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Fundamental parameters of “normal” B stars in the solar neighborhood

Published online by Cambridge University Press:  12 July 2011

Maria-Fernanda Nieva  and
Norbert Przybilla
Maria-Fernanda Nieva
Affiliation:
Max-Planck-Institut für Astrophysik, Postfach 1317, D-85741 Garching, Germany email: [email protected]
Norbert Przybilla
Affiliation:
Dr. Karl Remeis-Observatory Bamberg & ECAP, University Erlangen-Nuremberg, Sternwartstr. 7, D-96049 Bamberg, Germany email: [email protected]
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Abstract

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Understanding phenomena of activity in stars, like pulsations or magnetism, benefits from systematic comparisons of some key physical parameters of active with those of “normal” stars. Here we concentrate on a careful derivation of fundamental parameters of a well selected sample of 27 “normal” B stars in nearby OB associations and in the field. A quantitative spectral analysis methodology based on hybrid non-LTE techniques is applied to high-resolution and high-S/N spectra. Results derived from the pure spectroscopic analysis are compared to other data/indicators of stellar parameters in order to prove the reliability of the method. Very good agreement is obtained among all of them. Besides the fundamental parameters, the chemical composition of the stars is also determined at high precision, turning out to be highly homogeneous. A comparative study of the present results with those of well known active massive stars will help to improve our understanding of the driving mechanisms of activity.

Keywords

stars: abundancesstars: atmospheresstars: early-typestars: fundamental parameters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 566 - 570
Copyright
Copyright © International Astronomical Union 2011

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