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On the relative frequencies of spectroscopically normal and peculiar type IA supernovae
Abstract
After defining what we mean by spectroscopically "normal" and "peculiar" Type Ia supernovae, we report the results of an attempt to subclassify 84 SNe Ia either as normal or as like one of the recent, peculiar SNe Ia: 1991T, 1991bg, or 1986G. Only SNe 1957A and 1960H are found to have been certifiably abnormal, with SN 1957A appearing to have been like SN 1991bg, and SN 1960H having been like SN 1991bg or SN 1986G; SNe 1971I and 1980I are under suspicion of having been like SN 1986G, and SN 1988G of having been like SN 1991T. Of the SNe Ia we have been able to classify either as normal or as peculiar, 89% (or 83%, counting those under suspicion as peculiar) are normal. Our main conclusion is that the observational sample of SNe Ia is strongly peaked at "spectroscopically normal." We further conclude that when arranged in the photometric sequence of Phillips [ApJ, 413, L105 (1993)] SNe Ia also form a spectroscopic sequence, and that peculiar SNe Ia are over-represented in the Phillips sample.
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Citations
Cited by
Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
Riess, A. G., Filippenko, A. V., Challis, P., Clocchiatti, A., Diercks, A., Garnavich, P. M., Gilliland, R. L., Hogan, C. J., Jha, S., Kirshner, R. P., et al. (1998) · The Astronomical Journal · doi:10.1086/300499 · Cited by 19,704
TYPE Iax SUPERNOVAE: A NEW CLASS OF STELLAR EXPLOSION
Foley, R. J., Challis, P. J., Chornock, R., Ganeshalingam, M., Li, W., Marion, G. H., Morrell, N. I., Pignata, G., Stritzinger, M. D., Silverman, J. M., et al. (2013) · The Astrophysical Journal · doi:10.1088/0004-637x/767/1/57 · Cited by 391
Progenitors of type Ia supernovae
Wang, B., & Han, Z. (2012) · New Astronomy Reviews · doi:10.1016/j.newar.2012.04.001 · Cited by 377
SN 2002cx: The Most Peculiar Known Type Ia Supernova
Li, W., Filippenko, A. V., Chornock, R., Berger, E., Berlind, P., Calkins, M. L., Challis, P., Fassnacht, C., Jha, S., Kirshner, R. P., et al. (2003) · Publications of the Astronomical Society of the Pacific · doi:10.1086/374200 · Cited by 361
Strolger, L., Riess, A. G., Dahlen, T., Livio, M., Panagia, N., Challis, P., Tonry, J. L., Filippenko, A. V., Chornock, R., Ferguson, H., et al. (2004) · The Astrophysical Journal · doi:10.1086/422901 · Cited by 309
Metadata
- Authors
- Branch, D., Fisher, A., & Nugent, P.
- Venue
- The Astronomical Journal
- Publisher
- American Astronomical Society
- Published
- 1993-12
- Volume
- 106
- Pages
- 2383
- ISSN
- 0004-6256 (ISSN-L)
- OpenAlex
- W1990650561
- Cited by
- 239
- References
- 0
- FWCI
- 7.79
- Type
- journal article
- Language
- en
- Open access
- closed
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- Branch, D., Fisher, A., & Nugent, P. (1993). On the relative frequencies of spectroscopically normal and peculiar type IA supernovae. The Astronomical Journal. https://doi.org/10.1086/116810
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