Gravity wave-driven flows in the solar tachocline. II. Stationary flows

Eun Jin Kim, K. B. Macgregor

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The effects of gravity waves on the mean radial differential rotation profile in the solar tachocline are studied, including the effect of a uniform, toroidal magnetic field. Vertical transport of horizontal momentum arises from the radiative damping of inwardly traveling waves that are generated by low-frequency, convective fluid motions. By considering two-wave and one-wave interactions, the radiatively damped gravity waves are shown to accentuate the shear in the mean radial differential rotation. In the presence of a strong horizontal magnetic field, internal gravity waves become nearly Alfvénic and cannot propagate downward through the tachocline. For a magnetic field that is weak enough to permit wave propagation, the mean shear profile is shown to be smoother than that obtained in the case of purely hydrodynamic waves. The implications of our results for gravity-wave forcing of the internal solar rotation are discussed.

Original languageEnglish
Pages (from-to)645-654
Number of pages10
JournalAstrophysical Journal
Volume588
Issue number1
DOIs
Publication statusPublished - 1 May 2003
Externally publishedYes

Fingerprint

gravity waves
gravity wave
magnetic field
magnetic fields
shear
solar rotation
wave interaction
internal wave
profiles
traveling waves
wave propagation
damping
momentum
hydrodynamics
low frequencies
fluid
fluids
effect

Bibliographical note

Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders.

Keywords

  • Hydrodynamics
  • MHD
  • Sun: interior
  • Sun: magnetic fields
  • Sun: rotation
  • Waves

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Gravity wave-driven flows in the solar tachocline. II. Stationary flows. / Kim, Eun Jin; Macgregor, K. B.

In: Astrophysical Journal, Vol. 588, No. 1 , 01.05.2003, p. 645-654.

Research output: Contribution to journalArticle

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