Asteroseismic detection of latitudinal differential rotation in 13 Sun-like stars

2018/09/20 by O. Benomar, M. Bazot, M. B. Nielsen +7 · 2 citations
Physics and Astronomy · Social Sciences · #Asteroseismology #Convection #Differential (mechanical device) #Differential rotation #Educational Leadership and Practices #Rotation (mathematics) #Solar and Space Plasma Dynamics #Solar rotation #Stars #Stellar, planetary, and galactic studies #astro-ph.SR

paper · pdf · doi:10.1126/science.aao6571

published as Science, Vol. 361, Issue 6408, pp. 1231-1234, 21 Sep 2018 · 45 pages, 11 figures, 4 tables, published in Science

openalex publication_date 2018/09/20 · arxiv created 2018/09/21 · arxiv updated 2018/09/24 · openalex created_date 2018/09/27 · openalex updated_date 2026/08/05

Abstract

Stellar oscillations show differential rotation The Sun rotates faster at its equator than at its poles. This process is known as differential rotation and is seen in the motion of sunspots. Helioseismology has shown that the effect extends into the Sun's interior. It has not been possible to measure whether other stars also experience equivalent differential rotation. Benomar et al. used the Kepler spacecraft to monitor stellar oscillations of a group of Sun-like stars. By decomposing the oscillations into separate frequencies, they searched for signs of differential rotation. Several stars do indeed seem to have equators that spin faster than their poles, and none indicated the opposite pattern. Science , this issue p. 1231

Citations

• Solar Differential Rotation and Meridional Flow: The Role of a Subadiabatic Tachocline for the Taylor‐Proudman Balance
• The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog
• Hydromagnetic Dynamo Models.
• The dependence of differential rotation on temperature and rotation
• The acoustic low-degree modes of the Sun measured with 14 years of continuous GOLF & VIRGO measurements
• Equation of State Calculations by Fast Computing Machines
• The Internal Rotation of the Sun
• Monte Carlo sampling methods using Markov chains and their applications

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