Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 20506 10.12737/stp-41201804 Results of current research Results of current research Results of current research Fe/O ratio behavior as an indicator of solar plasma state at different solar activity manifestations and in periods of their absence Fe/O ratio behavior as an indicator of solar plasma state at different solar activity manifestations and in periods of their absence Минасянц Геннадий Сергеевич Minasyants Gennady Sergeevich

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Минасянц Тамара Михайловна Minasyants Tamara Mihaylovna

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Томозов Владимир Михайлович Tomozov Vladimir Mihaylovich

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Астрофизический институт им. В.Г. Фесенкова НАН РК Алматы Казахстан Fesenkov Astrophysical Institute Almaty Kazakhstan Астрофизический институт им. В.Г. Фесенкова НАН РК Алматы Казахстан Fesenkov Astrophysical Institute Almaty Kazakhstan Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation 4 1 29 50 https://naukaru.ru/en/nauka/article/20506/view

We report the results of the investigation into plasma physical characteristics at various solar activity manifestations and in periods of their absence. These results have been obtained from quantitative estimates of the relative abundance of Fe/O ions in different energy ranges. Maximum values of the Fe/O ratio is shown to correspond to particle fluxes from impulsive flares for ions with energies <2 MeV/n (the most significant manifestation of the FIP effect). In particle fluxes from gradual flares, the Fe/O value decreases smoothly with ion energy and is noticeably inferior to values of fluxes in impulsive events. We have established that the properties of flares of solar cosmic rays indicate their belonging to a separate subclass in the total population of gradual events. Relying on variations in the abundance of Fe/O ions, we propose an xplanation of the solar plasma behavior during the development of flares of both classes. Magnetic clouds (a separate type of coronal mass ejections (CME)), which have regions of turbulent compression and are sources of strong geomagnetic storms, exhibit a relative composition of Fe ions comparable to the abundance of Fe in ion fluxes from gradual flares. We have found out that the Fe/O value can be used to detect penetration of energetic flare plasma into the CME body at the initial phase of their joint development and to estimate its relative contribution. During solar minimum with complete absence of sunspots, the Fe/O ratio during periods of “quiet” solar wind show absolutely low values of Fe/O=0.004–0.010 in the energy range from 2–5 to 30 MeV/n. This is associated with the manifestation of the cosmic ray anomalous component, which causes an increase in the intensity of ion fluxes with a high first ionization potential, including oxygen (O), and elements with a low first ionization potential (Fe) demonstrate weakening of the fluxes. As for particles with higher energies (Ek>30 MeV/n), the Fe/O increase is due to the decisive influence of galactic cosmic rays on the composition of impurity elements in the solar wind under solar minimum conditions. The relative content of heavy elements in galactic cosmic rays 30–500 MeV/n is similar to values in fluxes from gradual flares during high solar activity. During solar minimum without sunspots, the behavior of Fe/O for different ion energy ranges in plasma flows from coronal holes (CH) and in the solar wind exhibits only minor deviations. At the same time, plasma flows associated with the disturbed frontal CH region can be sources of moderate geomagnetic storms.

We report the results of the investigation into plasma physical characteristics at various solar activity manifestations and in periods of their absence. These results have been obtained from quantitative estimates of the relative abundance of Fe/O ions in different energy ranges. Maximum values of the Fe/O ratio is shown to correspond to particle fluxes from impulsive flares for ions with energies <2 MeV/n (the most significant manifestation of the FIP effect). In particle fluxes from gradual flares, the Fe/O value decreases smoothly with ion energy and is noticeably inferior to values of fluxes in impulsive events. We have established that the properties of flares of solar cosmic rays indicate their belonging to a separate subclass in the total population of gradual events. Relying on variations in the abundance of Fe/O ions, we propose an xplanation of the solar plasma behavior during the development of flares of both classes. Magnetic clouds (a separate type of coronal mass ejections (CME)), which have regions of turbulent compression and are sources of strong geomagnetic storms, exhibit a relative composition of Fe ions comparable to the abundance of Fe in ion fluxes from gradual flares. We have found out that the Fe/O value can be used to detect penetration of energetic flare plasma into the CME body at the initial phase of their joint development and to estimate its relative contribution. During solar minimum with complete absence of sunspots, the Fe/O ratio during periods of “quiet” solar wind show absolutely low values of Fe/O=0.004–0.010 in the energy range from 2–5 to 30 MeV/n. This is associated with the manifestation of the cosmic ray anomalous component, which causes an increase in the intensity of ion fluxes with a high first ionization potential, including oxygen (O), and elements with a low first ionization potential (Fe) demonstrate weakening of the fluxes. As for particles with higher energies (Ek>30 MeV/n), the Fe/O increase is due to the decisive influence of galactic cosmic rays on the composition of impurity elements in the solar wind under solar minimum conditions. The relative content of heavy elements in galactic cosmic rays 30–500 MeV/n is similar to values in fluxes from gradual flares during high solar activity. During solar minimum without sunspots, the behavior of Fe/O for different ion energy ranges in plasma flows from coronal holes (CH) and in the solar wind exhibits only minor deviations. At the same time, plasma flows associated with the disturbed frontal CH region can be sources of moderate geomagnetic storms.

