Theoretical Models of Type II Supernova SN1993J

Details Theoretical Models of Type II Supernova SN1993J Theoretical Models of Type II Supernova SN1993J

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aas...183.3102h&link_type=abstract

American Astronomical Society, 183rd AAS Meeting, #31.02; Bulletin of the American Astronomical Society, Vol. 25, p.1339

Astronomy and Astrophysics

Astronomy

Scientific paper

We present theoretical models of type II supernova SN1993J. We show that a late-type progenitor can explain the initial sharp peak in the supernova light curve, provided that the progenitor had lost almost all of its hydrogen-rich envelope prior to the supernova event. Our hydrodynamical calculations suggest that the progenitor had an initial main-sequence mass of ~ 15 Msun, a residual hydrogen-rich envelope mass of ~ 0.2 Msun, and an explosion energy of ~ 10(51) ergs. In our model, the secondary brightening of the light curve is caused by the radioactive energy input from the decay of ~ 0.1 Msun of {null }(56) Ni, and subsequently {null }(56) Co, produced in the explosion. The progenitor had most likely lost most of its hydrogen-rich envelope through mass transfer to a companion star, and we discuss the binary parameters which may lead to such a supernova event. From the binary parameters, we estimate the frequency of such events to be approximately 1 in 20-30 type II supernovae.

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