| Title | Seismic diagnostics of solar-like oscillating stars |
| Authors | Li, Ya-Guang Du, Ming-Hao Xie, Bo-Han Tian, Zhi-Jia Bi, Shao-Lan Li, Tan-Da Wu, Ya-Qian Liu, Kang |
| Affiliation | Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China. Peking Univ, Dept Astron, Beijing 100871, Peoples R China. Univ Sydney, SIfA, Sch Phys, Sydney, NSW 2006, Australia. Aarhus Univ, Stellar Astrophys Ctr, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark. |
| Keywords | stars: evolution stars: oscillations stars: fundamental parameters MAIN-SEQUENCE STARS RED-GIANT STARS ASTEROSEISMIC ANALYSIS STELLAR EVOLUTION ELEMENT DIFFUSION KEPLER TARGETS MIXED-MODES PARAMETERS METALLICITY TEMPERATURE |
| Issue Date | 2017 |
| Publisher | RESEARCH IN ASTRONOMY AND ASTROPHYSICS |
| Citation | RESEARCH IN ASTRONOMY AND ASTROPHYSICS.2017,17(5). |
| Abstract | High precision and long-lasting Kepler data enabled us to estimate stellar properties with asteroseismology as an accurate tool. We performed asteroseismic analysis on six solar-like stars observed by the Kepler mission: KIC 6064910, KIC 6766513, KIC 7107778, KIC 10079226, KIC 10147635 and KIC 12069127. The extraction of seismic information includes two parts. First, we obtained two global asteroseismic parameters, mean large separation Delta v. and frequency of maximum power Delta(max), with autocorrelation function and collapsed autocorrelation function. Second, we extracted individual oscillation modes v(nl) with low-l degree using a least-squares fit. Stellar grid models were built with Yale Rotating Stellar Evolution Code (YREC) to analyze stellar properties. They covered the range of M = 0.8 similar to 1.8 M. with a step of 0.02M. and [Fe/H] = -0.3 similar to 0.4 dex with a step of 0.1 dex. We used a Bayesian approach to estimate stellar fundamental parameters of the six stars, under the constraints of asteroseismic parameters (Delta v,v(max)) and non-asteroseismic parameters (T-eff, [Fe/H]). We discover that the six targets include five sub-giant stars with 1.2 similar to 1.5 M-circle dot and one main-sequence star with 1.08 M., and with ages in the range of 3 similar to 5 Gyr. |
| URI | http://hdl.handle.net/20.500.11897/473557 |
| ISSN | 1674-4527 |
| DOI | 10.1088/1674-4527/17/5/44 |
| Indexed | SCI(E) |
| Appears in Collections: | 物理学院 |
