Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aipc..232..264b&link_type=abstract
Gamma-ray line astrophysics. AIP Conference Proceedings, Volume 232, pp. 264-266 (1991).
Astronomy and Astrophysics
Astrophysics
Supernovae, Stellar Structure, Interiors, Evolution, Nucleosynthesis, Ages, Abundances, Chemical Composition, Hydrodynamics
Scientific paper
We present results from numerical simulations of the early stages of the explosion of SN1987A. Using a 2D cylindrical geometry version of a Smooth Particle Hydrodynamics code, we follow the explosion for 3 months to investigate both early hydrodynamical instabilities and the effect of the subsequent radioactive decay of 56Ni and 56Co.
We show that the structure resulting from hydrodynamical instabilities occurring during the first few hours is substantially modified at later time by the radioactive decay of 56Ni and 56Co. The inner cavity of the expanding supernova remnant fills up with nickel and its decay products thus forming a giant ``nickel bubble''. The peak velocity of the nickel increases by approximately 30% after the decays. While these results adequately model the core of the observed Fe line profiles, they fail to reproduce the high velocity wings of the spectra.
Benz Willy
Herant Marc
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