Photometric behavior of evolved supernovae

Details Photometric behavior of evolved supernovae Photometric behavior of evolved supernovae

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100..771t&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, Sept. 1990, p. 771-781.

Astronomy and Astrophysics

Astronomy

45

Stellar Evolution, Stellar Spectrophotometry, Supernovae, Radioactive Decay, Stellar Luminosity, Stellar Magnitude

Scientific paper

The late-time photometric behavior of supervovae 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, it is found that: (1) SN Ia maintain common characteristics even at late stages, declining with a similar rate both in B and in V bands, gamma of about 1.5 mag/100 days; (2) the decline rate of SN Ib in the B band is similar to that of SN Ia; (3) the average decline of SN II in V is close to that expected from the radioactive decay of Co-56, gamma (v) = 0.89 mag/100 days, while gamma (B) is significantly lower; and (4) 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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