SuperWASP observations of pulsating Am stars
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 delta Sct and gamma 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 delta 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.
Cite
@article{arxiv.1107.0246,
title = {SuperWASP observations of pulsating Am stars},
author = {B Smalley and D. W. Kurtz and A. M. S. Smith and L. Fossati and D. R. Anderson and S. C. C. Barros and O. W. Butters and A. Collier Cameron and D. J. Christian and B. Enoch and F. Faedi and C. A. Haswell and C. Hellier and S. Holmes and K. Horne and S. R. Kane and T. A. Lister and P. F. L. Maxted and A. J. Norton and N. Parley and D. Pollacco and E. K. Simpson and I. Skillen and J. Southworth and R. A. Street and R. G. West and P. J. Wheatley and P. L. Wood},
journal= {arXiv preprint arXiv:1107.0246},
year = {2015}
}
Comments
10 pages, 5 figures, 1 table. Accepted for publication in A&A. Owing to large size, multi-page Figure 1 is not included. Full version can be downloaded from http://www.astro.keele.ac.uk/~bs/wasp_Am.pdf