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

    271970.pdf (16.73Mb)
    Access Status
    Open access
    Authors
    Vennes, S.
    Nemeth, P.
    Kawka, Adela
    Thorstensen, J.
    Khalack, V.
    Ferrario, L.
    Alper, E.
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Vennes, S. and Nemeth, P. and Kawka, A. and Thorstensen, J. and Khalack, V. and Ferrario, L. and Alper, E. 2017. An unusual white dwarf star may be a surviving remnant of a subluminous Type Ia supernova. Science. 357 (6352): pp. 680-683.
    Source Title
    Science
    DOI
    10.1126/science.aam8378
    ISSN
    0036-8075
    School
    Curtin Institute of Radio Astronomy (Physics)
    Remarks

    This is the author's version of the work. It is posted here by permission of the AAAS for personal use, not for redistribution. The definitive version was published in Science Vol. 357 (2017), 10.1126/science.aam8378

    URI
    http://hdl.handle.net/20.500.11937/71744
    Collection
    • Curtin Research Publications
    Abstract

    Subluminous Type Ia supernovae, such as the Type Iax–class prototype SN 2002cx, are described by a variety of models such as the failed detonation and partial deflagration of an accreting carbon-oxygen white dwarf star or the explosion of an accreting, hybrid carbon-oxygen-neon core. These models predict that bound remnants survive such events with, according to some simulations, a high kick velocity. We report the discovery of a high proper motion, low-mass white dwarf (LP 40-365) that travels at a velocity greater than the Galactic escape velocity and whose peculiar atmosphere is dominated by intermediate-mass elements. Strong evidence indicates that this partially burnt remnant was ejected following a subluminous Type Ia supernova event. This supports the viability of single-degenerate supernova progenitors.

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