Properties of oscillation modes in subgiant stars observed by kepler

O. Benomar, T. R. Bedding, B. Mosser, D. Stello, K. Belkacem, R. A. Garcia, T. R. White, C. A. Kuehn, S. Deheuvels, J. Christensen-Dalsgaard

Research output: Contribution to journalArticle

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 subgiant stars, we present the first measure of the effect of the degree of mixture on the ℓ = 1 mixed mode 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.

Original languageEnglish (US)
Article number158
JournalAstrophysical Journal
Volume767
Issue number2
DOIs
StatePublished - Apr 20 2013

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Keywords

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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Benomar, O., Bedding, T. R., Mosser, B., Stello, D., Belkacem, K., Garcia, R. A., White, T. R., Kuehn, C. A., Deheuvels, S., & Christensen-Dalsgaard, J. (2013). Properties of oscillation modes in subgiant stars observed by kepler. Astrophysical Journal, 767(2), [158]. https://doi.org/10.1088/0004-637X/767/2/158