Abstract
I ±V profiles of the Fei 5247 and 5250 lines in the 2B flare of June 16, 1989 have been analyzed. A bright knot of the flare outside the sunspot where the central intensity of Hα reached a peak value of 1.4 (relative to the continuum) has been explored. The Fei 5250/Fei 5247 magnetic line ratio based on the StokesV peak separations of these lines at five evolutionary phases of the flare (including the start of the flare, the flash phase, the peak and 16 min after the peak) has been analyzed. It was found that the StokesV peak separation for the Fei 5250 line was systematically larger than that of the Fei 5247 line. This is evidence for the presence in the flare of small-scale flux tubes with kG fields. The flux tube magnetic field strength was about 1.1 kG at the start of the flare and during the flash phase, 1.55 kG during the peak, and 1.38 kG 16 min after the peak. The filling factor,α, appears to decrease monotonically during the flare.
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Abdusamatov, X. I.: 1971,Soln. Dannye No. 9, 67.
Babcock, H. W.: 1953,Astrophys. J. 118, 387.
Baranovskij, E. A., Lozitskaya, N. I., and Lozitskij, V. G.: 1991,Kinematika i Fizika Neb. Tel 7, 52.
Brault, J. W.: 1978, in G. Godoli, G. Noci, and A. Righini (eds.), ‘Proc. JOSO Workshop “Future Solar Optical Observations - Needs and Constraints”’,Osserv. Mem. Oss. Astrofis. Arcetri 106, 33.
Delbouille, L., Roland, J., and Neven, L.: 1973,Photometric Atlas of Solar Spectrum from λ3000 to 10000, Cointe-Ougrée, p. 135.
Deming, D., Hewagama, T., Jennings, D. E., Osherovich, V., Wiedemann, G., and Zirin, H.: 1990,Astrophys. J. 364, L49.
Frazier, E. N. and Stenflo, J. O.: 1978,Astron. Astrophys. 70, 789.
Gurtovenko, E. A.: 1966,Astron. J. (Soviet) 43, 659.
Harvey, J. and Livingston, W.: 1969,Solar Phys. 10, 283.
Heyvaerts, J., Priest, E. R., and Rust, D. M.: 1977,Astrophys. J. 216, 123.
Hood, A. W. and Priest, E. R.: 1980,Solar Phys. 66, 113.
Howard, R. and Stenflo, J. O.: 1972,Solar Phys. 22, 402.
Koval', A. N.: 1974,Izv. Krymsk. Astrofiz. Obs. 52, 100.
Koval', A. N. and Stepanyan, N. N.: 1983,Izv. Krymsk. Astrofiz. Obs. 68, 3.
Kurochka, E. V., Kurochka, L. N., Lozitskij, V. G., Lozitskaya, N. I., Ostapenko, V. A., Polupan, P. N., Romanchuk, P. R., and Rossada, V. M.: 1980,Vestnik Kiev Univ. 22, 48.
Kurochka, L. N., Lozitskij, V. G., and Paluš, P.: 1987,Kinematika i Fizika Neb. Tel 3, 46.
Lozitskaya, N. I. and Lozitskij, V. G.: 1982a,Soviet Astron. Letters 8(4), 270.
Lozitskaya, N. I. and Lozitskij, V. G.: 1982b,Vestnik Kiev Univ. 24, 41.
Lozitskaya, N. I. and Lozitskij, V. G.: 1988,Proc. Int. Workshop ‘Solar Maximum Analysis’, Irkutsk, p. 80.
Lozitskaya, N. I., Lozitskij, V. G., Romanchuk, P. R., and Krivodubskij, V. N.: 1982, ‘Solar and Stellar Magnetic Fields: Origins and Coronal Effects’,IAU Symp. 102, 13.
Lozitskij, V. G.: 1986,Kinematic Phys. Celest. Bodies 2, 30.
Lozitskij, V. G.: 1989,Issled. Soln. Plasmy, Ashchabad, Ilim, p. 35.
Mayfield, E. B. and Chapman, G. A.: 1981,Solar Phys. 70, 351.
Mogilevskij, E. I.: 1980,Fizika Soln. Aktivnosti, Nauka, Moscow, p. 3.
Moore, R., Hurford, G. J., Jones, H. P., and Kane, S. R.: 1984,Astrophys. J. 276, 379.
Ribes, E.: 1969,Astron. Astrophys. 2, 316.
Rust, D. M.: 1973,Solar Phys. 33, 205.
Rust, D. M.: 1976,Solar Phys. 47, 21.
Severny, A. B.: 1960,Izv. Krymsk. Astrofiz. Obs. 22, 12.
Soloviev, A. A. and Lozitskij, V. G.: 1986,Kinematics Phys Celest. Bodies 2, 95.
Somov, B. V. and Syrovatskij, S. J.: 1979,Issled. Geomagn. Aeronomii i Fiz. Solnca 48, 123.
Stenflo, J. O.: 1973,Solar Phys. 32, 41.
Stenflo, J. O.: 1992,Proc. OSL Workshop, Capri, Italy, May 27–31, 1991.
Stenflo, J. O., Solanki, S. K., and Harvey, J. W.: 1987,Astron. Astrophys. 171, 305.
Švestka, Z.: 1976,Solar Flares, D. Reidel Publ. Co., Dordrecht, Holland, p. 5380.
Unno, W.: 1956,Publ. Astron. Soc. Japan 8, 108.
Venglinskij, E. R., Gladushina, N. A., Lejko, U. M., Lozitskij, V. G., and Tsap, T. T.: 1990,Issled. po Fizike Solnca, Ashchabad, AN TSSR, p. 101.
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Lozitska, N., Lozitskij, V. Small-scale magnetic flux tube diagnostics in a solar flare. Sol Phys 151, 319–331 (1994). https://doi.org/10.1007/BF00679078
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DOI: https://doi.org/10.1007/BF00679078