The bolometric light curve of SN 1993J and the nature of its progenitor |
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| Authors: | A Ray K P Singh F K Sutaria |
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| Institution: | (1) Tata Institute of Fundamental Research, 400 005 Bombay |
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| Abstract: | We have constructed the bolometric light curve of SN 1993J based on UBVRI(JHK) photometric data obtained from various sources
and assumingA
V = 0 and a distance modulus of 27.6. Effective temperatures and photosphere radius at various times have been obtained from
detailed blackbody fits. The bolometric light curve shows two maxima. The short rise time to the second maximum, and the luminosities
at the minimum and the second maximum are used to constrain the properties of the progenitor star. The total mass of the hydrogen
envelope MH, in the star is found to be ≲ 0.2 M⊙ at the time of explosion, and the explosion ejected about 0.05 M⊙ of Ni56. Thin hydrogen envelope combined with a sufficient presupernova luminosity suggest that the exploding star was in a binary
with a probable period range of 5yr ≤P
orb
≤ 11yr. |
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| Keywords: | Stars: Supernovae: SN1993J techniques: photometry stars: evolution |
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