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. Handberg & 14 others S. 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

    Fingerprint

    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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    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.",
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    T1 - Kepler observations of the asteroseismic binary HD 176465

    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.

    PY - 2017/5/1

    Y1 - 2017/5/1

    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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