Kepler observations of the asteroseismic binary HD 176465

T. R. White, Othman Benomar, V. Silva Aguirre, W. H. Ball, T. R. Bedding, W. J. Chaplin, J. Christensen-Dalsgaard, R. A. Garcia, Laurent Gizon, D. Stello, S. Aigrain, H. M. Antia, T. Appourchaux, Michael Bazot, T. L. Campante, O. L. Creevey, G. R. Davies, Y. P. Elsworth, P. Gaulme, R. HandbergS. Hekker, G. Houdek, R. Howe, D. Huber, C. Karoff, J. P. Marques, S. Mathur, A. McQuillan, T. S. Metcalfe, B. Mosser, Martin Bo Nielsen, C. Régulo, D. Salabert, T. Stahn

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Article numberA82
JournalAstronomy and Astrophysics
Volume601
DOIs
StatePublished - May 1 2017

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asteroseismology
stellar models
stellar evolution
oscillation
stars
stellar structure
solar oscillations
oscillations
binary stars
power spectra
frequency ranges
analogs
method
young

Keywords

  • Asteroseismology
  • Methods: Data analysis
  • Stars: Individual: HD 176465

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

White, T. R., Benomar, O., Silva Aguirre, V., Ball, W. H., Bedding, T. R., Chaplin, W. J., ... Stahn, T. (2017). Kepler observations of the asteroseismic binary HD 176465. Astronomy and Astrophysics, 601, [A82]. https://doi.org/10.1051/0004-6361/201628706

Kepler observations of the asteroseismic binary HD 176465. / White, T. R.; Benomar, Othman; Silva Aguirre, V.; Ball, W. H.; Bedding, T. R.; Chaplin, W. J.; Christensen-Dalsgaard, J.; Garcia, R. A.; Gizon, Laurent; Stello, D.; Aigrain, S.; Antia, H. M.; Appourchaux, T.; Bazot, Michael; 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, Martin Bo; Régulo, C.; Salabert, D.; Stahn, T.

In: Astronomy and Astrophysics, Vol. 601, A82, 01.05.2017.

Research output: Contribution to journalArticle

White, TR, Benomar, O, Silva Aguirre, V, Ball, WH, Bedding, TR, Chaplin, WJ, Christensen-Dalsgaard, J, Garcia, RA, Gizon, L, Stello, D, Aigrain, S, Antia, HM, Appourchaux, T, Bazot, M, Campante, TL, Creevey, OL, Davies, GR, Elsworth, YP, Gaulme, P, Handberg, R, Hekker, S, Houdek, G, Howe, R, Huber, D, Karoff, C, Marques, JP, Mathur, S, McQuillan, A, Metcalfe, TS, Mosser, B, Nielsen, MB, Régulo, C, Salabert, D & Stahn, T 2017, 'Kepler observations of the asteroseismic binary HD 176465', Astronomy and Astrophysics, vol. 601, A82. https://doi.org/10.1051/0004-6361/201628706
White TR, Benomar O, Silva Aguirre V, Ball WH, Bedding TR, Chaplin WJ et al. Kepler observations of the asteroseismic binary HD 176465. Astronomy and Astrophysics. 2017 May 1;601. A82. https://doi.org/10.1051/0004-6361/201628706
White, T. R. ; Benomar, Othman ; Silva Aguirre, V. ; Ball, W. H. ; Bedding, T. R. ; Chaplin, W. J. ; Christensen-Dalsgaard, J. ; Garcia, R. A. ; Gizon, Laurent ; Stello, D. ; Aigrain, S. ; Antia, H. M. ; Appourchaux, T. ; Bazot, Michael ; 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, Martin Bo ; Régulo, C. ; Salabert, D. ; Stahn, T. / Kepler observations of the asteroseismic binary HD 176465. In: Astronomy and Astrophysics. 2017 ; Vol. 601.
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AU - White, T. R.

AU - Benomar, Othman

AU - Silva Aguirre, V.

AU - Ball, W. H.

AU - Bedding, T. R.

AU - Chaplin, W. J.

AU - Christensen-Dalsgaard, J.

AU - Garcia, R. A.

AU - Gizon, Laurent

AU - Stello, D.

AU - Aigrain, S.

AU - Antia, H. M.

AU - Appourchaux, T.

AU - Bazot, Michael

AU - Campante, T. L.

AU - Creevey, O. L.

AU - Davies, G. R.

AU - Elsworth, Y. P.

AU - Gaulme, P.

AU - Handberg, R.

AU - Hekker, S.

AU - Houdek, G.

AU - Howe, R.

AU - Huber, D.

AU - Karoff, C.

AU - Marques, J. P.

AU - Mathur, S.

AU - McQuillan, A.

AU - Metcalfe, T. S.

AU - Mosser, B.

AU - Nielsen, Martin Bo

AU - Régulo, C.

AU - Salabert, D.

AU - Stahn, T.

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N2 - 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.

AB - 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.

KW - Asteroseismology

KW - Methods: Data analysis

KW - Stars: Individual: HD 176465

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