Age determination of close binary systems

Details Age determination of close binary systems Age determination of close binary systems

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984s%26w....23..124m&link_type=abstract

Sterne und Weltraum (ISSN 0039-1263), vol. 23, March 1984, p. 124, 125. In German.

Physics

Eclipsing Binary Stars, Stellar Evolution, Chronology, Metallicity, Radii, Stellar Mass, Stellar Temperature

Scientific paper

The testing of stellar evolution and structure hypotheses with data from binary systems is discussed and illustrated for the eclipsing binary CW Eridani. The fundamental parameters of convective-transport stellar models (mass, radius, surface temperature, metallicity ratio, mixing length, and scale height of the pressure layers in turbulent zones) are characterized, and the precision of the mass, temperature, and radius measurements obtainable for eclipsing binaries is explained. The evolution calculations of Hejlesen (1980) are presented in diagrams and analyzed, emphasizing the effects of differing metallicity ratios and assumed values of the mixing-length/scale-height ratio (l/H = 1.5 or 2.0) and the difficulties involved in establishing isochronic lines. Data for CW Eri are plotted in a similar diagram, and a consistent solution is obtained only for l/H = 2.0: the age of the system is 1.3-1.6 Gyr.

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