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

Abstract 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...

Full description

Saved in:
Bibliographic Details
Published in:International Astronomical Union Colloquium 1993, Vol.141, p.302-305
Main Authors: Bogod, V.M., Gelfreikh, G.B., Ryabov, B.I., Hafizov, S.R.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Abstract 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 . 10 10 cm with B ~ 5 – 10 G.
ISSN:0252-9211
DOI:10.1017/S0252921100029298