Balona, L. A × Ripepi, V Catanzaro, G Kurtz, D. W Smalley, B De Cat, P Eyer, L Grigahcene, A Leccia, S Southworth, J Uytterhoeven, K Van Winckel, Hans Christensen-Dalsgaard, J Kjeldsen, H Caldwell, D. A Van Cleve, J Girouard, F. R #
Priestley and Weale
Monthly Notices of the Royal Astronomical Society vol:414 issue:1 pages:792-800
We present an analysis of high-resolution spectra for two pulsating Am stars in the Kepler field. The stellar parameters derived in this way are important because parameters derived from narrow-band photometry may be affected by the strong metal lines in these stars. We analyse the Kepler time series of ten known Am stars and find that six of them clearly show delta Scuti pulsations. The other four appear to be non-pulsating. We derive fundamental parameters for all known pulsating Am stars from ground-based observations and also for the Kepler Am stars to investigate the location of the instability strip for pulsating Am stars. We find that there is not much difference between the Am-star instability strip and the delta Scuti instability strip. We find that the observed location of pulsating Am stars in the HR diagram does not agree with the location predicted from diffusion calculations.