2017
DOI: 10.1515/astro-2017-0018
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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… Show more

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