Synoptic Maps of Mass Flows Beneath the Solar Surface by Time-Distance Helioseismology

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

We have derived the subsurface horizontal flow velocity fields for several solar Carrington rotations from 1996 to 2001, covering the period from the activity minimum to maximum of solar cycle 23, by analyzing SOHO/MDI Dynamics data. The synoptic flow maps have been made from the near-surface down to 12 megameters below the photosphere. The torsional oscillation and meridional flows, as well as the flow vorticity have been calculated from the flow maps as a function of latitude. It is found that after the subtraction of the solar minimum data, the residual meridional flows converge toward the activity belts, and migrate toward the equator together with the sunspot zones. In addition, the corresponding residual vorticity peaks in the activity belts, having the opposite signs in Northern and Southern hemispheres. Comparing the synoptic flow maps with the synoptic magnetic field maps, it is found that the solar plasma rotates faster where the photospheric magnetic field is stronger. An approximate linear relation between the magnetic strength and the rotational speed has been obtained from these data.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Synoptic Maps of Mass Flows Beneath the Solar Surface by Time-Distance Helioseismology 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 Synoptic Maps of Mass Flows Beneath the Solar Surface by Time-Distance Helioseismology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synoptic Maps of Mass Flows Beneath the Solar Surface by Time-Distance Helioseismology will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-988910

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.