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Radial Velocities of Dust Particles in the F-Corona

Published online by Cambridge University Press:  27 February 2018

L.I. Shestakova ,
A.K. Aimanov  and
G.K. Aimanova
L.I. Shestakova
Affiliation:
Fesenkov Astrophysical Institute, 480068, Almaty, Kazakstan
A.K. Aimanov
Affiliation:
Fesenkov Astrophysical Institute, 480068, Almaty, Kazakstan
G.K. Aimanova
Affiliation:
Fesenkov Astrophysical Institute, 480068, Almaty, Kazakstan

Abstract

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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)

Type
IX. Zodiacal Light and Thermal Emission
Information
International Astronomical Union Colloquium , Volume 150: Physics, Chemistry and Dynamics of Interplanetary Dust , 1996 , pp. 341 - 344
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

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