Theoretical light curve of SN 1987A and mixing of hydrogen and nickel in the ejecta

Journal Article · Sat Sep 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169114· OSTI ID:6150778

Shigeyama, Toshikazu; Nomoto, Kenichi ^[1]

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1. Tokyo Univ. (Japan)

Earlier light curve models for SN 1987A have been improved by adopting more realistic presupernova models and adopting a postexplosion elemental distribution consistent with X-ray and gamma-ray observations. The light curve shape is sensitive to the distributions of abundance and expansion velocity in the ejecta. It is found that the prepeak smooth rise and the broad peak of the light curve, respectively, are well modeled by assuming some mixing of Ni-56 into the hydrogen-rich envelope and of hydrogen into the core. The existence of the hydrogen recombination front is responsible for the formation of the plateaulike peak. For explosion energy, good agreement with the observed light curve is obtained for E/M(env) = (1.1 + or - 0./3) x 10 to the 50th ergs/solar mass. Further improvements on the early light curve, the dependence of the light curve on the distribution of Ni-56 and hydrogen, and the relation with other type II supernovae are discussed. 72 refs.

• OSTI ID: 6150778
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 360; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BRIGHTNESS
CHEMICAL COMPOSITION
CHEMISTRY
COSMOCHEMISTRY
ELECTROMAGNETIC RADIATION
ELEMENTS
EQUILIBRIUM
ERUPTIVE VARIABLE STARS
EXPLOSIONS
FINITE DIFFERENCE METHOD
GAMMA RADIATION
HYDROGEN
IONIZING RADIATIONS
ITERATIVE METHODS
LTE
LUMINOSITY
MASS TRANSFER
MATHEMATICAL MODELS
METALS
MIXING
NICKEL
NONMETALS
NUMERICAL SOLUTION
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
STAR MODELS
STARS
SUPERNOVAE
TRANSITION ELEMENTS
VARIABLE STARS
X RADIATION