Physics – Optics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.0611r&link_type=abstract
American Astronomical Society, SPD meeting #37, #6.11; Bulletin of the American Astronomical Society, Vol. 38, p.227
Physics
Optics
Scientific paper
We have developed ground based instruments that can simultaneously and globally measure the temperature and the flow speeds of the low coronal electrons during a total solar eclipse. These two instruments were successfully operated during the total solar eclipse on 29 March 2006 in Libya. In one instrument, MACS for Multi Aperture Coronal Spectrometer, fiber optics at the focal plane of a telescope carried visible coronal light from different latitudes and heights in the low solar corona to produce simultaneous spectra. The K-coronal spectra derived from these spectra can be used to derive the coronal electron temperature and its flow speed. In the other instrument, ISCORE for Imaging Spectroscopy of Coronal Electrons, images of the corona were produced through four filters centered at four wavelength positions in the visible region each with a bandpass of 50 Angstroms. Here the ratio of intensities of the K-coronal light from two of the filters would provide information on the coronal temperature, while the intensities through the other two filters would yield information on the flow speeds of the coronal electrons. While these two techniques compliment each other, together they can produce a global map of the coronal electron temperature and its flow speed in the low solar corona. Additionally it would also yield information on the electron acceleration. We are in the process of integrating this technique using the SolarC coronagraph located at the Mees Solar Observatory in Haleakala, Hawaii. If this proves to be successful then these techniques would yield these important coronal properties on demand.
Cyr C. C. St.
Davila Jose Manuel
Reginald Nelson Leslie
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