000003393 001__ 3393
000003393 005__ 20180116112236.0
000003393 0247_ $$2DOI$$a10.1093/mnras/stw2903
000003393 037__ $$aSCART-2018-0014
000003393 100__ $$aSmalley, B.
000003393 245__ $$aPulsation versus metallicism in Am stars as revealed by LAMOST and WASP
000003393 260__ $$c2017
000003393 520__ $$aWe present the results of a study of a large sample of A and Am stars with spectral types from Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) and light curves from Wide Area Search for Planets (WASP). We find that, unlike normal A stars, δ Sct pulsations in Am stars are mostly confined to the effective temperature range 6900 < {{T_eff}} < 7600 K. We find evidence that the incidence of pulsations in Am stars decreases with increasing metallicism (degree of chemical peculiarity). The maximum amplitude of the pulsations in Am stars does not appear to vary significantly with metallicism. The amplitude distributions of the principal pulsation frequencies for both A and Am stars appear very similar and agree with results obtained from Kepler photometry. We present evidence that suggests turbulent pressure is the main driving mechanism in pulsating Am stars, rather than the κ-mechanism, which is expected to be suppressed by gravitational settling in these stars. 
000003393 594__ $$aNO
000003393 6531_ $$aasteroseismology
000003393 6531_ $$atechniques: photometric
000003393 6531_ $$astars: chemically peculiar
000003393 6531_ $$astars: oscillations
000003393 6531_ $$astars: variables: δ Scuti
000003393 700__ $$aAntoci, V.
000003393 700__ $$aHoldsworth, D. L.
000003393 700__ $$aKurtz, D. W.
000003393 700__ $$aMurphy, S. J.
000003393 700__ $$aDe Cat, P.
000003393 700__ $$aAnderson, D. R.
000003393 700__ $$aCatanzaro, G.
000003393 700__ $$aCameron, A. Collier
000003393 700__ $$aHellier, C.
000003393 700__ $$aMaxted, P. F. L.
000003393 700__ $$aNorton, A. J.
000003393 700__ $$aPollacco, D.
000003393 700__ $$aRipepi, V.
000003393 700__ $$aWest, R. G.
000003393 700__ $$aWheatley, P. J.
000003393 773__ $$c2662-2670$$n3$$pMonthly Notices of the Royal Astronomical Society$$v465$$y2017
000003393 8560_ $$fpeter@observatoire.be
000003393 8564_ $$s1823182$$uhttp://publi2-as.oma.be/record/3393/files/Smalley2017_MNRAS465_2662.pdf
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000003393 905__ $$apublished in
000003393 980__ $$aREFERD