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SuperWASP observations of pulsating Am stars

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Smalley, B., Kurtz, D. W., Smith, A. M. S., Fossati, L., Anderson, D. R., Barros, S. C. C., Butters, O. W., Collier Cameron, A., Christian, D. J., Enoch, B. et al.
(2011) SuperWASP observations of pulsating Am stars. Astronomy & Astrophysics, Volume 535 . Article number A3. doi:10.1051/0004-6361/201117230

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Official URL: http://dx.doi.org/10.1051/0004-6361/201117230

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Abstract

We have studied over 1600 Am stars at a photometric precision of 1 mmag with SuperWASP photometric data. Contrary to previous belief, we find that around 200 Am stars are pulsating δ Sct and γ Dor stars, with low amplitudes that have been missed in previous, less extensive studies. While the amplitudes are generally low, the presence of pulsation in Am stars places a strong constraint on atmospheric convection, and may require the pulsation to be laminar. While some pulsating Am stars have been previously found to be δ Sct stars, the vast majority of Am stars known to pulsate are presented in this paper. They will form the basis of future statistical studies of pulsation in the presence of atomic diffusion.

Item Type: Journal Article
Divisions: Faculty of Science > Physics
Journal or Publication Title: Astronomy & Astrophysics
Publisher: EDP Sciences
ISSN: 0004-6361
Official Date: November 2011
Dates:
DateEvent
November 2011Published
Volume: Volume 535
Article Number: Article number A3
DOI: 10.1051/0004-6361/201117230
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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