A New Photometric Technique for Registration of the Far Solar Corona (up to 20 Solar Radius far from the Sun) from ground observations

Details A New Photometric Technique for Registration of the Far Solar Corona (up to 20 Solar Radius far from the Sun) from ground observations A New Photometric Technique for Registration of the Far Solar Corona (up to 20 Solar Radius far from the Sun) from ground observations

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...3e..32s&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

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The purpose of this work is to develop a new technique for registration of the far solar corona from ground observations. It was called "Colour Slide RGB- Photometry". It allows research and estimation of finest differences of the colour and the structure of the elements of the images. It makes possible also visualization of fine invisible with naked eye details (due to the visually undetectably low differences of their brightness from the neighbor parts of the image) of the studied objects. We used this new technique to study otherwise invisible details of the solar corona and to register the far solar corona far beyond previous ground observations. Obtained images of eclipsed solar corona are compared with the images from the Large Angle Space Coronagraph (LASCO)- C3 and C2 coronagraphs registered simultaneously from the space. Ground images filtered by the new technique reveal the main structures of the far solar corona recorded from the space up to 20 solar radius far from the Sun during the total solar eclipse on 29 March 2006. Similar results had been obtained from our images of the total solar eclipse on 11 August 1999. Colour Slide RGB- Photometry removed the interference from the atmospheric halo and the optical halo of the telescope (lenses) dominating ground images of the far solar corona. In conclusion new technique is very useful for registration of the far solar corona from ground observations producing images comparable to these from space observations.

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