Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 64, p. 13-20 (2021)
Joint studies of solar flares at the Astronomical observatory of Taras Shevchenko National University of Kyiv and the Main Astronomical observatory of the Academy of Science of Ukraine
N. Kondrashova, PhD
Main Astronomical Observatory of National Academy of Sciences of Ukraine, Kyiv, Ukraine
Abstract
Joint studies of changes in the photosphere and chromosphere before and during solar flares at the Astronomical Observatory of Taras Shevchenko Kyiv University and the Main Astronomical Observatory of the National Academy of Sciences of Ukraine are described. Observations of flaring-active regions were performed at solar horizontal telescopes of the GAO NASU Ernest Gurtovenko’s ATsU-5 in Kyiv, ACU-26 on the Terskol peak and at the French-Italian solar tower telescope THEMIS with the spectropolarimeter in the Canary Islands in Spain. Significant variations in the spectral lines formed in the photosphere due to flares have been detected. Some results of modeling of the photosphere and chromosphere before and during flares of different classes are given. Conclusions are made regarding the important role of the photosphere in the flare process, the sequence of propagation of flare perturbation in the lower layers of the solar atmosphere.
Key words
Sun, solar flaring-active regions, solar flares, photosphere, chromosphere, semiempirical models.
References
Abramenko, V.I., Baranovsky, E.A. 2004, Solar Physics, 220, 1, 81
Alikaeva, K.V., Baranovskij, E.A., Kondrashova, N.N., Redyuk, T.I., Rudnikova, E.G. 1995, Kinematics Phys. Celest. Bodies, 11, 2, 7.
Alikaeva, K.V., Baranovskii, E.A., Polupan, P.N. 1986, Kinematika i Fizika Nebesnykh Tel, 2, 4, 27
Alikaeva, K.V., Burlov-Vasil’ev, K.A., Vasil’eva, I.E., et al. 1996, Kinematics Phys. Celest. Bodies, 12, 6, 54
Alikaeva, K.V., Chornogor, S.N. 2000, Kinematika i Fizika Nebesnykh Tel, 16, 6, 541
Alikaeva, K. V., Gandzha, S. I., Kondrashova, N. N., Polupan, P. N. 1980, Astrometriia i Astrofizika, 42, 3
Alikaeva, K.V., Kondrashova, N.N. 2006, Kinematika i Fizika Nebesnykh Tel, 22, 3, 163
Alikaeva, K.V., Kondrashova, N.N., Polupan, P.N., Redyuk, T.I. 1983, Publ. Debrecen Hel. Obs., 5, 177
Alikaeva, K.V., Kondrashova, N.N., Redyuk, T.I., Rudnikova, E.G. 1993, Kinematika i Fizika Nebesnykh Tel, 9, 1, 24
Alikaeva, K.V., Kondrashova, N.N., Redyuk, T.I., Rudnikova, E.G. 1993, Kinematics Phys. Celest. Bodies, 9, 2, 50
Alikaeva, K.V., Polupan, P.N., Gandzha, S.I., Kondrashova, N.N., Redyuk, T.I. 1985, Vestnik Kiev Univ., Seria Astronomii, 27, 3
Alikaeva, K.V., Polupan, P.N., Kondrashova, N.N., Redyuk, T.I. 1983, Vestnik Kiev Univ., Seria Astronomii, 25, 11
