Theoretical light curve of a type IIp supernova

Ronald G. Eastman, S. E. Woosley, Thomas A. Weaver, Philip A. Pinto

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64 Scopus citations


The light curve and other observable diagnostics are presented for what should be a typical Type II "plateau" supernova, the explosion of a 15 M red supergiant. The calculations are carried out using a multifrequency radiation transport code that includes opacity from all important mechanisms - bound-bound, bound-free, free-free, and electron scattering. It is found that the inclusion of opacity sources besides electron scattering increases the computed length of the plateau in the 15 M model by ∼30 days. Especially important is the ultraviolet cutoff caused by a thick forest of lines. Deposition and escape of γ-rays from radioactive decay are also accurately simulated. We find that the presence of 0.06 M of ejected 56Ni extends the length of the plateau from ∼100 days to ∼140 days. Because of the large hydrogen envelope and radius in this model, mixing does not appreciably alter the bolometric light curve, although it does change the γ-ray light curve significantly. With 0.06 M of ejected 56Ni, the unmixed (mixed) model peaks in escaping γ-rays at 576 (466) days with a γ-ray luminosity of 3 × 1038 (7 × 1038) ergs s-1. Except for the local group, the γ-rays from an extragalactic 15 M SNe IIp will be too faint to detect with any existing detectors. However, a Galactic SNe IIp would be quite bright and easily detectable.

Original languageEnglish (US)
Pages (from-to)300-310
Number of pages11
JournalAstrophysical Journal
Issue number1
StatePublished - Jul 20 1994


  • Gamma rays: theory
  • Stars: interiors
  • Supernovae: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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