| Sub-luminous type Ia supernovae from the mergers of equal-mass white dwarfs with mass approximately 0.9M[symbol: see text]. | |
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MedLine Citation:
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PMID: 20054390 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Type Ia supernovae are thought to result from thermonuclear explosions of carbon-oxygen white dwarf stars. Existing models generally explain the observed properties, with the exception of the sub-luminous 1991bg-like supernovae. It has long been suspected that the merger of two white dwarfs could give rise to a type Ia event, but hitherto simulations have failed to produce an explosion. Here we report a simulation of the merger of two equal-mass white dwarfs that leads to a sub-luminous explosion, although at the expense of requiring a single common-envelope phase, and component masses of approximately 0.9M[symbol: see text]. The light curve is too broad, but the synthesized spectra, red colour and low expansion velocities are all close to what is observed for sub-luminous 1991bg-like events. Although the mass ratios can be slightly less than one and still produce a sub-luminous event, the masses have to be in the range 0.83M[symbol: see text] to 0.9M[symbol: see text]. |
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Authors:
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R?diger Pakmor; Markus Kromer; Friedrich K R?pke; Stuart A Sim; Ashley J Ruiter; Wolfgang Hillebrandt |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Nature Volume: 463 ISSN: 1476-4687 ISO Abbreviation: Nature Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2010-01-07 Completed Date: 2010-02-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0410462 Medline TA: Nature Country: England |
Other Details:
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Languages: eng Pagination: 61-4 Citation Subset: - |
Affiliation:
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Max-Planck-Institut f?r Astrophysik, Karl-Schwarzschild Strasse 1, 85748 Garching, Germany. rpakmor@mpa-garching.mpg.de |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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