Does SV Centauri harbor an accretion disk?

Details Does SV Centauri harbor an accretion disk? Does SV Centauri harbor an accretion disk?

Oct 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...379..721l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 379, Oct. 1, 1991, p. 721-728.

Astronomy and Astrophysics

Astrophysics

7

Accretion Disks, Eclipsing Binary Stars, Massive Stars, Ubv Spectra, Astronomical Models, Astronomical Photometry, Roche Limit, Stellar Mass Accretion, Stellar Spectra, Synthesis

Scientific paper

Light synthesis simulation of SV Cen UBV photometry by Drechsel et al. (1982) exhibits appreciable residuals. These residuals, together with large Roche model overcontact but also large calculated intercomponent temperature difference, suggests that the light synthesis Roche model is inapplicable. The substantial rate of period change indicates rapid mass transfer in a pre-mass-reversal system. An accretion disk surrounding a nearly normal size secondary provides a possible explanation of the photometric residuals. Excess radiation longward of 200 nm, by comparison with a spectrum synthesis simulation, provides qualitative support for the model. This model is inconsistent with the Lubow-Shu criterion for accretion disk formation. The text provides a speculative scenario showing why an accretion disk may nonetheless form.

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