The gravity-darkening of highly distorted stars in close binary systems. VIII - Practical analysis of primary components filling the critical Roche lobe in semi-detached systems of reverse Algol-type

Details The gravity-darkening of highly distorted stars in close binary systems. VIII - Practical analysis of primary components filling the critical Roche lobe in semi-detached systems of reverse Algol-type The gravity-darkening of highly distorted stars in close binary systems. VIII - Practical analysis of primary components filling the critical Roche lobe in semi-detached systems of reverse Algol-type

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.191..267n&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 191, no. 2, May 1992, p. 267-282.

Statistics

Computation

5

Binary Stars, Gravitational Effects, Limb Darkening, Roche Limit, Stellar Systems, Astronomical Photometry, Computational Astrophysics, Light Curve

Scientific paper

The effective gravity-darkening is studied for the primary components filling the critical Roche lobe in eight semi-detached systems of reverse Algol-type. From the analysis of light variations outside eclipses, values of the exponent of gravity-darkening for these components have been deduced with the assumed values for the secondary components. The derived values of the exponent are found to be greater than the unity, confirming the previous result that the empirical value of the exponent of gravity-darkening for a component star filling the critical lobe is generally greater than the unity. It is also found that the values derived here for the primary components of the reverse Algols are distinctly smaller than those derived for the secondary components in semi-detached systems of normal Algol-type. Based on the mass-outflow darkening model, the present result would thus indicate that the rates of mass transfer in reverse Algols are not so high, and might imply that the systems are not in the rapid phase of mass transfer

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