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Mass loss in semi-detached binaries

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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 (logT e), where Δ is the difference between the observed quantity, logL or logT e, 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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Abhyankar, K.D. Mass loss in semi-detached binaries. Astrophys Space Sci 99, 355–361 (1984). https://doi.org/10.1007/BF00650259

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  • Hydrogen
  • Helium
  • Mass Loss
  • Main Sequence
  • Contracting Object