 solar activity energy spectra FIP effect Fe/O ratio solar activity energy spectra FIP effect Fe/O ratio

Altyntsev A.T., Banin V.G., Kuklin G.V., Tomozov V.M. Solnechnye vspyshki [Solar Flares]. Moscow: Nauka Publ., 1982. 246 p. (In Russian). Altyntsev A.T., Banin V.G., Kuklin G.V., Tomozov V.M. Solnechnye vspyshki [Solar Flares]. Moscow: Nauka Publ., 1982. 246 p. (In Russian). Barkhatov N.A., Revunova E.A., Vinogradov A.B. Evolution of orientation of solar wind magnetic clouds, and manifestation of seasonal dependence in their geomagnetic activity. Vestnik Nizhegorodskogo universiteta imeni N.I. Lobachevskogo [Vestnik of Lobachevsky University of Nizhni Novgorod]. 2014, no. 4 (1), pp. 106-113. (In Russian). Barkhatov N.A., Revunova E.A., Vinogradov A.B. Evolution of orientation of solar wind magnetic clouds, and manifestation of seasonal dependence in their geomagnetic activity. Vestnik Nizhegorodskogo universiteta imeni N.I. Lobachevskogo [Vestnik of Lobachevsky University of Nizhni Novgorod]. 2014, no. 4 (1), pp. 106-113. (In Russian). Barkhatov N.A., Vinogradov A.B., Levitin A.E., Revu- nova E.A. Geomagnetic substorm activity associated with magnetic clouds. Geomagnetism and Aeronomy. 2015, vol. 55, no. 5, pp. 596-602. DOI: 10.1134/S0016793215050023. Barkhatov N.A., Vinogradov A.B., Levitin A.E., Revu- nova E.A. Geomagnetic substorm activity associated with magnetic clouds. Geomagnetism and Aeronomy. 2015, vol. 55, no. 5, pp. 596-602. DOI: 10.1134/S0016793215050023. Bazilevskaya G.A., Stozhkov Yu.I. Energichnye chastitsy i kosmicheskie luchi: galakticheskie, geliosfernye i solnechnye kosmicheskie luchi. Plazmennaya geliofizika [Energetic particles and cosmic rays: galactic, heliospheric and solar cosmic raya]. Eds. Zeleny L.M., Veselovsky I.S. V. 1. Moscow, 2008. P. 345-357. (In Russian). Bazilevskaya G.A., Stozhkov Yu.I. Energichnye chastitsy i kosmicheskie luchi: galakticheskie, geliosfernye i solnechnye kosmicheskie luchi. Plazmennaya geliofizika [Energetic particles and cosmic rays: galactic, heliospheric and solar cosmic raya]. Eds. Zeleny L.M., Veselovsky I.S. V. 1. Moscow, 2008. P. 345-357. (In Russian). Cliver E.W., Gopalswamy E., Webb D.F. History of research on solar energetic particle (SEP) events: The evolving paradigm. Proc. the 2008 IAU Symposium. No. 257. Universal Heliophysical Processes. 2009, pp. 401-412. Cliver E.W., Gopalswamy E., Webb D.F. History of research on solar energetic particle (SEP) events: The evolving paradigm. Proc. the 2008 IAU Symposium. No. 257. Universal Heliophysical Processes. 2009, pp. 401-412. Desai M. I., Mason G. M., Mazur J.E., Dwyer J.R. Solar cycle variations in the composition of the suprathermal heavy-ion population near 1 AU. Astrophys. J. 2006, vol. 645, pp. L81-L84. Desai M. I., Mason G. M., Mazur J.E., Dwyer J.R. Solar cycle variations in the composition of the suprathermal heavy-ion population near 1 AU. Astrophys. J. 2006, vol. 645, pp. L81-L84. Dierckxsens M., Tziotziou K., Dalla S., Patsou I., Marsh M.S., Crosby N.B., Malandraki O., Tsiropoula G. Relationship between solar energetic particles and properties of flares and CME: statistical analysis of solar cycle 23 events. Solar Phys. 2015, vol. 290, no. 3. pp. 841−874. DOI: 10.1007/s11207-014-0641-4. Dierckxsens M., Tziotziou K., Dalla S., Patsou I., Marsh M.S., Crosby N.B., Malandraki O., Tsiropoula G. Relationship