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When binaries keep track of recent nucleosynthesis

  • D. Karinkuzhi (a1) (a2), S. Van Eck (a1), A. Jorissen (a1), S. Goriely (a1), L. Siess (a1), T. Merle (a1), A. Escorza (a1) (a3), M. Van der Swaelmen (a1), H. M. J. Boffin (a4), T. Masseron (a5) (a6), S. Shetye (a1) (a3) and B. Plez (a7)...

Abstract

We determine Zr and Nb elemental abundances in barium stars to probe the operation temperature of the s-process that occurred in the companion asymptotic giant branch (AGB) stars. Along with Zr and Nb, we derive the abundances of a large number of heavy elements. They provide constraints on the s-process operation temperature and therefore on the s-process neutron source. The results are then compared with stellar evolution and nucleosynthesis models. We compare the nucleosynthetic profile of the present sample stars with those of CEMP-s, CEMP-rs and CEMP-r stars. One barium star of our sample is potentially identified as the highest-metallicity CEMP-rs star yet discovered.

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Masseron, T., Johnson, J. A., Plez, B., Van Eck, S., Primas, F., Goriely, S., & Jorissen, A. 2010, A&A, 509, A93
Masseron, T., Merle, T., & Hawkins, K., 2016, ascl, 1605.004
Neyskens, P., Van Eck, S., Jorissen, A., Goriely, S., Siess, S., Plez, B. 2015, nature, 517, 174
Raskin, G., van Winckel, H., Hensberge, H., Jorissen, A., Lehmann, H., Waelkens, Avila, G., de Cuyper, J.-P., et al. 2011, A&A, 526, A69
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When binaries keep track of recent nucleosynthesis

  • D. Karinkuzhi (a1) (a2), S. Van Eck (a1), A. Jorissen (a1), S. Goriely (a1), L. Siess (a1), T. Merle (a1), A. Escorza (a1) (a3), M. Van der Swaelmen (a1), H. M. J. Boffin (a4), T. Masseron (a5) (a6), S. Shetye (a1) (a3) and B. Plez (a7)...

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