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Detection of the 4th harmonica in the cyclotron radiation above the spot
Radiation of the 4th harmonica of the gyro-frequency in the Solar corona
above the spot was detected due to detailed spectroscopic observations
at RATAN-600 with high accuracy polarization measurements. Radio
astronomical measurements of cyclotron radiation are based on the
fact that radiation generated in a magnetic field is circularly
polarized, and the sign and degree of polarization depend on the
type of radiation mechanism, temperature, and density of plasma,
in the place where the radiation emerged and propagated. In the
case of the defined emission mechanism, polarization measurements
of radio emission provide an opportunity to determine the magnetic
field strength. Significance of the result obtained is defined by
the importance of measurements of coronal magnetic fields in those
areas of the solar atmosphere, where traditional optical methods
based on the Zeeman and Hanle effects are inefficient because of
high coronal temperatures.
Authors:
Kaltman T.I., Bogod V.M., Storozhenko A.A.
Published:
The result was presented at the "Solar and Solar-Terrestrial Physics 2017"
XXI Russian Annual Conference on Solar Physics
(October 0, 2017 - October 13, 2017), Pulkovo Observatory
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