Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh31a1987c&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SH31A-1987
Astronomy and Astrophysics
Astrophysics
[7507] Solar Physics, Astrophysics, And Astronomy / Chromosphere, [7519] Solar Physics, Astrophysics, And Astronomy / Flares, [7524] Solar Physics, Astrophysics, And Astronomy / Magnetic Fields, [7529] Solar Physics, Astrophysics, And Astronomy / Photosphere
Scientific paper
The three dimensional magnetic field of solar active regions is studied by comparing the observed and computed chromospheric magnetograms obtained at National Solar Observatory with SOLIS and NASA/NSO Spectromagnetograph. The model chromospheric field is obtained by extrapolating the observed photospheric field in to chromosphere with a potential (current-free) magnetic field model in Cartesian geometry. The long lived active regions display the strong-field non-potentiality during their initial phase and converse to a potential field configuration later.
Choudhary Debi Prasad
Sakurai Takashi
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