Type I supernovae in the infrared and their use as distance indicators

Creators: Elias, J. H.; Matthews, K.; Neugebauer, G.; Persson, S. E.

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Abstract

New infrared data for 11 Type I supernovae are presented. These results, when combined with other published data for Type I supernovae, show that the light curves fall into two well-defined groups. The first more common type - Type Ia - shows strong, variable, unexplained absorption at 1.2 μm and probably at 3.5 μm, while the second type - Type Ib - shows no such absorption and a slower decline after maximum. The light curves of the Type Ia supernovae appear to have a dispersion in color and absolute magnitude of ±0.2 mag or less, making them potentially valuable for distance determination within the Local Supercluster.

Additional Information

© 1985 American Astronomical Society. Received 1985 January 28; accepted 1985 March 22. We would like to thank R. P. Kirshner and S. P. Willner for helpful conversations and aid in recovering the SN 1972e data. We would also like to thank B. Madore, C. McAlary, M. Aaronson, and J. Mould for obtaining two of the observations in Table 1. We would also like to thank O. J. Eggen and A. U. Landolt for providing their unpublished visual photometry on SN 1972e and SN 1980n. This work has been supported by the NSF under grant AST 83-12699.

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Published - 1985ApJ___296__379E.pdf

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