Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basi...31..299v&link_type=abstract
Bulletin of the Astronomical Society of India, vol. 31, p.299-301
Astronomy and Astrophysics
Astronomy
Sun, Mhd, Photosphere
Scientific paper
We report on the rapid variations of solar magnetic fields that appear to be enhanced significantly above the background variability, at a few locations within the solar active regions, as observed with the Michelson Doppler Imager (MDI) on board the SOHO spacecraft. The pressure fluctuations estimated to arise from this variability far exceed the general level of acoustic pressure fluctuations. The equivalent mechanical flux that could be generated from these rapid magnetic variations is more than adequate for the heating of the active region chromosphere and corona.
Kumar Brajesh
Ravindra B.
Venkatakrishnan Parameshwaran
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