Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...245..490b&link_type=abstract
Astronomy and Astrophysics, Vol. 245, NO. 2/MAY(II), P. 490, 1991
Astronomy and Astrophysics
Astrophysics
36
Scientific paper
We derive the ultraviolet-optical-infrared (uvoir) bolometric luminosity evolution of SN 1987A for days 14-432 since outburst from the direct integration of optical and infrared spectrophotometry. For a given assumed distance modulus and reddening to SN 1987A, this method is more accurate than estimates of the uvoir bolometric luminosity based on the integration of broad-band magnitudes. We show that between days 130-300, SN 1987A declined exponentially with an e-folding time of 109.6 +/- 0.3 days, consistent with the thermalized energy released by the radioactive decay of ^56^Co. By day 300. the decline rate of the uvoir luminosity had increased significantly, consistent with model predictions of the growing transparency of the hydrogen envelope of SN 1987A to the ^56^Co γ- rays.
Bouchet Patrice
Gouiffès Ch.
Hanuschik Reinhard W.
Phillips Marcia
Suntzeff Nicholas B.
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