Line-profile variations in pulsating subdwarf-B stars as a pulsation mode diagnostic
Abstract
In previous attempts to perform seismic modelling of pulsating subdwarf-B stars, various mode identification techniques are used with uncertain results. We investigated a method so far neglected in sdB stars, but very successful for Main Sequence pulsators, that is, mode identification from the line-profile variations caused by stellar pulsation. We report the calculation of time-resolved synthetic spectra for sdB stars pulsating with various combinations of pulsation modes; these calculations were carried out over appropriate ranges of effective temperature, surface gravity and helium abundances. Preliminary tests using these synthetic line-profile variations demonstrated their potential for mode identification by comparison with observation.
Keywords
Cite
@article{arxiv.astro-ph/0511038,
title = {Line-profile variations in pulsating subdwarf-B stars as a pulsation mode diagnostic},
author = {C. Schoenaers and A. E. Lynas-Gray},
journal= {arXiv preprint arXiv:astro-ph/0511038},
year = {2007}
}
Comments
8 pages, 4 figures. To appear in Baltic Astronomy, proceedings of the 2nd meeting on Hot Subdwarf Stars, La Palma, June 2005