Diverse 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
| Autor: | Roland Vanderspek, Peter De Cat, Alexandre David-Uraz, Jadwiga Daszyńska-Daszkiewicz, Dominic M. Bowman, Matteo Cantiello, Derek Buzasi, George R. Ricker, Coralie Neiner, Catherine Lovekin, Conny Aerts, Andrew Tkachenko, M. G. Pedersen, Andrzej Pigulski, James Sikora, S. Chowdhury, Gerald Handler, Sergio Simón-Díaz, G. M. Mirouh, Cole Johnston, Ehsan Moravveji |
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| Přispěvatelé: | Instituut voor Sterrenkunde [Leuven], Catholic University of Leuven - Katholieke Universiteit Leuven (KU Leuven), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Center for Space Research [Cambridge] (CSR), Massachusetts Institute of Technology (MIT), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Angular momentum
010504 meteorology & atmospheric sciences Astronomy FOS: Physical sciences Astrophysics asteroseismology Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Asteroseismology stars: rotation 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Stellar structure stars: evolution 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences Physics Astronomy and Astrophysics Light curve [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] Exoplanet stars: massive Stars Astrophysics - Solar and Stellar Astrophysics binaries: general 13. Climate action Space and Planetary Science Satellite stars: oscillations Astrophysics::Earth and Planetary Astrophysics Free parameter |
| Zdroj: | The Astrophysical journal letters The Astrophysical journal letters, Bristol : IOP Publishing, 2019, 872 (1), pp.L9. ⟨10.3847/2041-8213/ab01e1⟩ The Astrophysical Journal, 872, 1, pp. 1-16 The Astrophysical Journal, 872, 1-16 The Astrophysical Journal |
| ISSN: | 2041-8205 2041-8213 0004-637X 0067-0049 1538-3881 0035-8711 |
| DOI: | 10.3847/2041-8213/ab01e1⟩ |
| Popis: | Uncertainties 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. 16 pages, 4 figures, 1 Table, Accepted for publication in ApJL |
| Databáze: | OpenAIRE |
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