The Recurrent Nova U Scorpii - A Type Ia Supernova Progenitor

(2) University of Southampton; 3) ((1) University of Sheffield; (3) Winchester College; D. A. Smith (1; S. P. Littlefair (1); T. D. Thoroughgood (1); T. R. Marsh (2); UK; UK); V. S. Dhillon (1)

arxiv: astro-ph/0109553 · v1 · submitted 2001-09-28 · 🌌 astro-ph

The Recurrent Nova U Scorpii - A Type Ia Supernova Progenitor

T. D. Thoroughgood (1) , V. S. Dhillon (1) , S. P. Littlefair (1) , T. R. Marsh (2) , D. A. Smith (1 , 3) ((1) University of Sheffield , UK , (2) University of Southampton

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(3) Winchester College UK)

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keywords novarecurrentdwarfmassprogenitorsupernovatypewhite

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We derive the mass of the white dwarf in the eclipsing recurrent nova U Sco from the radial velocity semi-amplitudes of the primary and secondary stars. Our results give a high white dwarf mass of M_1 = 1.55 \pm 0.24M_\odot, consistent with the thermonuclear runaway model of recurrent nova outbursts. We confirm that U Sco is the best Type Ia supernova progenitor known, and predict that the time to explosion is within ~700,000 years.

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The Recurrent Nova U Scorpii - A Type Ia Supernova Progenitor

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