Holdsworth, D, Ostensen, R, Smalley, B ORCID: https://orcid.org/0000-0002-3456-087X and Telting, J (2017) Three new pulsating sdB stars discovered with SuperWASP. Monthly Notices of the Royal Astronomical Society, 466 (4). 5020 -5032.

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Abstract

We present an analysis of three new pulsating subdwarf B stars discovered in the Super Wide Angle Search for Planets 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 (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.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: asteroseismology, techniques, photometric, stars, oscillations, subdwarfs
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Q Science > QB Astronomy > QB799 Stars
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Depositing User: Symplectic
Date Deposited: 24 Mar 2017 09:11
Last Modified: 20 Mar 2019 11:44
URI: http://eprints.keele.ac.uk/id/eprint/3055

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