Detection of Photometric Variations in the sdBV Star JL 166
Solar and Stellar Astrophysics
2015-05-13 v1
Abstract
We report the discovery of oscillations in the hot subdwarf B star JL 166 from time-series photometry using the Goodman Spectrograph on the 4.1-m Southern Astrophysical Research Telescope. Previous spectroscopic and photometric observations place the star near the hot end of the empirical sdB instability strip and imply the presence of a cool companion. Amplitude spectra of the stellar light curve reveal at least 10 independent pulsation modes with periods ranging from 97 to 178 s and amplitudes from 0.9 to 4 mma. We adopt atmospheric parameters of T_eff = 34350 K and log g = 5.75 from a model atmosphere analysis of our time-averaged, medium-resolution spectrum.
Keywords
Cite
@article{arxiv.0906.2566,
title = {Detection of Photometric Variations in the sdBV Star JL 166},
author = {B. N Barlow and B. H. Dunlap and A. E. Lynas-Gray and J. C. Clemens},
journal= {arXiv preprint arXiv:0906.2566},
year = {2015}
}
Comments
18 pages, 6 figures, accepted for publication in the Astronomical Journal