An unusual white dwarf star may be a surviving remnant of a subluminous Type Ia supernova

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Science  18 Aug 2017:
Vol. 357, Issue 6352, pp. 680-683
DOI: 10.1126/science.aam8378

Unusual star may be supernova debris

Type Ia supernovae occur when a white dwarf star is completely destroyed in a thermonuclear explosion. Recently, another class of supernova has been found, dubbed type Iax; these look like type Ia but are much fainter and may be the result of only partial destruction of a white dwarf. In support of this notion, Vennes et al. found a white dwarf star in our Galaxy that is low-mass, is moving quickly, and has an unusual composition. These properties suggest that it could be the predicted leftover remains from a type Iax supernova.

Science, this issue p. 680

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