An asymptotic-giant-branch star in the progenitor system of a type la supernova

Mario Hamuy, M. M. Phillips, Nicholas B. Suntzeff, José Maza, L. E. González, Miguel Roth, Kevin Krisclunas, Nidia Morrell, E. M. Green, S. E. Persson, P. J. McCarthy

Research output: Contribution to journalArticlepeer-review

323 Scopus citations


Stars that explode as supernovae come in two main classes. A type Ia supernova is recognized by the absence of hydrogen and the presence of elements such as silicon and sulphur in its spectrum; this class of supernova is thought to produce the majority of iron-peak elements in the Universe. They are also used as precise 'standard candles' to measure the distances to galaxies. While there is general agreement that a type Ia supernova is produced by an exploding white dwarf star, no progenitor system has ever been directly observed. Significant effort has gone into searching for circumstellar material to help discriminate between the possible kinds of progenitor systems, but no such material has hitherto been found associated with a type Ia supernova. Here we report the presence of strong hydrogen emission associated with the type Ia supernova SN2002ic, indicating the presence of large amounts of circumstellar material. We infer from this that the progenitor system contained a massive asymptotic-giant-branch star that lost several solar masses of hydrogen-rich gas before the supernova explosion.

Original languageEnglish (US)
Pages (from-to)651-654
Number of pages4
Issue number6949
StatePublished - Aug 7 2003

ASJC Scopus subject areas

  • General


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