X-rays expected from supernova 1987A compared with the source discovered by the GINGA satellite

Details X-rays expected from supernova 1987A compared with the source discovered by the GINGA satellite X-rays expected from supernova 1987A compared with the source discovered by the GINGA satellite

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987natur.330..233i&link_type=abstract

Nature (ISSN 0028-0836), vol. 330, Nov. 19, 1987, p. 233-235. Research supported by the University of Tokyo.

Other

83

Ginga Satellite, Japanese Spacecraft, Spaceborne Telescopes, Stellar Models, Supernova 1987A, X Ray Sources, Compton Effect, Magnetohydrodynamic Stability, Radioactive Decay, Spectral Energy Distribution, Stellar Envelopes, Supernova Remnants

Scientific paper

A hydrodynamic model of SN1987A has been constructed, and the optical light curve and the X-ray light curve and spectrum have been calculated from Co-56 decay. For the optical light curve, the model agrees better with observations if some Co-56 is mixed into outer layers rather than being confined to the deepest layer of the ejecta. Such mixing has much larger effects on the X-ray light curve. Without the mixing of Co-56, X-rays would not be observable by Ginga until about 250 d after the explosion. With mixing, the X-rays emerge much earlier. X-ray emission from radioactive decay may therefore qualitatively account for the hard component of X-rays from SN1987A observed by Ginga, if Co-56 has been mixed into the outer layers. The soft component of the spectrum cannot be explained by the radioactive model and must be due to another mechanism.

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