Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ihy..worke..26a&link_type=abstract
2nd UN/NASA Workshop on International Heliophysical Year and Basic Space Science. Proceedings of the conference held 27 Novembe
Astronomy and Astrophysics
Astrophysics
Scientific paper
a_ambastha@rediffmail.com We have studied spatial and temporal evolution of some flare productive active regions using high cadence photospheric magnetograms and Dopplergrams. In addition, chromospheric H-alpha filtergrams have been used to identify flux emergences, large proper motions and development of velocity flows in relation to the flare sites. Magnetic flux and velocity changes have been found at these sites before and after large flares. The 3-D power spectra of p-mode oscillations have been obtained using ring diagram technique. These spectra are then used to look for helioseismic response of the flares on the amplitude, frequency and width of the p-modes. In the flaring active region, p-mode power enhancement and a steep gradient in the meridional velocity are found as compared to the quiet regions. A comparison of flaring active regions has been carried out with less productive active regions.
No associations
LandOfFree
Signatures of Large Flares on Photospheric Magnetic and Velocity Fields 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 Signatures of Large Flares on Photospheric Magnetic and Velocity Fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signatures of Large Flares on Photospheric Magnetic and Velocity Fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1338250