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Date and Time of the Query: 2019-08-20 T22:42:37 PDT
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For refcode 1990AJ....100..771T:
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Copyright by American Astronomical Society. Reproduced by permission
1990AJ....100..771T PHOTOMETRIC BEHAVIOR OF EVOLVED SUPERNOVAE MASSIMO TURATTO AND ENRICO CAPPELLARO Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy ROBERTO BARBON Osservatorio Astrofisico di Asiago, Universita di Padova, via dell'Osservatorio, I-36012 Asiago, Italy MASSIMO DELLA VALLE ISAS, Strada Costiero 1 1, I-34014 Triesite, Italy SERGIO ORTOLANI Osservatorio Astronomica di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova, Italy LEONIDA ROSINO Osservatorio Astrofisico di Asiago, Universita di Padova, via dell'Osservatorio I-36012 Asiago, Italy Received 25 October 1989; revised 30 April 1990 ABSTRACT The late-time photometric behavior of supernovae has been analyzed combining observations obtained during a dedicated program with photometric data available in the literature at phase later than 100 days after maximum. Comparing the late light curves of different types of supernovae we find that: (a) SN Ia maintain common characteristics even at late stages, declining with a similar rate both in B and in V bands, V~/- = 1.5 mag/100 days; (b) the decline rate of SN Ib in the B band is similar to that of SN Ia; (c) the average decline rate of SN II in V is close to that expected from the radioactive decay of ^56^Co,V_v_ = 0.89 mag/100 days, while V_B_ is significantly lower; and (d) a comparable mass of Ni appears to be synthesized by all SN II, whereas SN Ia produce a larger amount of radioactive material.
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