Why are binary stars so important for the theory of stellar evolution

Details Why are binary stars so important for the theory of stellar evolution Why are binary stars so important for the theory of stellar evolution

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976msngr...7...15j&link_type=abstract

ESO Messenger, Dec. 1976, p. 15, 16.

Astronomy and Astrophysics

Astronomy

Astronomical Photometry, Binary Stars, Hertzsprung-Russell Diagram, Stellar Evolution, Stellar Models, Accuracy, Brightness Temperature, Chemical Composition, Computer Techniques, Eclipsing Binary Stars, Galaxies, Light Curve, Radial Velocity, Stellar Motions

Scientific paper

The way in which observations of binary stars are used to verify the accuracy of stellar models is discussed. The problem of deriving the helium content of an unevolved binary of about 2 solar masses with an accuracy of 0.03 is cited as an example. The binary systems SZ Centauri and AI Hydrae are noted as systems which pose interesting problems for theoreticians. It is shown that the Delta Scuti star AI Hydrae has a pulsation constant whose value corresponds to a radial first-overtone pulsation.

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