Asteroseismology of evolved stars with Kepler

A new way to constrain stellar interiors using mode inertias

Othman Benomar, K. Belkacem, T. R. Bedding, D. Stello, M. P. Di Mauro, R. Ventura, B. Mosser, M. J. Goupil, R. Samadi, R. A. Garcia

    Research output: Contribution to journalArticle

    Abstract

    The asteroseismology of evolved solar-like stars is experiencing growing interest due to the wealth of observational data from space-borne instruments such as the CoRoT and Kepler spacecraft. In particular, the recent detection of mixed modes, which probe both the innermost and uppermost layers of stars, paves the way for inferring the internal structure of stars along their evolution through the subgiant and red giant phases. Mixed modes can also place stringent constraints on the physics of such stars and on their global properties (mass, age, etc.). Here, using two Kepler stars (KIC 4351319 and KIC 6442183), we demonstrate that measurements of mixed mode characteristics allow us to estimate the mode inertias, providing a new and additional diagnostics on the mode trapping and subsequently on the internal structure of evolved stars. We however stress that the accuracy may be sensitive to non-adiabatic effects.

    Original languageEnglish (US)
    Article numberL29 (6pp)
    JournalAstrophysical Journal Letters
    Volume781
    Issue number2
    DOIs
    StatePublished - Feb 1 2014

    Fingerprint

    stellar interiors
    asteroseismology
    inertia
    trapping
    physics
    spacecraft
    probe
    stars
    detection
    effect
    probes
    estimates

    Keywords

    • methods: data analysis
    • stars: interiors
    • stars: oscillations

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Benomar, O., Belkacem, K., Bedding, T. R., Stello, D., Di Mauro, M. P., Ventura, R., ... Garcia, R. A. (2014). Asteroseismology of evolved stars with Kepler: A new way to constrain stellar interiors using mode inertias. Astrophysical Journal Letters, 781(2), [L29 (6pp)]. https://doi.org/10.1088/2041-8205/781/2/L29

    Asteroseismology of evolved stars with Kepler : A new way to constrain stellar interiors using mode inertias. / Benomar, Othman; Belkacem, K.; Bedding, T. R.; Stello, D.; Di Mauro, M. P.; Ventura, R.; Mosser, B.; Goupil, M. J.; Samadi, R.; Garcia, R. A.

    In: Astrophysical Journal Letters, Vol. 781, No. 2, L29 (6pp), 01.02.2014.

    Research output: Contribution to journalArticle

    Benomar, O, Belkacem, K, Bedding, TR, Stello, D, Di Mauro, MP, Ventura, R, Mosser, B, Goupil, MJ, Samadi, R & Garcia, RA 2014, 'Asteroseismology of evolved stars with Kepler: A new way to constrain stellar interiors using mode inertias', Astrophysical Journal Letters, vol. 781, no. 2, L29 (6pp). https://doi.org/10.1088/2041-8205/781/2/L29
    Benomar, Othman ; Belkacem, K. ; Bedding, T. R. ; Stello, D. ; Di Mauro, M. P. ; Ventura, R. ; Mosser, B. ; Goupil, M. J. ; Samadi, R. ; Garcia, R. A. / Asteroseismology of evolved stars with Kepler : A new way to constrain stellar interiors using mode inertias. In: Astrophysical Journal Letters. 2014 ; Vol. 781, No. 2.
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