Spectroscopically Peculiar Type Ia Supernovae and Implications for Progenitors | Zendy

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Spectroscopically Peculiar Type Ia Supernovae and Implications for Progenitors

Author(s) -

David Branch

Publication year - 2001

Publication title -

publications of the astronomical society of the pacific

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.294

H-Index - 172

eISSN - 1538-3873

pISSN - 0004-6280

DOI - 10.1086/318614

Subject(s) - supernova , astrophysics , physics , progenitor , type (biology) , astronomy , progenitor cell , geology , biology , paleontology , stem cell , genetics

In a recent paper Li et al. (2000) reported that 36 percent of 45 Type Iasupernovae (SNe Ia) discovered since 1997 in two volume-limited supernovasearches were spectroscopically peculiar, and they suggested that because thispeculiarity rate is higher than that reported for an earlier observationalsample by Branch et al. (1993), it is now more likely that SNe Ia are producedby more than one kind of progenitor. In this paper I discuss and clarify thedifferences between the results of Li et al. and Branch et al. and I suggestthat multiple progenitor systems are now less likely than they were before.Comment: 11 pages; accepted by PASP; several minor changes, 2 references added, main conclusions unchange

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