Fabry-Perot Interferometric Study of the Green Coronal line during the Total Eclipse of 2001 from Zambia

Details Fabry-Perot Interferometric Study of the Green Coronal line during the Total Eclipse of 2001 from Zambia Fabry-Perot Interferometric Study of the Green Coronal line during the Total Eclipse of 2001 from Zambia

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...3e...2c&link_type=abstract

Solar Active Regions and 3D Magnetic Structure, 26th meeting of the IAU, Joint Discussion 3, 16-17 August, 2006, Prague, Czech R

Physics

Scientific paper

We report an interesting ground based Fabry-Perot interferometric experiment on the green coronal line at 5303 Å carried out successfully during the total eclipse of 21 June 2001 from Lusaka.Unlike as in earlier experiments a cooled CCD was used to record as many as 17 Interferograms during the 194 sec of totality. The instrumental profile is well determined by a green He-Ne laser and has a FWHM of 0.2 Å. The Fabry-Perot was off centred with respect to the solar disk to permit wider fringe coverage of the corona. Radial scans from fringe centre of only one interferogram number over 500 and each scan has several fringes. The data base spread over 17 interferograms is huge and has been only partially analysed. Line width temperatures derived from fringes analysed so far range from 2.4 to 3.7 million degrees and many profiles are asymmetric. The data base permits a search of line width oscillations at many positions in the corona with a temporal resolution of a few seconds which has implications for wave heating of the corona. Details of the experiment and emerging results will be presented.

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