Electron temperatures and its bulk flow speeds in the low solar corona measured during the total solar eclipse on 29 March 2006 in Libya

Details Electron temperatures and its bulk flow speeds in the low solar corona measured during the total solar eclipse on 29 March 2006 in Libya Electron temperatures and its bulk flow speeds in the low solar corona measured during the total solar eclipse on 29 March 2006 in Libya

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh13b1535r&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SH13B-1535

Physics

Optics

7509 Corona

Scientific paper

We conducted an experiment that measured the K-coronal spectra in the visible wavelength region, simultaneously at multiple locations in the low solar corona in conjunction with the total solar eclipse on 29 March 2006 in Libya. The shapes of these measured K-coronal spectra were then matched with K-coronal models with different combinations of electron temperatures and electron bulk flow speeds to obtain the best fit. Results show electron temperatures and bulk flow speeds of 1.10 ± 0.05 MK, 103.0 ± 92.0 kms-1; 0.98 ± 0.12 MK, 0.0 + 10.0 kms-1; 0.70 ± 0.08 MK, 0.0 + 10.0 kms-1 at 1.1 R&sun; in the solar north, east and west, respectively, and 0.93 ± 0.12 MK, 0.0 + 10.0 kms-1 at 1.2R&sun; in the solar east, in agreement with expectations. The instrument used in this experiment, (MACS)for Multi Aperture Coronal Spectrograph, used fiber optics in the focal plane of a 12 inch Schmidt Cassegrain telescope that were positioned at the locations where the above results were obtained. The light from these fibers were then simulteously fed in to a spectrograph that contained only reflective optics for the purpose of enhancing the transmission of light in the blue end of the spectrum. This was important because steep intensity gradients occurred in this region, which distinguished between different K-coronal models.

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