Broadening of the FeX (6374 {\AA}) profiles above the limb in a coronal hole

Details Broadening of the FeX (6374 {\AA}) profiles above the limb in a coronal hole Broadening of the FeX (6374 {\AA}) profiles above the limb in a coronal hole

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ssrv...70..373h&link_type=abstract

Space Science Reviews, Volume 70, Issue 1-2, pp. 373-377

Computer Science

9

Solar Corona, Coronal Holes, Solar Wind, Uv Spectroscopy

Scientific paper

Profiles of the visible Fe X (6374 Å) coronal emission line as a function of height above the limb were obtained out to 1.16 solar radii in a coronal hole using the NSO/Sacramento Peak Observatory Coronagraph, Universal Spectrograph and a CCD camera. These are the first coronal line profiles obtained as a function of height in a coronal hole from the ground. Analysis of the line widths suggests a large component of nonthermal broadening which increases with height ranging from 40 to 60 km/s, depending upon the assumed temperature or thermal component of the profile.

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