between solar energetic particles and properties of flares and CME: statistical analysis of solar cycle 23 events. Solar Phys. 2015, vol. 290, no. 3. pp. 841−874. DOI: 10.1007/s11207-014-0641-4. Driel-Gesztelyi L. van, Culhane J.L. Magnetic flux emergence, activity, eruptions and magnetic clouds: following magnetic field from the Sun to the heliosphere. Space Sci. Rev. 2009, vol. 144, iss. 1, pp. 351-381. DOI: 10.1007/s11214-008-9461-x. Driel-Gesztelyi L. van, Culhane J.L. Magnetic flux emergence, activity, eruptions and magnetic clouds: following magnetic field from the Sun to the heliosphere. Space Sci. Rev. 2009, vol. 144, iss. 1, pp. 351-381. DOI: 10.1007/s11214-008-9461-x. Fisk L.A., Kozlovsky B., Ramaty R. An interpretation of the observed oxygen and nitrogen enhancement in low energy cosmic rays. Astrophys. J. Let. 1974, vol. 190, pp. 35-38. Fisk L.A., Kozlovsky B., Ramaty R. An interpretation of the observed oxygen and nitrogen enhancement in low energy cosmic rays. Astrophys. J. Let. 1974, vol. 190, pp. 35-38. Garrard T.L., Christian E.R., Mewaldt R.A., Ormes J.F., Stone E.C. The advanced composition explorer mission. Proc. 25th International Cosmic Ray Conference. Durban, South Africa, 30 July - 6 August, 1997. 1997, vol. 1, pp. 105-108. Garrard T.L., Christian E.R., Mewaldt R.A., Ormes J.F., Stone E.C. The advanced composition explorer mission. Proc. 25th International Cosmic Ray Conference. Durban, South Africa, 30 July - 6 August, 1997. 1997, vol. 1, pp. 105-108. Gonzalez W.D., Tsurutani B.T., Clua de Gonzalez A.L. Interplanetary origin of geomagnetic storms. Space Sci. Rev. 1999, vol. 88, pp. 529-562. DOI: 10.1023/A:1005160129098. Gonzalez W.D., Tsurutani B.T., Clua de Gonzalez A.L. Interplanetary origin of geomagnetic storms. Space Sci. Rev. 1999, vol. 88, pp. 529-562. DOI: 10.1023/A:1005160129098. Gosling J.T., Pizzo V.J. Formation and evolution of corotating interaction regions and their three-dimensional structure. Space Sci. Rev. 1999, vol. 89, pp. 21-52. DOI: 10.1023/A:1005291711900. Gosling J.T., Pizzo V.J. Formation and evolution of corotating interaction regions and their three-dimensional structure. Space Sci. Rev. 1999, vol. 89, pp. 21-52. DOI: 10.1023/A:1005291711900. Kahler S.W., Cliver E.W., Tylka A.J., Dietrich W.F. A comparison of ground level event e/p and Fe/O ratios with associated solar flare and CME characteristics. Space Sci. Rev. 2012. vol. 171, no. 1-4, pp. 121−139. DOI: 10.1007/s11214-011-9768-x. Kahler S.W., Cliver E.W., Tylka A.J., Dietrich W.F. A comparison of ground level event e/p and Fe/O ratios with associated solar flare and CME characteristics. Space Sci. Rev. 2012. vol. 171, no. 1-4, pp. 121−139. DOI: 10.1007/s11214-011-9768-x. Kallenrode M. B. Current views on impulsive and gradual solar energetic particle events. J. Phys. G: Nuclear and Particle Phys. 2003, vol. 29, pp. 965-981. DOI: 10.1088/0954-3899/29/5/316. Kallenrode M. B. Current views on impulsive and gradual solar energetic particle events. J. Phys. G: Nuclear and Particle Phys. 2003, vol. 29, pp. 965-981. DOI: 10.1088/0954-3899/29/5/316. Kasinsky V.V., Tomozov V.M. Comparison of X-ray coronal structures with dynamics and morphology of the photospheric activity. Astronomicheskii tsirkulyar [Astronomical Circular]. 1974, no. 806, pp. 1-3. (In Russian). Kasinsky V.V., Tomozov V.M. Comparison of X-ray coronal structures with dynamics and morphology of the photospheric activity. Astronomicheskii tsirkulyar [Astronomical Circular]. 