Hostname: page-component-669899f699-tzmfd Total loading time: 0 Render date: 2025-04-24T18:49:50.875Z Has data issue: false hasContentIssue false
  • English
  • Français

Coronal Magnetic Fields from the Effect of the Double Inversion of Circular Polarization of Radio Emission

Published online by Cambridge University Press:  12 April 2016

V.M. Bogod ,
G.B. Gelfreikh ,
B.I. Ryabov  and
S.R. Hafizov
V.M. Bogod
Affiliation:
Special Astrophysical Observatory, Russian Academy of Sciences, St. Petersburg 196140, Russia
G.B. Gelfreikh
Affiliation:
Special Astrophysical Observatory, Russian Academy of Sciences, St. Petersburg 196140, Russia
B.I. Ryabov
Affiliation:
Special Astrophysical Observatory, Russian Academy of Sciences, St. Petersburg 196140, Russia
S.R. Hafizov
Affiliation:
Special Astrophysical Observatory, Russian Academy of Sciences, St. Petersburg 196140, Russia

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present preliminary results of radio observations of the Sun with the Panoramic Analyzer of the Spectrum (21 channels in 1.8 – 8.2 cm wavelength range) of the radio telescope RATAN-600. Observations on 1992 January 9 – 10 have shown double inversion of the sign of a local source through the microwave wavelength range with fine spectral structure. This phenomenon can be treated as a result of mode coupling when the electromagnetic wave crosses two regions of quasi-transverse propagation (QT-region). Using this treatment we have found the strength of the coronal magnetic field at a number of points in the corona above an active region. The results also imply that trans-equatorial coronal arches affect the structure of magnetic fields at heights of about 3 . 1010 cm with B ~ 5 – 10 G.

Type
Session 5. Fields in the Chromosphere and Corona
Information
International Astronomical Union Colloquium , Volume 141: The Magnetic and Velocity Fields of Solar Active Regions , 1993 , pp. 302 - 305
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

Gelfreikh, G.B., Peterova, N.G., & Ryabov, B.I. 1987, Solar Phys., 108, 89 CrossRefGoogle Scholar
Peterova, N.G. & Akhmedov, Sh.B. 1974, Soviet Astron., 17, 768 Google Scholar
Ryabov, B.I. & Spector, A.R. 1983, Publ. Debrecen Heliophys. Obs., 5, 323 Google Scholar
Zheleznyakov, V.V. 1970, Radio Emission of the Sun and Planets, (New York: Pergamon Press)Google Scholar