Progenitors of Type Ia Supernovae: Binary Stars with White Dwarf Companions

Details Progenitors of Type Ia Supernovae: Binary Stars with White Dwarf Companions Progenitors of Type Ia Supernovae: Binary Stars with White Dwarf Companions

2007-03-15

arxiv.org/abs/astro-ph/0703415v1

NewAstron.Rev.51:524-538,2007

Astronomy and Astrophysics

Astrophysics

34 pages, to appear in New Astronomy Reviews

Scientific paper

10.1016/j.newar.2007.03.001

Type Ia SNe (SNe Ia) are thought to come from carbon-oxygen white dwarfs that accrete mass from binary companions until they approach the Chandrasekhar limit, ignite carbon, and undergo complete thermonuclear disruption. A survey of the observed types of binaries that contain white dwarfs is presented. We propose that certain systems that seem most promising as SN Ia progenitors should be more intensively observed and modeled, to determine whether the white dwarfs in these systems will be able to reach the Chandrasekhar limit. In view of the number of promising single-degenerate systems and the dearth of promising double-degenerate systems, we suspect that single-degenerates produce most or perhaps all SNe Ia, while double-degenerates produce some or perhaps none.

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