Type I supernovae, R Coronae Borealis stars, and the Crab Nebula
1978; IOP Publishing; Volume: 225; Linguagem: Inglês
10.1086/156484
ISSN1538-4357
Autores Tópico(s)Astronomy and Astrophysical Research
Resumoview Abstract Citations (59) References (56) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Type I supernovae, R Coronae Borealis stars, and the Crab Nebula. Wheeler, J. C. Abstract Present observations and theory point to Type I supernovae (SN I) as being old disk-population helium-rich red supergiants at the time of outburst. There is a class of stars which correspond to these specifications, the hydrogen-deficient carbon (Hd C) stars, the best known subclass of which are the R Coronae Borealis variables; hence these stars may be SN I progenitors. Within present rather large uncertainties the rate of production of Hd C stars is consistent with the rate of Type I supernovae in the Galaxy. Paczynski's (1971) suggestion that R Coronae Borealis stars are mixed, completely hydrogen-depleted stars of 1-2 solar masses may call for extended main-sequence lifetimes, which in turn would explain how stars with masses greater than the Chandrasekhar mass are only now evolving to explosive end points in elliptical galaxies. The Crab Nebula, being helium-rich, metal-poor, and apparently of only moderate mass, may also be related to this class of event. Publication: The Astrophysical Journal Pub Date: October 1978 DOI: 10.1086/156484 Bibcode: 1978ApJ...225..212W Keywords: Carbon Stars; Crab Nebula; R Coronae Borealis Stars; Supergiant Stars; Supernovae; Variable Stars; Abundance; Elliptical Galaxies; Red Giant Stars; Stellar Evolution; Stellar Mass; Astrophysics; Crab Nebula; R CrB Stars:Supernovae full text sources ADS | data products SIMBAD (6)
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