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Supersoft X-ray Sources. Basic Parameters

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arxiv astro-ph/0603430 v1 pith:O2R3TGQ7 submitted 2006-03-16 astro-ph

Supersoft X-ray Sources. Basic Parameters

classification astro-ph
keywords sourcesmodelparameterssupersoftwhitedwarfsmassesx-ray
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The parameters of ten supersoft X-ray sources (RX J0439.8-6809, RX J0513.9-6951, RX J0527.8-6954, CAL 87, CAL 83, 1E 0035.4-7230, RX J0048.4-7332, 1E 0056.8-7154, RX J0019.8 +2156, RX J0925.7-4758) observed by ROSAT obtained using blanketing LTE model atmospheres are analyzed. The consistency of the resulting parameters with a model with stable/recurrent burning on the surface of the white dwarf is studied. The luminosity and sizes of seven of the sources are in good agreement with this model. The masses of the white dwarfs in these sources are estimated. A formula that can be used to estimate the masses of white dwarfs in classical supersoft sources based on their effective temperatures is presented.

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