Sunspot gyroresonance emission at 17 GHz: A statistical study

Document Type

Article

Publication Date

1-1-2006

Abstract

We investigate the sunspot gyroresonance emission at 17 GHz using the synoptic database of the Nobeyama Radioheliograph. Our statistical study is based on full disk observations obtained during the maximum of Cycle 22 (1992-94). We study the center-to-limb variation of the brightness and polarization of the sunspot radio emission and present some cases of polarization reversal. We find that the radio emission is most likely 3rd-harmonic gyroresonance emission arising from 2000 G fields in transition region, or low corona temperatures. © 2006. Astronomical Society of Japan.

Identifier

33645156162 (Scopus)

Publication Title

Publications of the Astronomical Society of Japan

External Full Text Location

https://doi.org/10.1093/pasj/58.1.11

ISSN

00046264

First Page

11

Last Page

20

Issue

1

Volume

58

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