The energy sources powering the late-time bolometric evolution of SN 1987A

Details The energy sources powering the late-time bolometric evolution of SN 1987A The energy sources powering the late-time bolometric evolution of SN 1987A

Jan 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...384l..33s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 384, Jan. 10, 1992, p. L33-L36.

Astronomy and Astrophysics

Astrophysics

64

Bolometers, Energy Sources, Magellanic Clouds, Nuclear Fusion, Supernova 1987A, Cobalt Isotopes, Radioactive Isotopes, Stellar Coronas

Scientific paper

Observations performed in order to elucidate the late-time bolometric evolution of SN 1987A are reported. New optical and infrared data show that a third radioactive nuclide, Co-57, is now powering the SN nebula. The best fit to the late-time bolometric light curve is with 0.01-solar-mass Co-57 (about five times the amount expected based on the solar ratio of Fe-57/Fe-56). If recent theoretical upper limits on the expected production of Co-57 and Ti-44 are correct, then either an additional energy input is needed or one of the fundamental assumptions used in the modeling of the data is in error. If a pulsar is present in the center of SN 1987A, it can be providing no more than about 8 x 10 exp 36 ergs/s on day 1500.

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