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The bolometric light curves and physical parameters of stripped-envelope supernovae
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Number of Authors: 17
2016 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 458, no 3, 2973-3002 p.Article in journal (Refereed) Published
Abstract [en]

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 L-p, enabling the construction of a luminosity function. Subsequently, the mass of Ni-56 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 L-p, in erg s(-1), of log(L-p)= 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 M-Ni = 0.34, 0.16, 0.14, and 0.11 M-circle dot, respectively. SNe Ic-BL, and to a lesser extent SNe Ic, typically rise from L-p/2 to L-p more quickly than SNe Ib/IIb; consequently, their light curves are not as broad.

Place, publisher, year, edition, pages
2016. Vol. 458, no 3, 2973-3002 p.
Keyword [en]
supernovae: general
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:su:diva-131197DOI: 10.1093/mnras/stw299ISI: 000375799000052OAI: diva2:938879
Available from: 2016-06-17 Created: 2016-06-14 Last updated: 2016-06-17Bibliographically approved

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Fremling, ChristofferSollerman, Jesper
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Department of AstronomyThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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