Abstract
The partial solar eclipse on June 21, 2020, was observed with the RT-3 (λ = 4.9 cm) and RT-2 (λ = 3.2 cm) radio telescopes of the Kislovodsk Mountain Astronomical Station of the Central Astronomical Observatory of the Russian Academy of Sciences. The results of observation processing are presented. Radio data are compared with optical and X-ray observations. Local radio sources, i.e., an eruptive prominence and two polar coronal holes, are identified on the solar limb and disk. Variations in the radio brightness of unperturbed solar regions from the center toward the limb are plotted for the both wavelengths, and radio maps of the Sun are presented. The following parameters are calculated: the radio radius, the brightness and effective temperature of the solar disk center, the maximal brightness of the limb, the average brightness of the solar disk, and the average increase in the brightness toward the solar limb.
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REFERENCES
Baranov, N.V. and Tsvetkov, L.I., Radio imagery of the Sun at wavelengths of 3.5, 2.8, 2.25 and 1.95 cm during the period preceding the solar eclipse on July 11, 1991, Sov. Astron. Lett., 1992, vol. 18, no. 5, pp. 467–476.
De-Sheng, J. and Shi-Guang, L., Radio observational results of the annular solar eclipse on September 23, 1987 at 6 cm wavelength, Prog. Astron., 1990, vol. 8, no. 2, pp. 173–175.
Golubchina, O.A., Bogod, V.M., Korzhavin, A.N., Bursov, N.N., and Tokhchukova, S.H., Centimeter-wave radio emission of a high-latitude prominence, Astrophys. Bull., 2008, vol. 63, no. 1, pp. 34–42.
Shanmugaraju, A. and Umapathy, S., Radio spectrograph observations of the recent solar eclipse on October 24, 1995, Kodaikanal Obs. Bull., 1997, vol. 13, pp. 147–149.
Shramko, A.D. and Guseva, S.A., Study of the radio emission of coronal holes in the minimum of solar activity by the partial eclipse of August 1, 2008, at the Mountainous Astronomical Station of the Main Astronomical Observatory of the Russian Academy of Sciences, in Tr. XIV Vserossiiskoi konf. po fizike Solntsa “Solnechnaya i solnechno-zemnaya fizika-2010” (Proceedings of the XIV All-Russian Conference on Solar Physics “Solar and Solar–Terrestrial Physics-2010”), Stepanov, A.V. and Nagovitsyn, Yu.A., Eds., GAO RAN, 2010, pp. 459–462.
Shramko, A.D. and Guseva, S.A., Specific features of radio emissions of coronal holes based on eclipse and noneclipse observations at a solar activity minimum, Geomagn. Aeron. (Engl. Transl.), 2012a, vol. 52, no. 2, pp. 142–149.
Shramko, A.D. and Guseva, S.A., Studying local sources in the radio range based on the partial solar eclipse of January 4, 2011, at the Mountain Astronomical Station, Central Astronomical Observatory, Russian Academy of Sciences, Geomagn. Aeron. (Engl. Transl.), 2012b, vol. 52, no. 7, pp. 913–920.
Shramko, A.D. and Guseva, S.A., Chromospheric and coronal radio sources from observations of the partial solar eclipse of March 20, 2015, at the Mountain Astronomical Station of the Central Astronomical Observatory, Geomagn. Aeron. (Engl. Transl.), 2018, vol. 58, no. 4, pp. 464–468.
Shramko, A.D., Senik, V.A., and Tlatov, A.G., Observations of March 29, 2006 solar eclipse in the radio range at wavelengths of 3.2 and 4.9 cm, Cosmic Res., 2011, vol. 49, no. 2, pp. 93–98.
Shu-Rong, Z., Xing-Feng, Y., Zhi-Hai, Q., Shu-Ying, J., and Pei, L., Radio observation of the solar annular eclipse of September 23, 1987 at 3.2 cm wavelength, Chin. J. Space Sci., 1991, vol. 11, no. 1, pp. 67–75.
Tan, B., Yan, Y., Zhang, Y., Tan, C., Huang, J., Liu, Y., Fu, Q., Chen, Z., Liu, F., Chen, L., and Ji, G., Broadband radio spectral observations of the solar eclipse on 2008-08-01 and its implications on the quiet Sun atmospheric model, Sci. China, Ser. G, 2009, vol. 52, no. 11, pp. 1765–1772.
Velusamy, T., Kuiper, T., Levin, S., Dorcey, R., Kreuser-Jenkins, N., and Leflang, J., Goldstone Apple Valley Radio Telescope observations of 2012 solar eclipse: A multi-wavelength study of cm-λ gyroresonance emission from active regions, Publ. Astron. Soc. Pac., 2020, vol. 132, no. 1015.
Yurovskii, Yu.F., Radio emission of the undisturbed Sun and local sources at waves 5, 10.7, 12, and 95 cm according to observations of the 4 January 2011 eclipse in the Crimea, Izv. Krym. Astrofiz. Obs., 2012, vol. 108, no. 1, pp. 115–126.
Zheleznyakov, V.V., Radioizluchenie Solntsa i planet (Radio Emission of the Sun and Planets), Moscow: Nauka, 1964.
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The work was supported by the Russian Foundation for Basic Research (project no. 18-02-00856) and the Presidium of the Russian Academy of Sciences.
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Translated by O. Ponomareva
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Shramko, A.D., Guseva, S.A. Processing of Observations of the Partial Solar Eclipse on June 21, 2020, in the 3.2- and 4.9-cm Wavelength Regions at the Mountain Astronomical Station of the Central Astronomical Observatory. Geomagn. Aeron. 61, 905–909 (2021). https://doi.org/10.1134/S001679322106013X
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DOI: https://doi.org/10.1134/S001679322106013X