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Standing on the shoulders of Dwarfs: the $Kepler$ asteroseismic LEGACY sample I - oscillation mode parameters

Mikkel N. Lund 1, 2 Victor Silva Aguirre 2 Guy R. Davies 1, 2 William J. Chaplin 1, 2 Jørgen Christensen-Dalsgaard 2 Günter Houdek 2 Timothy R. White 2 Timothy R. Bedding 2, 3 Warrick H. Ball 4, 5 Daniel Huber 2, 3, 6 H. M. Antia 7 Yveline Lebreton 8, 9 David W. Latham 10 Rasmus Handberg 2 Kuldeep Verma 2, 7 Sarbani Basu 11 Luca Casagrande 12 Anders B. Justesen 2 Hans Kjeldsen 2 Jakob R. Mosumgaard 2
1 School of Physics and Astronomy [Birmingham]
2 SAC - Stellar Astrophysics Centre [Aarhus]
3 SIfA - Sydney Institute for Astronomy
4 Institut für Astrophysik [Göttingen]
5 MPS - Max-Planck-Institut für Sonnensystemforschung
6 SETI - Search for Extraterrestrial Intelligence Institute
7 TIFR - Tata Institute for Fundamental Research
8 LESIA (UMR_8109) - Laboratoire d'études spatiales et d'instrumentation en astrophysique
9 IPR - Institut de Physique de Rennes
10 CfA - Harvard-Smithsonian Center for Astrophysics
11 Department of Astronomy [New Haven]
12 RSAA - Research School of Astronomy and Astrophysics [Canberra]
Abstract : The advent of space-based missions like $Kepler$ has revolutionized the study of solar-type stars, particularly through the measurement and modeling of their resonant modes of oscillation. Here we analyze a sample of 66 $Kepler$ main-sequence stars showing solar-like oscillations as part of the $Kepler$ seismic LEGACY project. We use $Kepler$ short-cadence data, of which each star has at least 12 months, to create frequency power spectra optimized for asteroseismology. For each star we identify its modes of oscillation and extract parameters such as frequency, amplitude, and line width using a Bayesian Markov chain Monte Carlo `peak-bagging' approach. We report the extracted mode parameters for all 66 stars, as well as derived quantities such as frequency difference ratios, the large and small separations $\Delta\nu$ and $\delta\nu_{02}$; the behavior of line widths with frequency and line widths at $\nu_{\rm max}$ with $T_{\rm eff}$, for which we derive parametrizations; and behavior of mode visibilities. These average properties can be applied in future peak-bagging exercises to better constrain the parameters of the stellar oscillation spectra. The frequencies and frequency ratios can tightly constrain the fundamental parameters of these solar-type stars, and mode line widths and amplitudes can test models of mode damping and excitation.
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OBSPM | UNIV-RENNES | SORBONNE-UNIVERSITE | SU-SCIENCES | UNIV-PARIS | UP-SCIENCES | USPC | PSL | INSU | UNIV-PARIS7 | UNIV-RENNES1 | CNRS | LESIA | OSUR | IPR | IPR-PMOL | UR1-UFR-SPM | SU-TI

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Mikkel N. Lund, Victor Silva Aguirre, Guy R. Davies, William J. Chaplin, Jørgen Christensen-Dalsgaard, et al.. Standing on the shoulders of Dwarfs: the $Kepler$ asteroseismic LEGACY sample I - oscillation mode parameters. The Astrophysical Journal, American Astronomical Society, 2017, 835 (2), pp.172. ⟨10.3847/1538-4357/835/2/172⟩. ⟨hal-01407387⟩

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