Bolometric light curve of SN 1987A - Results from day 616 to 1316 after outburst

Details Bolometric light curve of SN 1987A - Results from day 616 to 1316 after outburst Bolometric light curve of SN 1987A - Results from day 616 to 1316 after outburst

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.1135b&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 102, Sept. 1991, p. 1135-1146.

Astronomy and Astrophysics

Astronomy

43

Infrared Astronomy, Light Curve, Stellar Luminosity, Supernova 1987A, Emission Spectra, Energy Spectra, Infrared Photometry, Neutron Stars, Radioactive Decay, Spectral Energy Distribution

Scientific paper

The bolometric light curve of Sn 1987A from day 616 to day 1316 after an outburst is presented. This curve is based on infrared J to Q0 broadband photometry and a blackbody extrapolation for the far infrared flux beyond 20 microns, where no observations are available. From a positive detection achieved at 1.3 mm, it is inferred that free-free emission contributes to the energy spectrum. These data with the assumption made for the FIR extrapolation show that at least until day 791, the bolometric light curve decreases at the exponential rate reported for earlier epochs, levels off from about day 900 to 1050 above the linear extrapolation of this exponential decrease, and then resumes a slow decrease still above the luminosity predicted by models based on radioactive decays. The implications of such behavior are discussed, and the results are shown to be consistent with an energy input absorbed and reradiated by dust in the ejecta.

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