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Kinematic Properties of Chromospheric Active Binary Stars

Published online by Cambridge University Press:  23 April 2012

M. Tüysüz ,
F. Soydugan ,
S. Bilir  and
O. Demircan
M. Tüysüz
Affiliation:
Çanakkale University Observatory, Çanakkale, Turkey
F. Soydugan
Affiliation:
Çanakkale University Observatory, Çanakkale, Turkey
S. Bilir
Affiliation:
Istanbul University Observatory, Istanbul, Turkey email: [email protected]
O. Demircan
Affiliation:
Çanakkale University Observatory, Çanakkale, Turkey
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Abstract

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The kinematic behaviour of 362 chromospherically active binary stars (CABs) in the solar neighbourhood were investigated. The Third CABs Catalog by Eker et al. (2008) was used as the main source. The spatial distribution and the components of the Galactic space velocities of the programme stars were determined. The effects of differential rotation and Local Standard of Rest (LSR) were corrected for all systems.

Forty probable moving group (MG) members were determined by Eggen's criteria. The kinematic age of the young systems, which are probable members of MGs, was calculated as 0.79 (0.21) Gyr and the rest of 322 field stars were found to have a kinematic age of 4.38 (1.1) Gyr. Field CABs were separated into two sub-groups: dwarf systems, which were formed by main sequence (dwarf) stars, and evolved systems included at least one evolved (giant or sub-giant) component. The kinematic age of 134 dwarf systems was calculated as 4.69 (0.75) Gyr and 4.15 (1.29) Gyr for 188 evolved CABs.

Keywords

active starskinematickinematic age
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S282: From Interacting Binaries to Exoplanets: Essential Modeling Tools , July 2011 , pp. 458 - 459
Copyright
Copyright © International Astronomical Union 2012

References

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