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Late-Time Spectroscopy of SN 2002cx: The Prototype of a New Subclass of Type Ia Supernovae
Open accessAbstract
We present Keck optical spectra of SN 2002cx, the most peculiar known Type Ia supernova (SN Ia), taken 227 and 277 days past maximum light. Astonishingly, the spectra are not dominated by the forbidden emission lines of iron that are a hallmark of thermonuclear SNe in the nebular phase. Instead, we identify numerous P Cygni profiles of Fe II at very low expansion velocities of ∼700 km s -1 , which are without precedent in SNe Ia. We also report the tentative identification of low-velocity O I in these spectra, suggesting the presence of unburned material near the center of the exploding white dwarf. SN 2002cx is the prototype of a new subclass of SNe Ia, with spectral characteristics that may be consistent with recent pure deflagration models of Chandrasekhar-mass thermonuclear SNe. These are distinct from the majority of SNe Ia, for which an alternative explosion mechanism, such as a delayed detonation, may be required.
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Cited by
Wood‐Vasey, W. M., Miknaitis, G., Stubbs, C. W., Jha, S., Riess, A. G., Garnavich, P. M., Kirshner, R. P., Aguilera, C., Becker, A. C., Blackman, J. W., et al. (2007) · The Astrophysical Journal · doi:10.1086/518642 · Cited by 928
Self-citationDetermining the Type, Redshift, and Age of a Supernova Spectrum
Blondin, S., & Tonry, J. L. (2007) · The Astrophysical Journal · doi:10.1086/520494 · Cited by 507
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
Self-citationSilverman, J. M., Foley, R. J., Filippenko, A. V., Ganeshalingam, M., Barth, A. J., Chornock, R., Griffith, C. V., Kong, J. J., Lee, N., Leonard, D. C., et al. (2012) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2012.21270.x · Cited by 347
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Metadata
- Authors
- Jha, S., Branch, D., Chornock, R., Foley, R. J., Li, W., Swift, B. J., Casebeer, D., & Filippenko, A. V.
- Venue
- The Astronomical Journal
- Publisher
- American Astronomical Society
- Published
- 2006-06-02
- Volume
- 132
- Issue
- 1
- Pages
- 189-196
- ISSN
- 0004-6256 (ISSN-L)
- 1538-3881
- OpenAlex
- W2094018535
- Cited by
- 167
- References
- 0
- FWCI
- 5.79
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Jha, S., Branch, D., Chornock, R., Foley, R. J., Li, W., Swift, B. J., Casebeer, D., & Filippenko, A. V. (2006). Late-Time Spectroscopy of SN 2002cx: The Prototype of a New Subclass of Type Ia Supernovae. The Astronomical Journal. https://doi.org/10.1086/504599
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