The effects of mixing of the ejecta on the gamma-ray lines from SN 1987A

Details The effects of mixing of the ejecta on the gamma-ray lines from SN 1987A The effects of mixing of the ejecta on the gamma-ray lines from SN 1987A

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...327l...9s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 327, April 1, 1988, p. L9-L12.

Astronomy and Astrophysics

Astrophysics

35

Gamma Ray Spectra, Light Curve, Line Spectra, Stellar Mass Ejection, Supernova 1987A, Cobalt Isotopes, Compton Effect, Stellar Envelopes, Stellar Models, X Rays

Scientific paper

Mixing of matter in the ejecta is suggested by hydrodynamical calculations for SN 1987A. The X-ray flux calculated including mixing reproduces well the observed X-ray light curve and spectra. The effects of mixing on the gamma-ray lines have been estimated. The line fluxes at times less than 1.5 yr after the explosion strongly depend on mixing, and are greatly increased for values of the mixed mass larger than 4 solar masses. The peak advances to an earlier time and its flux is also greatly enhanced. If 5 solar masses are adopted for the mixed mass, as suggested from the X-ray calculations, the 847 keV line will reach its peak around 1.1 yr after the explosion with flux of 0.00086 photons/sq cm per s. If the mixed mass is less than 4 solar masses, the mixing effect becomes less prominent. The gamma-ray lines expected from SN 1987A should be observable. The way in which gamma-ray line observations can be used to diagnose properties of the ejecta is discussed.

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