Solar corona heating and microwave variations
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| 1Gelfreikh, GB, 2Goldvarg, TB, 1Kopylova, Yu.G, 1Nagovitsin, YA, 3Tsap, YT, 3Tsvetkov, LI 1Main Astronomical Observatory of the Russian Academy of Sciences, St. Petersburg, Russia 2B.B. Gorodovikova Kalmyk State University, Elista, Republic of Kalmykia, Russia 3Scientific-Research Institute «Crimean Astrophysical Observatory» of the Ministry for Education and Science of Ukraine, Nauchny, Crimea, Ukraine |
| Kosm. nauka tehnol. 2002, 8 ;(Supplement2):243-247 |
| https://doi.org/10.15407/knit2002.02s.243 |
| Publication Language: Russian |
Abstract: Based on observational data obtained in September 2001 using RT-22 CrAO on frequency channels 8.6 and 15.4 GHz, quasi-periodic variations of microwave radiation from active regions of the Sun with periods T<10 min are investigated using wavelet analysis. It was found that oscillations with T≈3 min have the largest amplitude, while quasiperiodic variations with T<10 s were suppressed. Oscillations of radiation with T=10 ... 40 s, which are associated with disturbances of the Alfven type in the upper atmosphere of the Sun, are detected.
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References:
1. Nindos A., Alissandrakis C. E., Gelfreikh G. B., et al. In: Astron. Astrophys., 386, 658–673 (2002).
https://doi.org//10.1051/0004-6361:20020252
2. De Pontieu, Martens P. C., Hudson H. S. In: Astrophys. J., 558, 859–871 (2001).
https://doi.org//10.1086/322408
3. Gordon B. E., Hollweg J. V. In: Astrophys. J., 266, 373–382 (1983).
https://doi.org//10.1086/160785