Bibcode
White, T. R.; Benomar, O.; Silva Aguirre, V.; Ball, W. H.; Bedding, T. R.; Chaplin, W. J.; Christensen-Dalsgaard, J.; Garcia, R. A.; Gizon, L.; Stello, D.; Aigrain, S.; Antia, H. M.; Appourchaux, T.; Bazot, M.; Campante, T. L.; Creevey, O. L.; Davies, G. R.; Elsworth, Y. P.; Gaulme, P.; Handberg, R.; Hekker, S.; Houdek, G.; Howe, R.; Huber, D.; Karoff, C.; Marques, J. P.; Mathur, S.; McQuillan, A.; Metcalfe, T. S.; Mosser, B.; Nielsen, M. B.; Régulo, C.; Salabert, D.; Stahn, T.
Bibliographical reference
Astronomy and Astrophysics, Volume 601, id.A82, 16 pp.
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5
2017
Journal
Citations
31
Refereed citations
27
Description
Binary star systems are important for understanding stellar structure
and evolution, and are especially useful when oscillations can be
detected and analysed with asteroseismology. However, only four systems
are known in which solar-like oscillations are detected in both
components. Here, we analyse the fifth such system, HD 176465, which was
observed by Kepler. We carefully analysed the system's power spectrum to
measure individual mode frequencies, adapting our methods where
necessary to accommodate the fact that both stars oscillate in a similar
frequency range. We also modelled the two stars independently by fitting
stellar models to the frequencies and complementaryparameters. We are
able to cleanly separate the oscillation modes in both systems. The
stellar models produce compatible ages and initial compositions for the
stars, as is expected from their common and contemporaneous origin.
Combining the individual ages, the system is about 3.0 ± 0.5 Gyr
old. The two components of HD 176465 are young physically-similar
oscillating solar analogues, the first such system to be found, and
provide important constraints for stellar evolution and
asteroseismology.
Related projects
Helio and Astero-Seismology and Exoplanets Search
The principal objectives of this project are: 1) to study the structure and dynamics of the solar interior, 2) to extend this study to other stars, 3) to search for extrasolar planets using photometric methods (primarily by transits of their host stars) and their characterization (using radial velocity information) and 4) the study of the planetary
Savita
Mathur