater than Galactic extinction in most cases. It is found that broad-lined SNe Ic (SNe Ic-BL) and gamma-ray burst SNe are the most luminous subtypes with a combined median Lp, in erg s-1, of log(Lp) = 43.00 compared to 42.51 for SNe Ic, 42.50 for SNe Ib, and 42.36 for SNe IIb. It is also found that SNe Ic-BL synthesize approximately twice the amount of 56Ni compared with SNe Ic, Ib, and IIb, with median MNi = 0.34, 0.16, 0.14, and 0.11 M, respectively. SNe Ic-BL, and to a lesser extent SNe Ic, typically rise from Lp/2 to Lp more quickly than SNe Ib/IIb; consequently, their light curves are not as broad.

Original languageEnglish
Pages (from-to)2973-3002
Number of pages30
JournalMonthly Notices of the Royal Astronomical Society
Volume458
Issue number3
DOIs
StatePublished - Mar 8 2016

Keywords

  • Supernovae: General

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