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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| Veröffentlicht in: | Astrophys. J.; (United States) 1988-02, Vol.325, p.905 |
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| container_title | Astrophys. J.; (United States) |
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| creator | Kundu, M. R. Schmahl, E. J. Fu, Q.-J. |
| description | 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. |
| doi_str_mv | 10.1086/166062 |
| format | Article |
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J.; (United States)</jtitle><date>1988-02-15</date><risdate>1988</risdate><volume>325</volume><spage>905</spage><pages>905-</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>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.</abstract><cop>Legacy CDMS</cop><doi>10.1086/166062</doi></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0004-637X |
| ispartof | Astrophys. J.; (United States), 1988-02, Vol.325, p.905 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_crossref_primary_10_1086_166062 |
| source | NASA Technical Reports Server; Alma/SFX Local Collection |
| subjects | 640104 - Astrophysics & Cosmology- Solar Phenomena ATMOSPHERES BREMSSTRAHLUNG CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS DISTRIBUTION ELECTROMAGNETIC RADIATION MICROWAVE RADIATION RADIATIONS SIZE SOLAR CORONA Solar Physics SOLAR RADIATION SPATIAL DISTRIBUTION STELLAR ATMOSPHERES STELLAR CORONAE STELLAR RADIATION TEMPERATURE MEASUREMENT VARIATIONS |
| title | Coronal bright points at 6 and 20 centimeter wavelengths |
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