Seismic performance
| Autor: | R. Samadi, Andrea Miglio, B. Mosser, Guy R. Davies, M. J. Goupil, L. Girardi, E. Michel |
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| Přispěvatelé: | Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, 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), Institut d'Astrophysique et de Géophysique [Liège], Université de Liège, INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
oscillations [Stars]
FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics stars: interiors 01 natural sciences Asteroseismology Apparent magnitude 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics stars: evolution 010303 astronomy & astrophysics Scaling Stellar evolution Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics Physics interiors [stars] 010308 nuclear & particles physics Astronomy and Astrophysics Stars Astrophysics - Solar and Stellar Astrophysics 13. Climate action Space and Planetary Science Stellar physics evolution [stars] Content (measure theory) stars: oscillations Astrophysics::Earth and Planetary Astrophysics [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Main sequence |
| Zdroj: | Mosser, B, Michel, E, Samadi, R, Miglio, A, Davies, G R, Girardi, L & Goupil, M J 2019, ' Seismic performance ', Astronomy and Astrophysics, vol. 622, A76 . https://doi.org/10.1051/0004-6361/201834607 Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, EDP Sciences, 2019, 622, pp.A76. ⟨10.1051/0004-6361/201834607⟩ Astronomy & Astrophysics |
| ISSN: | 0004-6361 |
| DOI: | 10.1051/0004-6361/201834607 |
| Popis: | Asteroseismology is a unique tool that can be used to study the interior of stars and hence deliver unique information for the studiy of stellar physics, stellar evolution, and Galactic archaeology. We aim to develop a simple model of the information content of asteroseismology and to characterize the ability and precision with which fundamental properties of stars can be estimated for different space missions. We defined and calibrated metrics of the seismic performance. The metrics, expressed by a seismic index ${\mathcal{E}$ defined by simple scaling relations, are calculated for an ensemble of stars. We studied the relations between the properties of mission observations, fundamental stellar properties, and the performance index. We also defined thresholds for asteroseismic detection and measurement of different stellar properties We find two regimes of asteroseismic performance: the first where the signal strength is dominated by stellar properties and not by observational noise; and the second where observational properties dominate. Typically, for evolved stars, stellar properties provide the dominant terms in estimating the information content, while main sequence stars fall in the regime where the observational properties, especially stellar magnitude, dominate. We estimate scaling relations to predict ${\mathcal{E}$ with an intrinsic scatter of around 21%. Incidentally, the metrics allow us to distinguish stars burning either hydrogen or helium. Our predictions will help identify the nature of the cohort of existing and future asteroseismic observations. In addition, the predicted performance for PLATO will help define optimal observing strategies for defined scientific goals. Accepted in A&A |
| Databáze: | OpenAIRE |
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