Constraining differential rotation of Sun-like stars from asteroseismic and starspot rotation periods

M. B. Nielsen, H. Schunker, L. Gizon, W. H. Ball

Research output: Contribution to journalArticle

Abstract

In previous work, we identified six Sun-like stars observed by Kepler with exceptionally clear asteroseismic signatures of rotation. Here, we show that five of these stars exhibit surface variability suitable for measuring rotation. We compare the rotation periods obtained from light-curve variability with those from asteroseismology in order to further constrain differential rotation. The two rotation measurement methods are found to agree within uncertainties, suggesting that radial differential rotation is weak, as is the case for the Sun. Furthermore, we find significant discrepancies between ages from asteroseismology and from three different gyrochronology relations, implying that stellar age estimation is problematic even for Sun-like stars.

Original languageEnglish (US)
Article numberA10
JournalAstronomy and Astrophysics
Volume582
DOIs
StatePublished - Oct 1 2015

Keywords

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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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