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28 March 2024
 
  » arxiv » 1602.1736

 Article overview


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 ; V. V. Filippenko ; S. B. Cenko ; Y. Cao ; P. Nugent ;
Date 4 Feb 2016
AbstractThe optical and optical/near-infrared pseudobolometric light curves of 84 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 $L_{mathrm{p}}$, enabling the construction of a luminosity function. Subsequently, the mass of $^{56}$Ni synthesised 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 $L_{mathrm{p}}$, in erg s$^{-1}$, of log($L_{mathrm{p}})=42.99$ 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 synthesise approximately twice the amount of $^{56}$Ni compared with SNe Ic, Ib, and IIb, with median $M_{mathrm{Ni}} = 0.34$, 0.16, 0.14, and 0.11 M$_{odot}$, respectively. SNe Ic-BL, and to a lesser extent SNe Ic, typically rise from $L_{mathrm{p}}/2$ to $L_{mathrm{p}}$ more quickly than SNe Ib/IIb; consequently, their light curves are not as broad.
Source arXiv, 1602.1736
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