Spectroscopic study of the solar eclipse of August 1999 to understand the radial and latitudinal profiles of wind and temperature
Abstract
The determination of the radial temperature and the wind profiles of the solar corona is of immense importance in understanding the coronal heating mechanism and the dynamics of the coronal features. Cram (1976) provides the theory for the formation of the K-coronal spectrum and a method for determining the radial profile of the coronal temperature. A slit-based spectroscopic study has been performed by Ichimoto et.al (1996) on the solar corona in conjunction with a solar eclipse to evaluate the radial temeperature profiles of the solar corona. We have modified Cram's theory to incorporate the role of the solar wind in the formation of the K-corona. We are building a fiber optic based spectrograph to study the solar eclipse of August 1999. In this instrument one end of the twenty-five fiber tips at the focal plane of the telescope are positioned to see different radii and latitudes of the solar corona. The other ends of the fibers are vertically aligned and placed at the primary focus of the collimating lens of the spectrograph. By calculating the intensity ratios at wind and temperature sensitive wavelengths we believe that both the temperature and wind profiles could be determined at different radii and latitudes.
- Publication:
-
American Astronomical Society Meeting Abstracts #194
- Pub Date:
- September 1999
- Bibcode:
- 1999AAS...19410802R