Broadening of Fe X (6374 Å) profiles above the limb in a coronal hole
- Cite this article as:
- Hassler, D.M. & Moran, T.G. Space Sci Rev (1994) 70: 373. doi:10.1007/BF00777895
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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.