Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000kfnts...3..449l&link_type=abstract
Kinematika i Fizika Nebesnykh Tel, Suppl, no. 3, p. 449-450
Astronomy and Astrophysics
Astronomy
Scientific paper
The extremely narrow metallic emissions were observed in several solar flares of 1989, 1991 and 2000. Our analysis is based on the Stokes I ± V and I ± Q spectra obtained using the Echelle spectrograph of the Astronomical Observatory of the Taras Shevchenko National University of Kyiv. The careful data reduction for excluding the instrumental broadening effect shows that the intrinsic half width of the emission peaks in the Fe I lines was in the range from 1-2 to 10 pm. The extraordinary narrow peaks (nearly 1.5 pm) are inherent in 5-10 percents of a total number of observed profiles, mainly in the case of very weak flare emissions. The obtained data point out to some specific process like the ``frozening" of plasma motions in the strong and small-scale magnetic fields.
Golbraikh Ephim
Gordovsky Yu. M.
Lozitska N. I.
Lozitsky V. G.
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