Evolutionary state of W UMa-type systems

Details Evolutionary state of W UMa-type systems Evolutionary state of W UMa-type systems

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.189..237r&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 189, no. 2, March 1992, p. 237-262.

Astronomy and Astrophysics

Astrophysics

13

Binary Stars, F Stars, G Stars, Stellar Evolution, Stellar Spectra, Hertzsprung-Russell Diagram, Stellar Luminosity, Stellar Mass, Stellar Spectrophotometry

Scientific paper

The evolutionary status of a sample of 31 W UMa-type systems is discussed on the basis of their positions in the H-R, mass-radius and mass-luminosity diagrams. The absolute elements of these systems are evaluated by use of their spectroscopic and photometric data. This gives the opportunity to make different H-R, mass-radius, and mass-luminosity diagrams, according to the method used, and compare the results. Moreover, from the spectral type-period diagram of those systems that have spectral types from O to G2 it was found that all of them lie in the evolved region.

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