Broadening of Fe X (6374 Å) profiles above the limb in a coronal hole |
| |
| Authors: | D. M. Hassler T. G. Moran |
| |
| Affiliation: | (1) Harvard-Smithsonian Center for Astrophysics, 02138 Cambridge, MA, USA;(2) NASA Goddard Space Flight Center, 20771 Greenbelt, MD, USA;(3) Present address: High Altitude Observatory/NCAR, Boulder, 80307 Boulder, CO, USA |
| |
| Abstract: | ![]()
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. |
| |
| Keywords: | Solar corona Coronal holes Solar wind UV spectroscopy |
| 本文献已被 SpringerLink 等数据库收录！ |
|
