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Search for tidally driven abundance anomalies in Am stars

Published online by Cambridge University Press:  02 March 2005

M. Feňovčík ,
J. Budaj ,
I. Iliev ,
M.T. Richards  and
I. Barzova
M. Feňovčík
Affiliation:
University of Pavol Jozef Safarik, Košice, Slovakia Space Research Organization of the Netherlands, Sorbonnelaan 2, 3548 CA Utrecht, Netherlands, email: m.fenovcik@sron.nl
J. Budaj
Affiliation:
Dept. of Astronomy and Astrophysics, Penn State Univ., Davey Lab. 525, University Park, 16802 PA, USA, email: budaj@astro.psu.edu, mtr@astro.psu.edu Astronomical Institute of the Slovak Academy of Sciences, 059 60 Tatranská Lomnica, Slovakia
I. Iliev
Affiliation:
Institute of Astronomy, National Astronomical Observatory Rozhen, P.O.Box 136, BG-4700 Smolyan, Bulgaria, email: iliani@astro.bas.bg, rozhen@mbox.digsys.bg
M.T. Richards
Affiliation:
Dept. of Astronomy and Astrophysics, Penn State Univ., Davey Lab. 525, University Park, 16802 PA, USA, email: budaj@astro.psu.edu, mtr@astro.psu.edu
I. Barzova
Affiliation:
Institute of Astronomy, National Astronomical Observatory Rozhen, P.O.Box 136, BG-4700 Smolyan, Bulgaria, email: iliani@astro.bas.bg, rozhen@mbox.digsys.bg
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Abstract

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High $S/N$, high resolution CCD spectra of 10 Am binaries with different orbital elements, rotation and atmospheric parameters obtained with the 2-m telescope of NAO Rozhen (Bulgaria) were analyzed. We carried out preliminary abundance analyses of these stars and studied the possible dependences of abundance anomalies and [Ca/Fe] on their values of effective temperature, $v\sin i$, orbital period, and eccentricity. There are weak trends of [Ca/Fe] increasing with $v\sin i$ and decreasing with eccentricity and orbital period. [Ca] seems to be increasing with effective temperature, and [Fe] decreasing with $v\sin i$ and increasing with eccentricity. However we need to study more stars to confirm and disentangle the possible trends.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Keywords

Techniques: spectroscopicstars: abundancesstars: atmospheresbinaries: spectroscopicstars: chemically peculiarstars: rotation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS224 , July 2004 , pp. 749 - 756
Copyright
© 2004 International Astronomical Union