Whitehouse, LJ;
Farihi, J;
Green, PJ;
Wilson, TG;
Subasavage, JP;
(2018)
Dwarf carbon stars are likely metal-poor binaries and unlikely hosts to carbon planets.
Monthly Notices of the Royal Astronomical Society
, 479
(3)
pp. 3873-3878.
10.1093/mnras/sty1622.
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Abstract
Dwarf carbon stars make up the largest fraction of carbon stars in the Galaxy with ≈ 1200 candidates known to date primarily from the Sloan Digital Sky Survey. They either possess primordial carbon-enhancements, or are polluted by mass transfer from an evolved companion such that C/O is enhanced beyond unity. To directly test the binary hypothesis, a radial velocity monitoring survey has been carried out on 28 dwarf carbon stars, resulting in the detection of variations in 21 targets. Using Monte Carlo simulations, this detection fraction is found to be consistent with a 100 per cent binary population and orbital periods on the order of hundreds of days. This result supports the post-mass transfer nature of dwarf carbon stars, and implies they are not likely hosts to carbon planets.
| Type: | Article |
|---|---|
| Title: | Dwarf carbon stars are likely metal-poor binaries and unlikely hosts to carbon planets |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/sty1622 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/sty1622 |
| Language: | English |
| Additional information: | © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This version is the version of record [delete as appropriate]. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | binaries: general – stars: chemically peculiar – stars: carbon. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10054965 |
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