Rotational splitting as a function of mode frequency for six Sun-like stars

M. B. Nielsen, L. Gizon, H. Schunker, J. Schou

Research output: Contribution to journalArticle

Abstract

Asteroseismology offers the prospect of constraining differential rotation in Sun-like stars. Here we have identified six high signal-to-noise main-sequence Sun-like stars in the Kepler field, which all have visible signs of rotational splitting of their p-mode frequencies. For each star, we extract the rotational frequency splitting and inclination angle from separate mode sets (adjacent modes with l = 2, 0, and 1) spanning the p-mode envelope. We use a Markov chain Monte Carlo method to obtain the best fit and errors associated with each parameter. We are able to make independent measurements of rotational splittings of ∼8 radial orders for each star. For all six stars, the measured splittings are consistent with uniform rotation, allowing us to exclude large radial differential rotation. This work opens the possibility of constraining internal rotation of Sun-like stars.

Original languageEnglish (US)
Article numberL12
JournalAstronomy and Astrophysics
Volume568
DOIs
StatePublished - 2014

Keywords

  • Asteroseismology
  • Methods: data analysis
  • Stars: rotation
  • Stars: solar-type

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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