000004081 001__ 4081
000004081 005__ 20200131164046.0
000004081 0247_ $$2DOI$$a10.3847/2041-8213/ab01e1
000004081 037__ $$aSCART-2019-0124
000004081 037__ $$aSCART-2019-0089
000004081 100__ $$aPedersen, M.G.
000004081 245__ $$aDiverse Variability of O and B Stars Revealed from 2-minute Cadence Light Curves in Sectors 1 and 2 of the TESS Mission: Selection of an Asteroseismic Sample
000004081 260__ $$c2019
000004081 520__ $$aUncertainties in stellar structure and evolution theory are largest for stars undergoing core convection on the main sequence. A powerful way to calibrate the free parameters used in the theory of stellar interiors is asteroseismology, which provides direct measurements of angular momentum and element transport. We report the detection and classification of new variable O and B stars using high-precision short-cadence (2-min) photometric observations assembled by the Transiting Exoplanet Survey Satellite (TESS). In our sample of 154 O and B stars, we detect a high percentage (90%) of variability. Among these we find 23 multiperiodic pulsators, 6 eclipsing binaries, 21 rotational variables, and 25 stars with stochastic low-frequency variability. Several additional variables overlap between these categories. Our study of O and B stars not only demonstrates the high data quality achieved by TESS for optimal studies of the variability of the most massive stars in the Universe, but also represents the first step towards the selection and composition of a large sample of O and B pulsators with high potential for joint asteroseismic and spectroscopic modeling of their interior structure with unprecedented precision.
000004081 594__ $$aNO
000004081 6531_ $$aasteroseismology
000004081 6531_ $$astars: massive
000004081 6531_ $$astars: evolution
000004081 6531_ $$astars: oscillations
000004081 6531_ $$astars: rotation
000004081 6531_ $$abinaries: general
000004081 700__ $$aChowdhury, S.
000004081 700__ $$aJohnston, C.
000004081 700__ $$aBowman, D.M.
000004081 700__ $$aAerts, C.
000004081 700__ $$aHandler, G.
000004081 700__ $$aDe Cat, P.
000004081 700__ $$aNeiner, C.
000004081 700__ $$aDavid-Uraz, A.
000004081 700__ $$aBuzasi, D.
000004081 700__ $$aTkachenko, A.
000004081 700__ $$aSímon-Díaz, S.
000004081 700__ $$aMoravveji, E.
000004081 700__ $$aSikora, J.
000004081 700__ $$aMirouh, J.M.
000004081 700__ $$aLovekin, C.C.
000004081 700__ $$aCantiello, M.
000004081 700__ $$aDaszyńska-Daszkiewicz, J.
000004081 700__ $$aPigulski, A.
000004081 700__ $$aVanderspek, R.K.
000004081 700__ $$aRicker, G.R.
000004081 773__ $$cL9$$pAstrophysical Journal Letters$$v872
000004081 8560_ $$fpeter.decat@observatoire.be
000004081 905__ $$apublished in
000004081 980__ $$aREFERD