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Binarity in CEMP-no stars

Published online by Cambridge University Press:  02 August 2018

Anke Arentsen ,
Else Starkenburg ,
Matthew D. Shetrone ,
Alan W. McConnachie ,
Éric Depagne  and
Kim A. Venn
Anke Arentsen
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), Potsdam, Germany
Else Starkenburg
Affiliation:
Leibniz-Institut für Astrophysik Potsdam (AIP), Potsdam, Germany
Matthew D. Shetrone
Affiliation:
McDonald Observatory, The University of Texas at Austin, Austin, USA
Alan W. McConnachie
Affiliation:
NRC Herzberg Institute of Astrophysics, Victoria, Canada
Éric Depagne
Affiliation:
Southern African Large Telescope/SAAO, Cape Town, South Africa
Kim A. Venn
Affiliation:
Department of Physics and Astronomy, University of Victoria, Victoria, Canada
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Abstract

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We monitor a sample of CEMP-no stars using the CFHT and SALT telescopes to gain additional knowledge about the possible binarity of these stars. This information is valuable for each individual star, and additionally it could be used to further constrain their binary fraction. We find two new CEMP-no binaries and four additional CEMP-no stars that show some indication of radial velocity variations, resulting in a CEMP-no binary fraction of ~20%.

Keywords

stars: chemically peculiarstars: binariestechniques: radial velocities
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S334: Rediscovering our Galaxy , July 2017 , pp. 273 - 274
Copyright
Copyright © International Astronomical Union 2018 

References

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