Journal Article

On the seismic age and heavy-element abundance of the Sun

G. Houdek and D. O. Gough

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 418, issue 2, pages 1217-1230
Published in print December 2011 | ISSN: 0035-8711
Published online November 2011 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2011.19572.x
On the seismic age and heavy-element abundance of the Sun

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We estimate the main-sequence age and heavy-element abundance of the Sun by means of an asteroseismic calibration of theoretical solar models using only low-degree acoustic modes from the BiSON. The method can therefore be applied also to other solar-type stars, such as those observed by the NASA satellite Kepler and the planned ground-based Danish-led Stellar Observations Network Group (SONG). The age, 4.60 ± 0.04 Gyr, obtained with this new seismic method, is similar to, although somewhat greater than, today’s commonly adopted values, and the surface heavy-element abundance by mass, Zs= 0.0142 ± 0.0005, lies between the values quoted recently by Asplund et al. and by Caffau et al. We stress that our best-fitting model is not a seismic model, but a theoretically evolved model of the Sun constructed with ‘standard’ physics and calibrated against helioseismic data.

Keywords: Sun: abundances; Sun: fundamental parameters; Sun: interior; Sun: oscillations; stars: interiors; stars: oscillations

Journal Article.  11745 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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