The short-period recurrent nova T Pyx; a wind-driven supersoft source?

Physics

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White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, T Pyx, Xmm-Newton Proposal 04034001

Scientific paper

The recurrent nova T Pyx is an intriguing accreting binary because of its prolific outburst behaviour, large quiescent luminosity, short orbital period and rapid orbital period evolution. An unusually high mass-accretion rate is implied and it has even been proposed continuous nuclear burning may occur on the accreting white dwarf. Systems with a massive white dwarf accreting at high rates are potential Type Ia progenitors. Our proposed XMM observations will establish if a wind-driven supersoft source scenario is indeed at play in T Pyx, or whether its X-ray luminosity demands an alternative evolutionary interpretation. These observations will thus have important implications for novae, super-soft sources and cataclysmic variable evolution.

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