Radial Velocities of Dust Particles in the F-Corona

Lyubov I Shestakova, A. K. Aimanov, G. K. Aimanova

1996

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DOI 10.1017/s025292110050181x
Data confidence 70 medium
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Abstract

Abstract Observations of radial velocities in the F-corona in the elongation range from 3 to 6 solar radii were carried out on July 11, 1991 (Mexico, La Paz) by means of a Fabry-Perot spectrograph. The Fraunhofer lines in the spectral region of H and K Call were used. The average velocities to the West and to the East of the Sun within 30° of the ecliptic plane are +30 km/s and -27 km/s respectively. This confirms the main results of the F-corona radial velocity observations by Shcheglov et al. (1987), Shestakova (1987) on July 31, 1981 about predominance of prograde Keplerian motion of the dust near the ecliptic plane and the effective radius of dust grains (≈0.4μm)