Study of motions in solar coronal regions with different temperatures and search for weak Hα emission

Details Study of motions in solar coronal regions with different temperatures and search for weak Hα emission Study of motions in solar coronal regions with different temperatures and search for weak Hα emission

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999astl...25...46d&link_type=abstract

Astronomy Letters, Volume 25, Issue 1, January 1999, pp.46-51

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We determine the velocities of matter in coronal regions with different temperatures from the profiles of the coronal Fe X lambda 6374 A and "weak" H-alpha lambda 6563 A lines. Interferograms of the corona were obtained during the solar eclipse of March 9, 1997. Many profiles of these two lines have a complex shape. An analysis of the structure of the profiles and their shifts reveals the presence of moving features in the corona. The line-of-sight velocities in the Fe X and H-alpha emission regions are close to each other and, in some cases, reach 100 km/s. The temperature of the cool component of the corona is estimated to be 4 x 10^4 K.

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