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Russian-Bulgarian collaboration on studies of the interplanetary medium

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On the initiative of Professor Shcheglov, the Sternberg Astronomical Institute and Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (IZMIRAN) proceeded in 1995 to carry out joint investigations of the resonance emission of metal atoms released by the sublimation of solid material near the Sun. In 1998, Bulgarian colleagues joined our research. A search for resonance emissions in the circumsolar sky was made using the interferometric technique during total solar eclipses. At the eclipses of 1998 and 1999, the emission sought was finally detected, namely the resonance K line of Ca II ions with Doppler shift consistent with the Keplerian orbital motion of solid particles near the Sun. So, a new component of the solar corona radiation has been discovered. This contribution is dedicated to the memory of two outstanding scientists: Peter Shcheglov and Vladimir Dermendjiev.

Keywords: Solar corona; interplanetary medium; solar eclipses

Document Type: Research Article


Publication date: August 1, 2003

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