Mass loss in semi-detached binaries

Abhyankar, K. D. (1984) Mass loss in semi-detached binaries Astrophysics and Space Science, 99 (1-2). pp. 355-361. ISSN 0004-640X

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Pre-Main-Sequence contracting objects, post-Main-Sequence expanding stars and mass-losing components of semi-detached systems all occupy more or less the same region in the conventional H-R-diagram. We make a transformation to variables Δ(logL) and Δ(logTe), where Δ is the difference between the observed quantity, logL or logTe, and the value of that quantity which a star of the same mass would have on the empirical Main Sequence. It is demonstrated that a plot between the new variables clearly separates the mass-losing stars from other objects which is essentially an effect of the increasing abundance of helium relative to hydrogen.

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