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Latitude and solar-cycle dependence of the height of 9.1 cm radio emission

โœ Scribed by W. Graf; R. N. Bracewell

Publisher
Springer
Year
1973
Tongue
English
Weight
602 KB
Volume
33
Category
Article
ISSN
0038-0938

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โœฆ Synopsis

The apparent height of radio sources above the photosphere was determined for the period of 1968-1971, by a method which makes use of the displacement in latitude of the centroid of the radio emission relative to the associated optical feature.

The apparent height fell progressively in time by amounts that would not have been noticeable in earlier observations. Furthermore, in any given year the height was found to depend on latitude, being larger at low latitudes.

It remains to be seen to what extent these variations represent real changes in height and to what extent they are apparent. In either case, modification of solar atmospheric models will be required to account for these previously unreported phenomena.

๐Ÿ“œ SIMILAR VOLUMES

The height of 9.1 cm solar emission from
The height of 9.1 cm solar emission from latitude shift
โœ W. Graf; R. N. Bracewell ๐Ÿ“‚ Article ๐Ÿ“… 1973 ๐Ÿ› Springer ๐ŸŒ English โš– 416 KB

Active regions that are sources of microwave solar emission should appear displaced in latitude relative to the associated optical feature and from this displacement it should be possible to deduce the height. Although the displacement is only about one-third of a rain of' arc at the most, it was fo