Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.1711r&link_type=abstract
American Astronomical Society, SPD meeting #42, #17.11; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Meridional Flow (MF) speeds are only on the order of 10-20 m/s. For this reason, MF is the most difficult transport velocity to measure. However, these velocities can be measured by tracking the motion of small magnetic elements on the surface of the sun and averaging over a Carrington Rotation (CR). Magnetograms obtained by the HMI instrument aboard SDO are turned into maps of the magnetic features. Strips from these maps, taken 8 hours apart, are then cross-correlated to determine the distances in latitude and longitude that flux elements have moved, thus producing MF and differential rotation velocities as functions of latitude. Averaging the MFs obtained for every 8 hour separation over a 27-day CR produces a MF profile for that CR. This process was repeated for data with varying magnetic element strength. Results show that the MF is more complex than previously thought. It varies with the strength of the magnetic elements. The MF is slower for the stronger flux elements. This is consistent with stronger flux elements being anchored deeper in the Sun's surface shear layer where the MF is slower. New Surface Flux Transport and Solar Dynamo models should reproduce solar conditions while including these variations.
Hathaway David
Rightmire Lisa
No associations
LandOfFree
Magnetic Element Meridional Flow: Dependence on Strength 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 Magnetic Element Meridional Flow: Dependence on Strength, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic Element Meridional Flow: Dependence on Strength will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1204501