Establishing the accuracy of asteroseismic mass and radius estimates of giant stars. I. Three eclipsing systems at [Fe/H]~ -0.3 and the need for a large high-precision sample
| العنوان: | Establishing the accuracy of asteroseismic mass and radius estimates of giant stars. I. Three eclipsing systems at [Fe/H]~ -0.3 and the need for a large high-precision sample |
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| المؤلفون: | Jens Jessen-Hansen, D. Slumstrup, Andrea Miglio, H. Bruntt, Mikkel N. Lund, Rasmus Handberg, A. O. Thygesen, William J. Chaplin, Frank Grundahl, Torben Arentoft, Diego Bossini, Guy R. Davies, K. Brogaard, S. Frandsen, Camilla Juul Hansen |
| المصدر: | Brogaard, K, Hansen, C J, Miglio, A, Slumstrup, D, Frandsen, S, Jessen-Hansen, J, Lund, M N, Bossini, D, Thygesen, A, Davies, G R, Chaplin, W J, Arentoft, T, Bruntt, H, Grundahl, F & Handberg, R 2018, ' Establishing the accuracy of asteroseismic mass and radius estimates of giant stars-I. Three eclipsing systems at [Fe/H] similar to-0.3 and the need for a large high-precision sample ', Royal Astronomical Society. Monthly Notices, vol. 476, no. 3, pp. 3729-3743 . https://doi.org/10.1093/mnras/sty268 Monthly Notices of the Royal Astronomical Society |
| بيانات النشر: | arXiv, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Red giant, KEPLER, FOS: Physical sciences, Astrophysics, stellar content, 01 natural sciences, Asteroseismology, PARAMETERS, eclipsing-stars, BINARIES, MC 7037405, KIC 9540226, KIC 9970396-Galaxy, 0103 physical sciences, Binary star, SPECTRA, Astrophysics::Solar and Stellar Astrophysics, Solar-like oscillations, individual, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), MISSION, Physics, LIGHT CURVES, 010308 nuclear & particles physics, evolution-stars, fundamental parameters-stars, Astronomy and Astrophysics, Light curve, Giant star, CATALOG, AGES, Stars, Astrophysics - Solar and Stellar Astrophysics, 13. Climate action, Space and Planetary Science, OPEN CLUSTERS, Astrophysics::Earth and Planetary Astrophysics, SOLAR-LIKE OSCILLATIONS, Open cluster |
| الوصف: | We aim to establish and improve the accuracy level of asteroseismic estimates of mass, radius, and age of giant stars. This can be achieved by measuring independent, accurate, and precise masses, radii, effective temperatures and metallicities of long period eclipsing binary stars with a red giant component that displays solar-like oscillations. We measured precise properties of the three eclipsing binary systems KIC 7037405, KIC 9540226, and KIC 9970396 and estimated their ages be $5.3\pm0.5$, $3.1\pm0.6$, and $4.8\pm0.5$ Gyr. The measurements of the giant stars were compared to corresponding measurements of mass, radius, and age using asteroseismic scaling relations and grid modeling. We found that asteroseismic scaling relations without corrections to $\Delta\nu$ systematically overestimate the masses of the three red giants by 11.7%, 13.7%, and 18.9%, respectively. However, by applying theoretical correction factors $f_{\Delta\nu}$ according to Rodrigues et al. (2017), we reached general agreement between dynamical and asteroseismic mass estimates, and no indications of systematic differences at the precision level of the asteroseismic measurements. The larger sample investigated by Gaulme et al. (2016) showed a much more complicated situation, where some stars show agreement between the dynamical and corrected asteroseismic measures while others suggest significant overestimates of the asteroseismic measures. We found no simple explanation for this, but indications of several potential problems, some theoretical, others observational. Therefore, an extension of the present precision study to a larger sample of eclipsing systems is crucial for establishing and improving the accuracy of asteroseismology of giant stars. Comment: Accepted for publication in MNRAS, 17 pages |
| وصف الملف: | application/pdf |
| DOI: | 10.48550/arxiv.1801.08167 |
| DOI: | 10.1093/mnras/sty268 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02769338815ded942ba8326763b9fd9c |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....02769338815ded942ba8326763b9fd9c |
| قاعدة البيانات: | OpenAIRE |
| DOI: | 10.48550/arxiv.1801.08167 |
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