000002241 001__ 2241
000002241 005__ 20160701171701.0
000002241 0247_ $$2DOI$$a10.1038/nature10389
000002241 037__ $$aASTROimport-398
000002241 100__ $$aAntoci, V.
000002241 245__ $$aThe excitation of solar-like oscillations in a dSct star by efficient envelope convection
000002241 260__ $$c2011
000002241 520__ $$aDelta Scuti (dSct) stars are opacity-driven pulsators with masses of 1.5-2.5Msolar, their pulsations resulting from the varying ionization of helium. In less massive stars such as the Sun, convection transports mass and energy through the outer 30per cent of the star and excites a rich spectrum of resonant acoustic modes. Based on the solar example, with no firm theoretical basis, models predict that the convective envelope in dSct stars extends only about 1per cent of the radius, but with sufficient energy to excite solar-like oscillations. This was not observed before the Kepler mission, so the presence of a convective envelope in the models has been questioned. Here we report the detection of solar-like oscillations in the dSct star HD187547, implying that surface convection operates efficiently in stars about twice as massive as the Sun, as the ad hoc models predicted. 
000002241 700__ $$a Handler, G.
000002241 700__ $$a Campante, T. L.
000002241 700__ $$a Thygesen, A. O.
000002241 700__ $$a Moya, A.
000002241 700__ $$a Kallinger, T.
000002241 700__ $$a Stello, D.
000002241 700__ $$a Grigahcène, A.
000002241 700__ $$a Kjeldsen, H.
000002241 700__ $$a Bedding, T. R.
000002241 700__ $$a Lüftinger, T.
000002241 700__ $$a Christensen-Dalsgaard, J.
000002241 700__ $$a Catanzaro, G.
000002241 700__ $$a Frasca, A.
000002241 700__ $$a De Cat, P.
000002241 700__ $$a Uytterhoeven, K.
000002241 700__ $$a Bruntt, H.
000002241 700__ $$a Houdek, G.
000002241 700__ $$a Kurtz, D. W.
000002241 700__ $$a Lenz, P.
000002241 700__ $$a Kaiser, A.
000002241 700__ $$a van Cleve, J.
000002241 700__ $$a Allen, C.
000002241 700__ $$a Clarke, B. D.
000002241 773__ $$c570-573$$i7366$$pNature$$v477$$y2011
000002241 85642 $$ahttp://esoads.eso.org/abs/2011Natur.477..570A
000002241 905__ $$apublished in
000002241 980__ $$aREFERD