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High-frequency A-type pulsators discovered using SuperWASP(star)dagger

Holdsworth, Daniel L.; Smalley, Barry; Gillon, M.; Clubb, K. I.; Southworth, John; Maxted, Pierre F. L.; Anderson, D. R.; Barros, S. C. C.; Collier Cameron, A.; Delrez, L.; Faedi, F.; Haswell, C. A.; Hellier, Coel; Horne, K.; Jehin, E.; Norton, A. J.; Pollacco, D.; Skillen, I.; Smith, A. M. S.; West, R. G.; Wheatley, P. J.

Authors

Daniel L. Holdsworth

M. Gillon

K. I. Clubb

D. R. Anderson

S. C. C. Barros

A. Collier Cameron

L. Delrez

F. Faedi

C. A. Haswell

K. Horne

E. Jehin

A. J. Norton

D. Pollacco

I. Skillen

A. M. S. Smith

R. G. West

P. J. Wheatley



Abstract

We present the results of a survey using the WASP archive to search for high-frequency pulsations in F-, A- and B-type stars. Over 1.5 million targets have been searched for pulsations with amplitudes greater than 0.5 millimagnitude. We identify over 350 stars which pulsate with periods less than 30?min. Spectroscopic follow-up of selected targets has enabled us to confirm 10 new rapidly oscillating Ap stars, 13 pulsating Am stars and the fastest known d Scuti star. We also observe stars which show pulsations in both the high-frequency domain and the low-frequency d Scuti range. This work shows the power of the WASP photometric survey to find variable stars with amplitudes well below the nominal photometric precision per observation.

Journal Article Type Article
Acceptance Date Jan 13, 2014
Online Publication Date Feb 15, 2014
Publication Date Apr 1, 2014
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 439
Issue 2
Pages 2078 - 2095
DOI https://doi.org/10.1093/mnras/stu094
Keywords asteroseismology; photometric; surveys; chemically peculiar; oscillations; variables
Publisher URL https://doi.org/10.1093/mnras/stu094

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