The radio brightness distribution along the solar limb observed on the Siberian Solar Radio Telescope
The radio brightness distribution at 5.2 cm has been obtained along the entire solar limb down to a level of 0.01 of brightness temperature at the disk center T 0 during the solar minimum. The measurements are based on strip scans from the Siberian Solar Radio Telescope. Data reduction included mode...
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Published in | Astronomy reports Vol. 49; no. 11; pp. 939 - 945 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Heidelberg
Springer Nature B.V
01.11.2005
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Subjects | |
Online Access | Get full text |
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Summary: | The radio brightness distribution at 5.2 cm has been obtained along the entire solar limb down to a level of 0.01 of brightness temperature at the disk center T 0 during the solar minimum. The measurements are based on strip scans from the Siberian Solar Radio Telescope. Data reduction included model fitting of an actual solar scan for each position angle. The maximum limb brightness, 1.37 T 0 , in the derived distribution is at equatorial direction, where the radio radius exceeds the photosphere radius by 7%. Toward the poles, the brightness peak and radio radius gradually decrease to 1.01 T 0 and 1.005 R 0. The derived two-dimensional brightness distribution was used to calculate radio radius as a function of position angle for several wavelengths from 4 to 31.6 cm. These dependences are consistent with RATAN-600 observations at position angles 0DG and 25DG. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 1063-7729 1562-6881 |
DOI: | 10.1134/1.2127997 |