Swartz 1991 Ic SN 1984L late light curve

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Title:		The late-time light curve of SN 1984L
Authors:		Swartz, Douglas A.; Wheeler, J. C.
Affiliation:		AA(Texas, University, Austin), AB(Texas, University, Austin)
Publication:		Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 379, Sept. 20, 1991, p. L13-L16. Research supported by NSF and Robert A. Welch Foundation. (ApJ Homepage)
Publication Date:		09/1991
Category:		Astrophysics
Origin:		STI
NASA/STI Keywords:		LIGHT CURVE, STELLAR EVOLUTION, SUPERNOVAE, COBALT ISOTOPES, RADIOACTIVE DECAY, STELLAR MASS EJECTION, STELLAR MODELS, STELLAR SPECTRA
DOI:		10.1086/186142
Bibliographic Code:		1991ApJ...379L..13S

Abstract

The V band light curve of the Type Ib supernova SN 1984L indicates that the radioactive cobalt decay products are significantly trapped for times in excess of 400 days. Assuming V is parallel to the bolometric light curve, the observations require on the order of 10 M solar masses of ejecta as shown by expressing the deviation of the bolometric light curve from the cobalt decay curve in terms of the mass, gamma-ray optical depth, and kinetic energy of the ejecta. This result is confirmed by numerical calculations. The large ejecta mass thus deduced is discussed in the context of observations of other Type Ib and Ic supernovae and recent low-mass models of their light curves.