aat Acta Astrophys. Tau. Acta Astrophysica Taurica 2712-925X Kiselev Nikolai Nikolaevich, Mosсow, settlement Moskovskii, Tat'yanin Park Str., 12, Moscow, Russia. RU 94 Magnetism and Activity of the Sun - 2022 Conference proceedings Circular polarization of millimeter emission from solar flares Ryzhov Vladimir Shivrina Polina Smirnova Victoria Bauman Moscow State Technical University, 2nd Baumanskaya 5, Moscow 105005, Russia Bauman Moscow State Technical University, 2nd Baumanskaya 5, Moscow 105005, Russia Crimean Astrophysical Observatory, Nauchny 298409 24 12 2024 5 4 29 34 09 12 2024 Copyright (c) 2024 Vladimir Ryzhov, Polina Shivrina, Victoria Smirnova 2024 Vladimir Ryzhov, Polina Shivrina, Victoria Smirnova The metadata for this submission is licensed under a Creative Commons Attribution 4.0 International License. Copyright and publishing rights for texts published in Acta Astrophysica Taurica is retained by the authors, with first publication rights granted to the journal.Texts are free to use with proper attribution and link to the licensing (Creative Commons Attribution 4.0 International).

We present new observations of circular polarization of solar flares observed with the Bauman Moscow State Technical University radio telescope RT-7.5 at a frequency of 93 GHz. Time profiles of the right and left circular polarization  intensity of radio emission obtained for several flare events are analyzed. It was shown that the upper limit of the degree of circular polarization for the maximum phase of the studied flares is ∼5%.

Sun radio emission polarization of millimeter emission polarization receiver This work was partially supported by the RFBR grant No. 20-52-26006 Czech Republic_a and the Ministry of Education and Science research project No. 1021051101548-7- 1.3.8. Altyntsev A., Meshalkina N., Myshyakov I., Pal’shin V., Fleishman G., 2017. Solar Phys., vol. 292, iss. 9, p. 137. Silva D.F., Valio A.B.M., 2016. In Dorotovic I. et al. (Eds), Millimeter observation of solar flares with polarization. ASP Conf. Ser., San Francisco: ASP, vol. 504, p. 55. Smirnova V.V., Tsap Yu.T., Shumov A.V., et al., 2017. Radiostroenie, no. 6, pp. 14–26. (In Russ.) Tsap Yu.T., Smirnova V.V., Motorina G.G., et al., 2018. Solar Phys., vol. 293, no. 3, p. 50.