Magnetic field structure of active regions in the chromosphere - Observations at H-beta and Fe I 525.35 NM lines

Details Magnetic field structure of active regions in the chromosphere - Observations at H-beta and Fe I 525.35 NM lines Magnetic field structure of active regions in the chromosphere - Observations at H-beta and Fe I 525.35 NM lines

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997kfnt...13b..21g&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 13, p. 21

Astronomy and Astrophysics

Astrophysics

Solar Magnetic Field, Chromosphere, Solar Activity, H Beta Line, Metallicity, Photosphere, Solar Atmosphere, Iron

Scientific paper

We present the results of observations of longitudinal magnetic fields in two active regions on the sun. The observations were carried out at the Fe I 525.35 nm and H-beta lines with the double magnetograph of the Crimean Astrophysical Observatory. The active regions during the observations covered heliocentric angles of 16-67 deg. In our analysis, we compare the observed magnetic field in the H-beta line with the potential field. Photospheric line-of-sight data were used as boundary conditions for potential-theory field calculations. The vertical and transverse observed field components were derived. The week fields in the chromosphere had a larger inclination to the vertical than the potential fields. The difference between the inclinations of the fields decreased with the increasing magnetic intensity. For the highest strength, the vertical component of the observed field was higher by about 19 mT, and the transverse component was lower by 53 mT than those of the potential field. The structure of the magnetic field in the chromosphere stronger 25 mT corresponds to the structure of a force-free magnetic field.

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