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Astron. Astrophys. 351, 963-972 (1999)

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Orbital elements and abundance analyses of the double-lined spectroscopic binary [FORMULA] Andromedae

T.A. Ryabchikova 1, V.P. Malanushenko 2,3 and S.J. Adelman 4,5

1 Institute of Astronomy, Russian Academy of Sciences, Pyatnitskaya str. 48, 109017 Moscow, Russia
2 Crimean Astrophysical Observatory, 334413 Nauchny, Crimea, Ukraine
3 Isaac Newton Institute of Chile, Crimean Branch
4 Department of Physics, The Citadel, 171 Moultrie Street, Charleston, SC 29409, USA
5 Visiting Observer, Dominion Astrophysical Observatory, National Research Council of Canada

Received 24 November 1998 / Accepted 6 May 1999

Abstract

We performed a spectroscopic study of the SB2 Mercury-Manganese star [FORMULA] And with Reticon and CCD spectra obtained at the Crimean and the Dominion Astrophysical Observatories. Our measurements particularly of the secondary's radial velocities resulted in improved orbital elements with a spectroscopic mass ratio [FORMULA] = 0.50 [FORMULA] 0.03 which is in good agreement with the mass-luminosity solution for this system. Elemental abundance analyses using synthetic spectra show that the primary has elemental abundances somewhat similar to those of other HgMn stars while the cooler secondary probably is a metallic-line star. The possible variability of Hg II [FORMULA]3984 is discussed.

Key words: stars: abundances – stars: atmospheres – stars: chemically peculiar – stars: binaries: spectroscopic – stars: individual: ff And

Send offprint requests to: V. Malanushenko

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© European Southern Observatory (ESO) 1999

Online publication: November 16, 1999
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