1974, no. 806, pp. 1-3. (In Russian). Klecker B. Current understanding of SEP acceleration and propagation. J. Phys.: Conf. Ser. 2013, vol. 409, no. 1, pp. 1−15. DOI: 10.1088/1742-6596/409/1/012015. Klecker B. Current understanding of SEP acceleration and propagation. J. Phys.: Conf. Ser. 2013, vol. 409, no. 1, pp. 1−15. DOI: 10.1088/1742-6596/409/1/012015. Laming J.M. A unified picture of the first ionization potential and inverse first ionization potential effects. Astrophys. J. 2004, vol. 614, pp. 1063-1072. DOI: 10.1086/423780. Laming J.M. A unified picture of the first ionization potential and inverse first ionization potential effects. Astrophys. J. 2004, vol. 614, pp. 1063-1072. DOI: 10.1086/423780. Li G., Zank G.P. Mixed particle acceleration at CME-driven shocks and flares. Geophys. Res. Let. 2005, vol. 32, no. 2, pp. L02101. DOI: 10.1029/2004GL021250. Li G., Zank G.P. Mixed particle acceleration at CME-driven shocks and flares. Geophys. Res. Let. 2005, vol. 32, no. 2, pp. L02101. DOI: 10.1029/2004GL021250. Minasyants G.S., Minasyants T.M. Some peculiarities in dynamics of particle fluxes of solar cosmic rays. XVIII Vserossiskaya ezhegodnaya konferentsiya po fizike Solntsa “Solnechnaya I solnechno-zemnaya fizika - 2014” [Proc. XVIII National Conference on Solar Physics “Solar and Solar-Terrestrial Physics - 2014]. Saint Petersburg, Pulkovo Observatory, 2014, pp. 287−290. (In Russian). Minasyants G.S., Minasyants T.M. Some peculiarities in dynamics of particle fluxes of solar cosmic rays. XVIII Vserossiskaya ezhegodnaya konferentsiya po fizike Solntsa “Solnechnaya I solnechno-zemnaya fizika - 2014” [Proc. XVIII National Conference on Solar Physics “Solar and Solar-Terrestrial Physics - 2014]. Saint Petersburg, Pulkovo Observatory, 2014, pp. 287−290. (In Russian). Minasyants G.S., Minasyants T.M., Tomozov V.M. On some features in dynamics of energy spectra in flare fluxes of solar cosmic rays. Izvestiya Krymskoi astrofizicheskoi observatorii [Bull. of the Crimean Astrophysical Observatory]. 2016a, vol. 112, no.1, pp. 71-77. (In Russian). Minasyants G.S., Minasyants T.M., Tomozov V.M. On some features in dynamics of energy spectra in flare fluxes of solar cosmic rays. Izvestiya Krymskoi astrofizicheskoi observatorii [Bull. of the Crimean Astrophysical Observatory]. 2016a, vol. 112, no.1, pp. 71-77. (In Russian). Minasyants G.S., Minasyants T.M., Tomozov V.M. Variations of Fe/O ratio during the disturbed period of SCR flux development. Manifestation of FIP effect in SCR composition. Geomagnetizm i aeronomiya [Geomagnetism and Aeronomy] 2016b, vol. 56, no. 2, pp. 217-227. (In Russian). Minasyants G.S., Minasyants T.M., Tomozov V.M. Variations of Fe/O ratio during the disturbed period of SCR flux development. Manifestation of FIP effect in SCR composition. Geomagnetizm i aeronomiya [Geomagnetism and Aeronomy] 2016b, vol. 56, no. 2, pp. 217-227. (In Russian). Minasyants G.S., Minasyants T.M., Tomozov V.M. Dynamics of Fe/O ratio during variations of ion energy in fluxes of accelerated solar particles. Geomagnetizm i aeronomiya [Geomagnetism and Aeronomy]. 2016c, vol. 56, no. 6, pp. 690-699. (In Russian). Minasyants G.S., Minasyants T.M., Tomozov V.M. Dynamics of Fe/O ratio during variations of ion energy in fluxes of accelerated solar particles. Geomagnetizm i aeronomiya [Geomagnetism and Aeronomy]. 