Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-11-22
Astronomy and Astrophysics
Astrophysics
9 pages latex file using l-aa.sty, 2 postscript figures, accepted by A&A
Scientific paper
The internal gravity waves of low frequency which are emitted at the base of the solar convection zone are able to extract angular momentum from the radiative interior. We evaluate this transport with some simplifying assumptions: we ignore the Coriolis force, approximate the spectrum of turbulent convection by the Kolmogorov law, and couple this turbulence to the internal waves through their pressure fluctuations, following Press (1981) and Garcia Lopez & Spruit (1991). The local frequency of an internal wave varies with depth in a differentially rotating star, and it can vanish at some location, thus leading to enhanced damping (Goldreich & Nicholson 1989). It is this dissipation mechanism only that we take into account in the exchange of momentum between waves and stellar rotation. The flux of angular momentum is then an implicit function of depth, involving the local rotation rate and an integral representing the cumulative effect of radiative dissipation. We find that the efficiency of this transport process is rather high: it operates on a timescale of 10^7 years, and is probably responsible for the flat rotation profile which has been detected through helioseismology.
Matias Jose
Talon Suzanne
Zahn Jean-Paul
No associations
LandOfFree
Angular momentum transport by internal waves in the solar interior does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Angular momentum transport by internal waves in the solar interior, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Angular momentum transport by internal waves in the solar interior will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-585880