Abstract
Presupernova evolution of the progenitor of SN 1987A, hydrodynamics of explosion (shock propagation, explosive nucleosynthesis), optical light curve due to shock heating and 56Co decay, and X-ray and γ-ray light curves are calculated and compared with the observations of SN 1987A. Constraints on the mass of the hydrogen-rich envelope M env (i.e., mass loss history) and the helium abundance in the envelope are obtained from the progenitor's blue-red-blue evolution as well as from the light curve. The explosion energy E and the mass and distribution of 56Ni are inferred from the light curves. Models and observations are in reasonable agreement for E/M env = 1.5 ± 0.5 ×1050 erg/M ⊙, M env = 5 − 10 M ⊙, and M Ni ≈ 0.07 M⊙. Mixing of 56Ni into the envelope is indicated.
Light curves of exploding bare helium stars are also calculated to see whether the observed Type Ib supernova light curves can be accounted for.
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Nomoto, K., Shigeyama, T., Hashimoto, Ma. (1988). Light curve models for SN 1987A and diagnosis of supernova interior. In: Nomoto, K. (eds) Atmospheric Diagnostics of Stellar Evolution: Chemical Peculiarity, Mass Loss, and Explosion. Lecture Notes in Physics, vol 305. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0034618
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DOI: https://doi.org/10.1007/BFb0034618
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