Coronal bright points at 6 and 20 centimeter wavelengths

The paper presents the results of near-simultaneous observations of bright points at 6 and 20 cm for a time interval of 10 hr using the VLA. It is shown that, at both 6 and 20 cm, the radio sources in the quiet sun have a very close association with bipolar features seen in magnetograms and with dar...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 325; p. 905
Main Authors Kundu, M. R., Schmahl, E. J., Fu, Q.-J.
Format Journal Article
LanguageEnglish
Published Legacy CDMS 15.02.1988
Subjects
Solar Physics
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Summary:The paper presents the results of near-simultaneous observations of bright points at 6 and 20 cm for a time interval of 10 hr using the VLA. It is shown that, at both 6 and 20 cm, the radio sources in the quiet sun have a very close association with bipolar features seen in magnetograms and with dark features in He I 10830 A spectroheliograms. The paper discusses the associations and the distributions of size, brightness, and temporal variation of the microwave bright points. It is found that the brightness temperatures of the 6 and 20 cm bright points are in the approximate ratio 0.09:1 expected from the emission mechanism being thermal bremsstrahlung.
Bibliography:CDMS
Legacy CDMS
ISSN:0004-637X
1538-4357
DOI:10.1086/166062