Evidence of angular momentum transport in main-sequence solar-like stars

Othman Benomar, Masao Takata, Hiromoto Shibahashi, Tugdual Ceillier, Rafael A. García

Research output: Contribution to journalArticle

Abstract

The rotation rates in the interior and at the surface is determined for the 22 main-sequence stars with masses between 1.0 and 1.6 M⊙. The average interior rotation is measured using asteroseismology, while the surface rotation is measured by the spectroscopic v sin i or the periodic light variation due to surface structures, such as spots. It is found that the difference between the surface rotation rate determined by spectroscopy and the average rotation rate for most of stars is small enough to suggest that an efficient process of angular momentum transport operates during and/or before the main-sequence stage of stars. By comparing the surface rotation rate measured from the light variation with those measured by spectroscopy, we found hints of latitudinal differential rotation. However, this must be confirmed by a further study because our result is sensitive to a few data points.

Original languageEnglish (US)
Pages (from-to)661-666
Number of pages6
JournalProceedings of the International Astronomical Union
Volume11
Issue numberA29B
DOIs
StatePublished - 2015

Keywords

  • methods: data analysis
  • stars: interiors
  • stars: low-mass
  • stars: oscillations
  • stars: rotation

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

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