Discovery of Tidally Perturbed Pulsations in the Eclipsing Binary U Gru: A Crucial System for Tidal Asteroseismology
| Autor: | Dominic M. Bowman, K. Gunsriwiwat, Andrew Tkachenko, Conny Aerts, David Mkrtichian, Cole Johnston |
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| Rok vydání: | 2019 |
| Předmět: |
oscillations [stars]
Astronomy FOS: Physical sciences Binary number asteroseismology Astrophysics::Cosmology and Extragalactic Astrophysics Astronomy & Astrophysics 01 natural sciences Asteroseismology massive [stars] 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics Physics Science & Technology 010308 nuclear & particles physics ORBIT CLOSE BINARIES COMPONENTS Astronomy and Astrophysics PERTURBATIONS individual (U Gru) [stars] Astrophysics - Solar and Stellar Astrophysics 13. Climate action Space and Planetary Science evolution [stars] Physical Sciences rotation [stars] ISENTROPIC OSCILLATIONS Astrophysics::Earth and Planetary Astrophysics STARS DYNAMIC TIDES |
| Zdroj: | Astrophysical Journal Letters, 883, 1-9 Astrophysical Journal Letters, 883, 1, pp. 1-9 The Astrophysical Journal |
| ISSN: | 2041-8213 0004-637X 1538-3881 0067-0049 0004-6361 2041-8205 |
| DOI: | 10.3847/2041-8213/ab3fb2 |
| Popis: | The interior physics of stars is currently not well constrained for early-type stars. This is particularly pertinent for multiple systems as binary interaction becomes more prevalent for more massive stars, which strongly affects their evolution. High-precision photometry from the Transiting Exoplanet Survey Satellite (TESS) mission offers the opportunity to remedy the dearth of observations of pulsating stars that show evidence of binary interaction, specifically pulsating mass-accreting components of semi-detached Algol-type eclipsing binary (oEA) systems. We present the TESS light curve of the circular eclipsing binary system U Gru (TIC 147201138), which shows evidence for free heat-driven pressure modes and a series of tidally-perturbed pressure modes. We highlight the asteroseismic potential of studying pulsating stars in binary systems, and demonstrate how tidal asteroseismology can be applied to infer the influence of binary interaction on stellar structure. Comment: 9 pages, 4 figures, accepted (in press) for publication in ApJ Letters |
| Databáze: | OpenAIRE |
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