2016c, vol. 56, no. 6, pp. 690-699. (In Russian). Minasyants G.S., Minasyants T.M., Tomozov V.M. Fe/O ratio variations during the disturbed stage in the development of the solar cosmic ray fluxes. Manifestations of the first ionization potential effect in the solar cosmic ray composition. Geomagnetism and Aeronomy. 2016, vol. 56, no. 2, pp. 203-212. DOI: 10.1134/S0016793216020110. Minasyants G.S., Minasyants T.M., Tomozov V.M. Fe/O ratio variations during the disturbed stage in the development of the solar cosmic ray fluxes. Manifestations of the first ionization potential effect in the solar cosmic ray composition. Geomagnetism and Aeronomy. 2016, vol. 56, no. 2, pp. 203-212. DOI: 10.1134/S0016793216020110. Mordvinov A.V., Tomozov V.M., Fainshtein V.G. Effect of electron distribution function on dynamics of collisionless plasma expansion into background plasma of lower density. Prikladnaya mekhanika i tekhnicheskaya fizika [Applied Mechanics and Technical Physics]. 1985, no. 6, pp. 10-15. (In Russian). Mordvinov A.V., Tomozov V.M., Fainshtein V.G. Effect of electron distribution function on dynamics of collisionless plasma expansion into background plasma of lower density. Prikladnaya mekhanika i tekhnicheskaya fizika [Applied Mechanics and Technical Physics]. 1985, no. 6, pp. 10-15. (In Russian). Nitta N.V., Reames D.V., De Rosa M.L., Liu Y. Solar sources of impulsive solar energetic particle events and their magnetic field connection to the Earth. Astrophys. J. 2006, vol. 650, pp. 438-450. DOI: 10.1086/507442. Nitta N.V., Reames D.V., De Rosa M.L., Liu Y. Solar sources of impulsive solar energetic particle events and their magnetic field connection to the Earth. Astrophys. J. 2006, vol. 650, pp. 438-450. DOI: 10.1086/507442. Obridko V.N., Shelting B.D., Livshits I.M., Askerov A.B. Correlation between contrast of coronal holes and solar wind characteristics. Astronomicheskii zhurnal [Astron. J.] 2009, vol. 86, no. 11, pp. 1125-1132. (In Russian). Obridko V.N., Shelting B.D., Livshits I.M., Askerov A.B. Correlation between contrast of coronal holes and solar wind characteristics. Astronomicheskii zhurnal [Astron. J.] 2009, vol. 86, no. 11, pp. 1125-1132. (In Russian). Pallavicini R., Serio S., Vaiana G. A survey of soft X-ray limb flare images - The relation between their structure in the corona and other physical parameters. Astrophys. J. Part 1. 1977, vol. 216, pp. 108-122. Pallavicini R., Serio S., Vaiana G. A survey of soft X-ray limb flare images - The relation between their structure in the corona and other physical parameters. Astrophys. J. Part 1. 1977, vol. 216, pp. 108-122. Priest E.R., Forbes T. Magnitnoe peresoedinenie. Magnitogidrodinamicheskaya teoriya i prilozheniya [Magnetic reconnection. Magnetohydrodynamic theory and applications]. Moscow, Fizmatlit Publ., 2005. 591 p. (In Russian). Priest E.R., Forbes T. Magnitnoe peresoedinenie. Magnitogidrodinamicheskaya teoriya i prilozheniya [Magnetic reconnection. Magnetohydrodynamic theory and applications]. Moscow, Fizmatlit Publ., 2005. 