Standing on the Shoulders of Dwarfs: the Kepler Asteroseismic LEGACY Sample. I. Oscillation Mode Parameters

Research output: Contribution to journalArticlepeer-review

Authors

  • V. Silva Aguirre
  • J. Christensen-Dalsgaard
  • G. Houdek
  • T. R. White
  • T. R. Bedding
  • D. Huber
  • H. M. Antia
  • Y. Lebreton
  • D. W. Latham
  • K. Verma
  • S. Basu
  • L. Casagrande
  • A. B. Justesen
  • H. Kjeldsen
  • J. R. Mosumgaard

Colleges, School and Institutes

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 ${\rm{\Delta }}\nu $ and $\delta {\nu }_{02};$ the behavior of line widths with frequency and line widths at ${\nu }_{\max }$ with ${T}_{\mathrm{eff}}$, 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.

Details

Original languageEnglish
Pages (from-to)172
Number of pages1
JournalThe Astrophysical Journal
Volume835
Early online date30 Jan 2017
Publication statusPublished - 1 Feb 2017

Keywords

  • stars: fundamental parameters, asteroseismology, stars: evolution, stars: oscillations