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Abstract: Frequency separations used to infer global properties of stars throughasteroseismology can change depending on the strength and at what epoch of thestellar cycle the p-mode frequencies are measured. In the Sun these variationshave been seen, even though the Sun is a low-activity star. In this paper, wediscuss these variations and their impact on the determination of the stellarparameters radius, mass and age for the Sun. Using the data from maximum andminimum activity, we fitted an age for the Sun that differs on average by 0.2Gyr: slightly older during minimum activity. The fitted radius is also lower byabout 0.5% for the solar effective temperature during minimum.



Author: O. L. Creevey, D. Salabert, R. A. Garcia

Source: https://arxiv.org/







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