A type Ia supernova has no hydrogen around it. But hydrogen gas has now been found in the vicinity of a supernova that otherwise fits the type Ia classification. Might this offer clues to the origin of these objects?
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Parodi, B. R., Saha, A., Sandage, A. & Tammann, G. A. Astrophys. J. 540, 634–651 (2000).
Freedman, W. L. et al. Astrophys. J. 553, 47–72 (2001).
Saha, A. et al. Astrophys. J. 562, 314–336 (2001).
Riess, A. et al. Astron. J. 116, 1009–1038 (1998).
Perlmutter, S. et al. Astrophys. J. 517, 565–586 (1999).
Hamuy, M. et al. Nature 424, 651–654 (2003).
Wood-Vasey, W. M. et al. IAU Circ. 8019 (2002).
Branch, D., Jeffery, D., Blaylock, M. & Hatano, K. Publ. Astron. Soc. Pacif. 112, 217–223 (2000).
Cumming, R., Lundqvist, P., Smith, L., Pettini, M. & King, D. Mon. Not. R. Astron. Soc. 283, 1355–1360 (1996).
Iben, I. & Renzini, A. Annu. Rev. Astron. Astrophys. 21, 271–342 (1983).
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Baron, E. An elementary puzzle. Nature 424, 628–629 (2003). https://doi.org/10.1038/424628a