We present an analysis of three new pulsating subdwarf B stars discovered in the SuperWASP archive. Two of the stars, J1938+5609 and J0902-0720, are p-mode pulsators; J1938+5609 shows a pulsation at 231.62 d−1 (P=373 s; 2681 μHz) with an amplitude of 4 mmag, whereas J0902-0720 pulsates at frequencies 636.74 d−1 (P=136 s; 7370 μHz) and 615.34 d−1 (P=140 s; 7122 μHz), with amplitudes 7.27 and 1.53 mmag, respectively. The third star, J2344-3427, is a hybrid pulsator with a p-mode frequency at 223.16 d−1 (P=387 s; 2583 μHz) and a corresponding amplitude of 1.5 mmag, and g modes in the frequency range 8.68−28.56 d−1 (P=3025−9954 s; 100−331μHz) and amplitudes between 0.76 and 1.17 mmag. Spectroscopic results place J1938+5609 and J2344-3427 among the long-period or hybrid pulsators, suggesting there may be further modes in these stars below our detection limits, with J0902-0720 placed firmly amongst the p-mode pulsators.
@article{arxiv.1701.02761,
title = {Three new pulsating sdB stars discovered with SuperWASP},
author = {Daniel L. Holdsworth and Roy H. Østensen and Barry Smalley and John H. Telting},
journal= {arXiv preprint arXiv:1701.02761},
year = {2017}
}
Comments
13 pages, 8 figures, 4 tables, accepted for publication in MNRAS