| タイトル | Spectral observations of active region sources with RATAN-600 and WSRT |
| 著者（英） | Korzhavin, A. N.; Bogod, V. M.; Kundu, M. R.; Gel'frejkh, G. B.; Nindos, A.; Alissandrakis, C. E.; Borovik, V. N. |
| 著者所属（英） | NASA |
| 発行日 | 1993-03-01 |
| 言語 | eng |
| 内容記述 | We present spectral observations of neutral line and sunspot associated sources obtained with the RATAN-600 radio telescope and the WSRT in the wavelength range of 2 to 6 cm. Sources associated with large sunspots have flat spectra, while neutral line sources have very steep spectra. In the case of a large spot we estimated the magnetic field to be at least 2700 G at the base of the transition region and 1800 G in the low corona. We consider possible interpretations of the radio emission above the neutral lines. Gyroresonance emission at the fourth harmonic is inadequate, whereas emission from a small population of nonthermal electrons (total number 10 exp 30 to 10 exp 31) with a delta = 3 power law distribution seems to be sufficient. |
| NASA分類 | SOLAR PHYSICS |
| レポートNO | 94A13130 |
| 権利 | Copyright |
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