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American Astronomical Society, Astrophysical Journal, 2(767), p. 158, 2013

DOI: 10.1088/0004-637x/767/2/158

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Properties of Oscillation Modes in Subgiant Stars Observed Bykepler

Journal article published in 2013 by O. Benomar, T. R. Bedding ORCID, B. Mosser, D. Stello, K. Belkacem, R. A. Garcia, T. R. White, C. A. Kuehn, S. Deheuvels, J. Christensen-Dalsgaard
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Mixed modes seen in evolved stars carry information on their deeper layers that can place stringent constraints on their physics and on their global properties (mass, age, etc.). In this study, we present a method to identify and measure all oscillatory mode characteristics (frequency, height, width). Analyzing four subgiants stars, we present the first measure of the effect of the degree of mixture on the l=1 mixed modes characteristics. We also show that some stars have measurable l=2 mixed modes and discuss the interest of their measure to constrain the deeper layers of stars. ; Comment: Accepted to ApJ