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The TGAS HR diagram of barium stars

Published online by Cambridge University Press:  07 March 2018

A. Escorza Open the ORCID record for A. Escorza [Opens in a new window] ,
H. M. J. Boffin ,
A. Jorissen ,
L. Siess ,
S. Van Eck ,
S. Shetye ,
D. Pourbaix  and
H. Van Winckel
A. Escorza
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium email: ana.escorza@kuleuven.be Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, Campus Plaine C.P. 226, Boulevard du Triomphe, B-1050 Bruxelles, Belgium
H. M. J. Boffin
Affiliation:
ESO, Garching bei München, Germany
A. Jorissen
Affiliation:
Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, Campus Plaine C.P. 226, Boulevard du Triomphe, B-1050 Bruxelles, Belgium
L. Siess
Affiliation:
Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, Campus Plaine C.P. 226, Boulevard du Triomphe, B-1050 Bruxelles, Belgium F.R.S.-FNRS, Belgium
S. Van Eck
Affiliation:
Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, Campus Plaine C.P. 226, Boulevard du Triomphe, B-1050 Bruxelles, Belgium
S. Shetye
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium email: ana.escorza@kuleuven.be Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, Campus Plaine C.P. 226, Boulevard du Triomphe, B-1050 Bruxelles, Belgium
D. Pourbaix
Affiliation:
Institut d'Astronomie et d'Astrophysique, Université Libre de Bruxelles, Campus Plaine C.P. 226, Boulevard du Triomphe, B-1050 Bruxelles, Belgium F.R.S.-FNRS, Belgium
H. Van Winckel
Affiliation:
Institute of Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium email: ana.escorza@kuleuven.be
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Abstract

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Barium stars are formed via binary interaction with a former AGB companion. Observations are needed to constrain theoretical models and better understand their evolution and surface composition. We present the HR diagram of Ba and related stars, using the recently released TGAS parallaxes, and the mass distribution of the Ba giants that we derived from it.

Keywords

stars: binariesstars: evolutionHertzsprung-Russell diagram
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S330: Astrometry and Astrophysics in the Gaia sky , April 2017 , pp. 323 - 324
Copyright
Copyright © International Astronomical Union 2018 

References

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