期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 742, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/742/1/L3
关键词
stars: oscillations
资金
- NASA's Science Mission Directorate
- Australian Postgraduate Award
- University of Sydney
- Australian Astronomical Observatory PhD Scholarship
- Denison Merit Award
- Australian Research Council
- Netherlands Organisation for Scientific Research
- Spanish National Research Plan [AYA2010-17803]
- National Science Foundation
- STFC [ST/F002041/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F002041/1] Funding Source: researchfish
Photometric observations made by the NASA Kepler Mission have led to a dramatic increase in the number of main-sequence and subgiant stars with detected solar-like oscillations. We present an ensemble asteroseismic analysis of 76 solar-type stars. Using frequencies determined from the Kepler time-series photometry, we have measured three asteroseismic parameters that characterize the oscillations: the large frequency separation (Delta nu), the small frequency separation between modes of l = 0 and l = 2 (delta nu(02)), and the dimensionless offset (epsilon). These measurements allow us to construct asteroseismic diagrams, namely the so-called Christensen-Dalsgaard diagram of delta nu(02) versus Delta nu, and the recently re-introduced epsilon diagram. We compare the Kepler results with previously observed solar-type stars and with theoretical models. The positions of stars in these diagrams places constraints on their masses and ages. Additionally, we confirm the observational relationship between epsilon and T-eff that allows for the unambiguous determination of radial order and should help resolve the problem of mode identification in F stars.
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