dc.contributor.author |
Alissandrakis, C. E |
|
dc.contributor.author |
Kundu, M. R |
|
dc.contributor.author |
Shevgaonkar, R. K |
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dc.date.accessioned |
2008-07-09T06:47:25Z |
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dc.date.available |
2008-07-09T06:47:25Z |
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dc.date.issued |
1991-11 |
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dc.identifier.citation |
Astronomy and Astrophysics, Vol. 251, No. 1, pp. 276 - 284 |
en |
dc.identifier.issn |
0004-6361 |
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dc.identifier.uri |
http://hdl.handle.net/2248/2581 |
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dc.description.abstract |
High-resolution observations are presented of two active regions at 6 and 20 cm over a period of 5 days, together with H-alpha and photospheric magnetic fields. The large-scale emission at 20 cm is associated with the H-alpha plage. In one region the strongest source was over the neutral line, near the tip of an active-region filament, which indicates that the emission probably originated in small-scale coronal loops. In the second region the peak of the emission was near a well-developed sunspot. Neither region showed evidence of large-scale loops joining their preceding and following parts. Several other sources were observed at 20 cm; a source associated with an H-alpha plage region crossed by a filament and one associated with a small bipolar region are briefly discussed. The 6-cm emission from a well-developed spot showed clearly the characteristics expected from gyroresonance model computations. |
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dc.format.extent |
5207050 bytes |
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dc.format.mimetype |
application/pdf |
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dc.language.iso |
en |
en |
dc.publisher |
The European Southern Observatory |
en |
dc.relation.uri |
http://adsabs.harvard.edu/abs/1991A%26A...251..276A |
en |
dc.subject |
Coronal loops |
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dc.subject |
H alpha line |
en |
dc.subject |
Photosphere |
en |
dc.subject |
Solar flares |
en |
dc.subject |
Solar magnetic field |
en |
dc.subject |
Solar radio emission |
en |
dc.subject |
Sunspots |
en |
dc.subject |
Very large array (Vla) |
en |
dc.title |
VLA observations of solar active regions at 6 and 20 CM |
en |
dc.type |
Article |
en |