Feige 24 - Wind/flare accretion by a hot DAZ1 degenerate

Details Feige 24 - Wind/flare accretion by a hot DAZ1 degenerate Feige 24 - Wind/flare accretion by a hot DAZ1 degenerate

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...286..760s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 286, Nov. 15, 1984, p. 760-762.

Other

23

Hot Stars, Stellar Atmospheres, Stellar Flares, Stellar Mass Accretion, Stellar Winds, White Dwarf Stars, Atmospheric Composition, Binary Stars, Ionic Diffusion, Metal Ions, Red Dwarf Stars, Stellar Envelopes, Stellar Models

Scientific paper

Model stellar envelopes have been constructed in order to represent the outer layers of the hot DAZ white dwarf component of the spectroscopic binary Feige 24. The results of the calculations show that the metals, discovered by Dupree and Raymond (1983) should diffuse rapidly into the interior unless a continuous source of these elements is present in the system. It is proposed that this source is a stellar wind from the red dwarf component of this detached close binary, and diffusion and accretion calculations are provided to support the hypothesis. Recent EXOSAT observations of Feige 24 provide additional evidence to test the accretion hypothesis. The accreting material may provide significant X-ray opacity for this object. This discussion is extended to other similar M dwarf-white dwarf close binary systems.

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