Magnetic field and turbulent velocities in the solar corona

Turbulent and directed mass motions in various structures of the low corona

“…[6] On the images obtained on 11 August 1999, we have also found the regions with cool coronal emission (CCE). The mean turbulent velocities in the coronal cavities around the bulks of cold plasma with T ∼ 5 × 10 4 K-1.3 × 10 5 K turned out to be 32.5 km s −1 [Delone et al, 2003a].…”

“…[4] To find turbulent velocities, we have reanalyzed the profiles of the 5303Å (Fe XII) line measured during total solar eclipses of 1968, 1981, 1990, and 1999 Makarova, 1969, 1975;Delone et al, 1989aDelone et al, , 1989bDelone et al, , 2002aDelone et al, , 2002bDelone et al, , 2003a. We have managed to determine turbulent velocities in morphologically different regions of the corona:…”

“…1 of 6 GI2004 delone et al: turbulent and directed mass motions GI2004 Delone et al [1989aDelone et al [ , 1989bDelone et al [ ] 1999 Fabry-Perot Fe XIV 5303 14 20 28 Delone et al [2002aDelone et al [ , 2003a quiet corona (QC), coronal hole (CH), and quiescent prominence cavity (QPC).…”

“…The ξ values have been determined resulting from reanalyzing the obtained earlier eclipses data. Delone et al [2003b] collected data from publications devoted to the investigation of the turbulent velocities in the quiet corona and based both on the ground and space observations. The observation were performed in the far ultraviolet spectral region (330-1500Å) and in the visual λ = 5303Å, λ = 6374Å, λ = 5694Å.…”

“…We have used the results from published papers, based both on the ground and space observations in visual and ultraviolet spectral regions and our observations of four eclipses. the known technique [Delone et al, 2003b]. The Doppler width of an optically thin line profile ∆λD after correction for the instrumental broadening is related to the temperature T and the turbulent velocity ξ by the equation…”