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Fundamental Parameters and the Helium Content of Eclipsing Spectroscopic Binaries

Published online by Cambridge University Press:  14 August 2015

H.E. Jørgensen
H.E. Jørgensen*
Affiliation:
Copenhagen Observatory

Extract

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Today we know accurate masses, radii, surface gravities and luminosities or effective temperatures of a very small number of stars. There are several reasons for deriving accurate parameters of stars. I shall mention only four problems:

  1. (i) checking stellar evolution calculations, particularly calculations of isochrones, using binaries,

  2. (ii) derivation of helium content in stars of different age,

  3. (iii) checking log g derived from photometry and stellar atmosphere calculations,

  4. (iv) determination of accurate positions in the HR diagram to get an independent check on calibrations of photometric systems.

Type
Poster Session
Information
Symposium - International Astronomical Union , Volume 80: The HR Diagram , 1978 , pp. 433 - 436
Copyright
Copyright © Reidel 1978 

References

Nissen, P.E. (1976). Astron. Astrophys. 50, 343.Google Scholar
Wood, D.B. (1971). Astron. J. 76, 701.Google Scholar