Andriiets, E.S., Kondrashova, N.N. 2014, Kinematics Phys. Celest. Bodies, 30, 1, 32
Andriets, E.S., Kondrashova, N.N. 2015, Advances in Space Research, 55, 3, 871
Andriiets, E.S., Kondrashova, N.N., Kurochka, E.V. 2014, Kinematics Phys. Celest. Bodies, 30, 2, 92
Andriets, E.S., Kondrashova, N.N., Kurochka, E.V., Lozitsky, V.G. 2012, Bull. Crimea Astrophys. Obs., 108, 1, 1
Baranovskij, E.A. 1984, Izv. Krymskoj Astrofiz. Obs., 69, 100
Baranovsky, E.A. 1993, Contrib. Astron. Obs. Skalnate Pleso, 23, 107
Baranovskij, E.A., Kondrashova, N.N., Pasechnik, M.N. 2000, Kinematika i Fizika Nebesnykh Tel, 16, 5, 387
Baranovsky, E.A., Kondrashova, N.N., Pasechnik, M.N., Tarashchuk, V.P. 2013, Kinematics Phys. Celest. Bodies, 29, 4, 167
Baranovsky, E.A., Kondrashova, N.N., Pasechnik, M.N., Tarashchuk, V.P. 2014, Kinematics Phys. Celest. Bodies, 30, 6, 268
Baranovskij, E.A., Lozitskaya, N.I., Lozitskij, V.G. 1991, Kinematics Phys. Celest. Bodies, 7, 3, 49
Baranovsky, E.A., Lozitsky, V.G., Tarashchuk, V.P. 2009, Kinematics Phys. Celest. Bodies, 25, 5, 373
Chae, J., Moon, Y.-J., Park, S.-Y. J. 2003, Korean Astron. Soc., 36, 13
Chornogor, S.N., Alikaeva, K.V. 2001, Kinematika i Fizika Nebesnykh Tel, 17, 2, 113
Chornogor, S.N., Alikaeva, K.V. 2003, Kinematika i Fizika Nebesnykh Tel, 19, 5, 417
Chornogor, S.N., Kondrashova, N.N. 2008, Solar Phys., 250, 303
Danilevsky, V.O., Eremin, S.S., Rozhilo, O.O. 1992, Vestnik Kiev Univ., Seria Astronomii, 6, 96
Devi, P., Joshi, B., Chandra, R., et al. 2020, Solar Phys., 295, 6, article id.75
Falchi, A., Qiu, J., Cauzzi, G. 1997, Astron. and Astrophys, 328, 1, 371
Fisher, G. H. 1989, Astrophys. J., 346, 2, 1019
Gadun, A.S. 1995, Kinematika i Fizika Nebesnykh Tel, 11, 3, 54
Gan, W.-Q., Fang, C. 1987, Solar Phys., 107, 2, 311
Gan, W. Q., Rieger, E., Fang, C. 1993, Astrophys. J., 416, 2, 886
Gurtovenko, E.A. 1968, Solar Phys., 4, 1, 108
Kondrashova, N.N. 1987, Vestnik. Kiev. Univ. Astron., 29, 27
Kondrashova, N.N. 1995, Kinematics Phys. Celest. Bodies, 11, 2, 33
Kondrashova, N.N., Pasechnik, M.N. 1997, Kinematics Phys. Celest. Bodies, 13, 4, 52
Kondrashova, N.N., Pasechnik, M.N. 1999, Kinematics Phys. Celest. Bodies, 15, 4, 237
Kondrashova, N.N., Pasechnik, M.N. 2010, Kinematics Phys. Celest. Bodies, 26, 1, 26
Kondrashova, N.N., Polupan, P.N. 1977, Vestnik Kiev. Univ., Seriya Astronomii, 19, 14
Kondrashova, N.N., Rudnikova, K.G. 2003, Kinematika i Fizika Nebesnykh Tel, 19, 2, 97
Kondrashova, N.N., Rudnikova, K.G., Pasechnik, M.N. 2001, Kinematika i Fizika Nebesnykh Tel, 17, 6, 485
Kosovichev, A.G., Zharkova, V.V. 1999, Solar Phys., 190, 1/2, 459
Kosovichev, A.G., Zharkova, V.V. 2001, Astrophys. J., 550, 1, L105
