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Binarity in CEMP-no stars

  • Anke Arentsen (a1), Else Starkenburg (a1), Matthew D. Shetrone (a2), Alan W. McConnachie (a3), Éric Depagne (a4) and Kim A. Venn (a5)...

Abstract

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%.

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Arentsen, A., Starkenburg, E., Shetrone, M. D., et al. in prep.
Hansen, T. T., Andersen, J., Nordström, B., et al., 2016a, A&A, 586, A3
Hansen, T. T., Andersen, J., Nordström, B., et al., 2016b, A&A, 586, A160
Lee, Y. S., Beers, T. C., Masseron, T., et al., 2013, AJ, 146, 132
Starkenburg, E., Shetrone, M. D., McConnachie, A. W., & Venn, K. A., 2014, MNRAS, 441, 1217
Yoon, J., Beers, T. C., Placco, V. M., et al., 2016, ApJ, 833, 20
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Binarity in CEMP-no stars

  • Anke Arentsen (a1), Else Starkenburg (a1), Matthew D. Shetrone (a2), Alan W. McConnachie (a3), Éric Depagne (a4) and Kim A. Venn (a5)...

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