Whitehouse, LJ;
Farihi, J;
Howarth, ID;
Mancino, S;
Walters, N;
Swan, A;
Wilson, TG;
(2021)
Carbon-enhanced stars with short orbital and spin periods.
Monthly Notices of the Royal Astronomical Society
, 506
(4)
pp. 4877-4892.
10.1093/mnras/stab1913.
Preview |
Text
stab1913 (1).pdf Download (2MB) | Preview |
Abstract
Many characteristics of dwarf carbon stars are broadly consistent with a binary origin, including mass transfer from an evolved companion. While the population overall appears to have old-disc or halo kinematics, roughly 2 per cent of these stars exhibit Hα emission, which in low-mass main-sequence stars is generally associated with rotation and relative youth. Its presence in an older population therefore suggests either irradiation or spin-up. This study presents time-series analyses of photometric and radial-velocity data for seven dwarf carbon stars with Hα emission. All are shown to have photometric periods in the range 0.2–5.2 d, and orbital periods of similar length, consistent with tidal synchronisation. It is hypothesised that dwarf carbon stars with emission lines are the result of close-binary evolution, indicating that low-mass, metal-weak or metal-poor stars can accrete substantial material prior to entering a common-envelope phase.
| Type: | Article |
|---|---|
| Title: | Carbon-enhanced stars with short orbital and spin periods |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stab1913 |
| Publisher version: | https://doi.org/10.1093/mnras/stab1913 |
| Language: | English |
| Additional information: | Copyright © 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited. |
| 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/10131166 |
Loading...
Loading...Loading...Loading...Archive Staff Only
 |
View Item |