Kuckein, C., Collados, M., Manso Sainz, R. 2015, Astrophys. J. Letters, 799, 2, 5
Kuridze, D., Henriques, V., Mathioudakis, M., et al. 2017, Astrophys. J., 846, 1, 9
Kuridze, D., Henriques, V. M. J., Mathioudakis, M., L. et al. 2018, Astrophys. J., 860, 1, 10
Kurochka, E.V., Kurochka, L.N., Lozitskij, V.G., et al. 1980, Vestnik Kiev. Univ., Seriya Astronomii, 22, 48
Kurochka, E.V., Lozitsky, V.G. 2005, Kinematics Phys. Celest. Bodies, Suppl., 5, 143
Kurochka, E.V., Lozitsky, V.G., Osyka, O.B. 2008, Kinematics Phys. Celest. Bodies, 24, 4, 215
Leiko, U.M., Kondrashova, N.N. 2015, Advances in Space Research, 55, 3, 886
Leiko, U.M., Kondrashova, N.N. 2017, Kinematics Phys. Celest. Bodies, 33, 3, 111
Litvinenko, Yu.E. 1999, Astrophys. J., 515, 1, 435
Lozitsky, V.G., Baranovsky, E.A., Lozitska, N.I., Leiko, U.M. 2000, Solar Phys., 191, 171
Lozitsky, V.G., Baranovsky, E.A., Lozitska, N.I., Tarashchuk, V.P. 2018, Monthly Notices Royal Astronomical Society, 477, 2, 2796
Lozitsky, V.G., Baranovsky, E.A., Lozitska, N.I., Tarashchuk, V.P. 2019, Odessa Astron. Publications, 32, 125
Lozitsky, V.G., Staude, J. 2009, Journal of Astrophysics and Astronomy, 29, 387
Lozitsky, V., Stodilka, M. 2019, Bulletin of Taras Shevchenko National University of Kyiv, 59, 22
Lozitsky, V.G., Stodilka, M.I. 2021, Astrophysics and Space Science, 366, 3, article id.3
Machado, M. E., Avrett, E. H., Vernazza, J. E., Noyes, R. W. 1980, Astrophys. J., 242, 2, 336
Machado, M.E., Linsky, J.L. 1975, Solar Phys., 42, 2, 395
Meunier, N., Kosovichev, A. 2003, Astron. and Astrophys, 412, 541
Moon, Y.-J., Chae, J., Choe, G.S., et al. 2004, J. Korean Astron. Soc., 37, 1, 41
Nagai, F., Emslie, A.G. 1984, Astrophys.J., 279, 2, 896
Parusimov, V.G. 1981, Astrometriia i Astrofizika, 45, 86
Petrie, G.J.D., Sudol, J.J. 2010, Astrophys. J., 724, 2, 1218
Polupan, P.N. 1962, Publ. Kiev. astron. observ., 10, 59
Redyuk, T.I. 1983, Vestnik Kiev Univ., Seria Astronomii, 25, 26
Redyuk, T.I. 1990, Vestnik Kiev Univ., Seria Astronomii, 32, 28
Romanchuk, P.R. 1974, AO KHU. Yzd. Kyev. un-ta, 1
Ruiz Cobo, B., del Toro Iniesta, J.C. 1992, Astrophys. J. 398, 375
Sharykin, I.N., Sadykov, V.M., Kosovichev, A.G., et al. 2017, Astrophys. J., 840, 2, 13
Somov, B.V., Syrovatskii, S.I., Spector, A.R. 1981, Solar Phys., 73, 1, 145
Sudol, J.J., Harvey, J.W. 2005, Astrophys. J., 635, 1, 647
Vissers, G.J.M., Danilovic, S., de la Cruz Rodriguez, J., et al. 2021, Astron. and Astrophys, 645, 15
Wang, S., Liu, C., Liu, R., et al. 2012, Astrophys. J. Letters, 745, 2, article id. L17, 5
Wang, J., Zhao, M., Zhou, G. 2009, Astrophys. J., 690, 1, 862
Yadav, R., Díaz Baso, C.J., de la Cruz Rodríguez, J., et al. 2021, Astron. and Astrophys, 649, id.A106, 13