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Observations of ζ Aurigae Stars and Their Interpretation

Published online by Cambridge University Press:  08 February 2017

H. G. Groth
H. G. Groth*
Affiliation:
Universitäts-Sternwarte Munchen, Institut für Astronomie und Astrophysik

Abstract

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A summary of information on the extended atmosphere of the K component coming from three eclipsing binaries consisting of a K supergiant and a main sequence B star. Various anomalies exist: (1) Discrepancy between electron density and metallic density inferred from observations, noting that the electrons should come from the metals. This suggests a cloud structure in the atmosphere. (2) Anomalous excitation temperatures and populations of the second quantum level of hydrogen suggests a solar-chromosphere type behavior for these K atmospheres. (3) Significant changes in the profiles of the Ca+ lines from one eclipse to another. The necessity to distinguish between effects coming from radiation of the B star on the K atmosphere and chromosphericlike effects is emphasized.

Keywords

chromosphersuper-excitatioRussell-Adams effecchromospheric clouds
Type
Part C. Chromospheres and Coronae of Stars
Information
International Astronomical Union Colloquium , Volume 2: Spectrum Formation in Stars With Steady-State Extended Atmospheres , August 1970 , pp. 283 - 289
Copyright
Copyright © 1970

References

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Wellmann, P. 1939, Veröffentl, d. Universitäts-Sternwarte Babelsberg XII, 4.Google Scholar
Wilson, O. C. 1960, Stars and Stellar Systems, 6, 436 (Compilation of all papers known to 1960).Google Scholar