000004536 001__ 4536
000004536 005__ 20200114120022.0
000004536 0247_ $$2DOI$$a10.1093/mnras/stz2787
000004536 037__ $$aSCART-2020-0010
000004536 100__ $$aAntoci, V.
000004536 245__ $$aThe first view of Delta Scuti and Gamma Doradus stars with the TESS mission
000004536 260__ $$c2019
000004536 520__ $$aWe present the first asteroseismic results for Delta Scuti and Gamma Doradus stars observed in Sectors 1 and 2 of the TESS mission. We utilize the 2-min cadence TESS data for a sample of 117 stars to classify their behaviour regarding variability and place them in the Hertzsprung-Russell diagram using Gaia DR2 data. Included within our sample are the eponymous members of two pulsator classes, Gamma Doradus and SX Phoenicis. Our sample of pulsating intermediate-mass stars observed by TESS also allows us to confront theoretical models of pulsation driving in the classical instability strip for the first time and show that mixing processes in the outer envelope play an important role. We derive an empirical estimate of 74 per cent for the relative amplitude suppression factor as a result of the redder TESS passband compared to the Kepler mission using a pulsating eclipsing binary system. Furthermore, our sample contains many high-frequency pulsators, allowing us to probe the frequency variability of hot young Delta Scuti stars, which were lacking in the Kepler mission data set, and identify promising targets for future asteroseismic modelling. The TESS data also allow us to refine the stellar parameters of SX Phoenicis, which is believed to be a blue straggler.
000004536 594__ $$aNO
000004536 6531_ $$aasteroseismology; techniques: photometric; stars: chemically peculiar; stars: interiors; stars: variables: δ Scuti; Astrophysics - Solar and Stellar Astrophysics 
000004536 700__ $$aCunha, M. S.
000004536 700__ $$aBowman, D. M. 
000004536 700__ $$aand 63, more
000004536 700__ $$a(incl. De Cat, P.
000004536 700__ $$aand Lampens, P.)
000004536 773__ $$c4040-4059$$pMonthly Notices of the Royal Astronomical Society$$v490$$y2019
000004536 8560_ $$fpatricia.lampens@observatoire.be
000004536 905__ $$apublished in
000004536 980__ $$aREFERD