Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...482l.207k&link_type=abstract
Astrophysical Journal Letters v.482, p.L207
Astronomy and Astrophysics
Astronomy
80
Methods: Data Analysis, Convection, Sun: Rotation, Sun: Interior, Sun: Activity, Sun: Oscillations
Scientific paper
We report on the first successful measure of the zonal variations of the Sun's differential rotation (so-called torsional oscillations) by helioseismology. Using new helioseismic data from the Michelson Doppler Imager on board SOHO, we have detected zonal flow bands with velocity variation of 5 m s-1 at a depth of 2--9 Mm beneath the surface. The subsurface flow is inferred from rotational splitting of frequencies of the fundamental mode of solar oscillations in the range of angular degree l from 120 to 250, using a 144 day uninterrupted time series of the Sun's Doppler velocities. The structure of the subsurface shear flow resembles the pattern of the torsional oscillations observed on the surface. Comparing with previous surface measurements, we found evidence for migration of the flow bands towards the equator.
Kosovichev Aleksandr G.
Schou Jepser
No associations
LandOfFree
Detection of Zonal Shear Flows beneath the Sun's Surface from f-Mode Frequency Splitting 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 Detection of Zonal Shear Flows beneath the Sun's Surface from f-Mode Frequency Splitting, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of Zonal Shear Flows beneath the Sun's Surface from f-Mode Frequency Splitting will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1473060