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Physical Parameters and Chemical Composition of Components of the Am-Type Binary System RR Lyncis

Published online by Cambridge University Press:  12 April 2016

L.S. Lyubimkov  and
T.M. Rachkovskaya
L.S. Lyubimkov
Affiliation:
Crimean Astrophysical Observatory, Crimea, p.Nauchny, 334413, Ukraine
T.M. Rachkovskaya
Affiliation:
Crimean Astrophysical Observatory, Crimea, p.Nauchny, 334413, Ukraine

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Duplicity is a very widespread phenomenon among Am-stars. For instance, Abt (1961) investigating 25 such stars found out that 22 of them are spectroscopic binaries. However this important phenomenon is ignored usually in chemical composition investigations of Am-stars. Consequently some “mean” element abundances are determined, which can noticeably differ from real abundances in atmospheres of components. Moreover false chemical anomalies can appear, as shown by the theoretical modelling of spectra of binary stars (Lyubimkov, 1989, 1992). Meanwhile accurate data on chemical composition of Am-stars must be considered as observational test for any hypothesis suggested for explanation of these objects.

Type
I. General Properties of CP Stars
Information
International Astronomical Union Colloquium , Volume 138: Peculiar versus Normal Phenomena in A-Type and Related Stars , 1993 , pp. 192 - 196
Copyright
Copyright © Astronomical Society of the Pacific 1993

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