The WD+He star binaries as the progenitors of type Ia supernovae
Abstract: Employing the MESA stellar evolution code, we computed He accretion onto carbon-oxygen white dwarfs (CO WDs).We found two possible outcomes for models in which the WD steadily grows in mass towards the Chandrasekhar limit. For relatively low He-accretion rates carbon ignition occurs in the center, leading to a type Ia supernova (SN Ia) explosion, whereas for relatively high accretion rates carbon is ignited off-center, probably leading to collapse. Thus the parameter space producing SNe Ia is reduced compared to what was assumed in earlier papers, in which the possibility of off-center ignition was ignored. We then applied these results in binary population synthesis modelling, finding a modest reduction in the expected birthrate of SNe Ia resulting from the WD+He star channel.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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The WD+He star binaries as the progenitors of type Ia supernovae ; volume:26 ; number:1 ; year:2017 ; pages:160-163 ; extent:4
Open astronomy ; 26, Heft 1 (2017), 160-163 (gesamt 4)
- Creator
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Wang, Bo
Liu, Dongdong
- DOI
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10.1515/astro-2017-0018
- URN
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urn:nbn:de:101:1-2405271618029.411971554347
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:46 AM CEST
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Associated
- Wang, Bo
- Liu, Dongdong
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