591 p. (In Russian). Richardson I.G., Cane H.V. Near-Earth interplanetary coronal mass ejections during solar cycle 23 (1996-2009): Catalog and summary of properties. Solar Phys. 2010, vol. 264, pp. 189-237. DOI: 10.1007/s11207-010-9568-6. Richardson I.G., Cane H.V. Near-Earth interplanetary coronal mass ejections during solar cycle 23 (1996-2009): Catalog and summary of properties. Solar Phys. 2010, vol. 264, pp. 189-237. DOI: 10.1007/s11207-010-9568-6. Reames D.V., Meyer J.P., von Rosenvinge T.T. Energetic particle abundances in impulsive solar flare events. Astrophys. J. Suppl. Ser. 1994, vol. 90, pp. 649−667. Reames D.V., Meyer J.P., von Rosenvinge T.T. Energetic particle abundances in impulsive solar flare events. Astrophys. J. Suppl. Ser. 1994, vol. 90, pp. 649−667. Reames D.V. Solar energetic particles: A paradigm shift. Rev. Geophys. 1995, vol. 33, no. S1, pp. 585−589. DOI: 10.1029/95RG00188. Reames D.V. Solar energetic particles: A paradigm shift. Rev. Geophys. 1995, vol. 33, no. S1, pp. 585−589. DOI: 10.1029/95RG00188. Reames D.E. Energetic particles composition. Solar and galactic composition: A Joint SOHO/ACE Workshop. Bern, Switzerland, 6-9 March, 2001 (AIP Conf. Proc.) 2001, vol. 598, pp. 153-164. Reames D.E. Energetic particles composition. Solar and galactic composition: A Joint SOHO/ACE Workshop. Bern, Switzerland, 6-9 March, 2001 (AIP Conf. Proc.) 2001, vol. 598, pp. 153-164. Reames D.V., Ng C.K. Heavy-element abundances in solar energetic particle events. Astrophys. J. 2004, vol. 610, no. 1. pp. 510-522. DOI: 10.1086/421518. Reames D.V., Ng C.K. Heavy-element abundances in solar energetic particle events. Astrophys. J. 2004, vol. 610, no. 1. pp. 510-522. DOI: 10.1086/421518. Reames D.V. The two sources of solar energetic particles. Space Sci. Rev. 2013, vol. 175, no. 1, pp. 53−92. DOI: 10.1007/s11214-013-9958-9. Reames D.V. The two sources of solar energetic particles. Space Sci. Rev. 2013, vol. 175, no. 1, pp. 53−92. DOI: 10.1007/s11214-013-9958-9. Reames D.V. Element abundances in solar energetic particles and the solar corona. Solar Phys. 2014, vol. 289, no. 3. pp. 977−993. DOI: 10.1007/s11207-013-0350-4. Reames D.V. Element abundances in solar energetic particles and the solar corona. Solar Phys. 2014, vol. 289, no. 3. pp. 977−993. DOI: 10.1007/s11207-013-0350-4. Roth I., Temerin M. Selective ion acceleration in impulsive solar flares. Adv. Space Res. 1998, vol. 21, pp. 591-595. Roth I., Temerin M. Selective ion acceleration in impulsive solar flares. Adv. Space Res. 1998, vol. 21, pp. 591-595. Somov B.V. Plasma Astrophysics: Reconnection and Flares. Springer: New York. 2013. 504 p. DOI: 10.1016/S0273-1177(97)00968-X. Somov B.V. Plasma Astrophysics: Reconnection and Flares. Springer: New York. 2013. 504 p. DOI: 10.1016/S0273-1177(97)00968-X. Tomozov V.M. FIP effect as an indicator of dynamic processes in the solar atmosphere and interplanetary medium. Solnechno-zemnaya fizika [Solar-Terrestrial Physics]. 2012, iss. 19, pp. 19−35. (In Russian). Tomozov V.M. FIP effect as an indicator of dynamic processes in the solar atmosphere and interplanetary medium. Solnechno-zemnaya fizika [Solar-Terrestrial Physics]. 2012, iss. 19, pp. 19−35. (In Russian). Tomozov V.M. On some regularities in chemical composition distribution in stellar atmospheres. Solnechno-zemnaya fizika [Solar-Terrestrial Physics]. 2013, iss. 23, pp. 23−32. (In Russian). Tomozov V.M. On some regularities in chemical composition distribution in stellar atmospheres. Solnechno-zemnaya fizika [Solar-Terrestrial Physics]. 2013, iss. 23, pp. 23−32. (In Russian). Tomozov V.M., Strokin N.A. Comparative analysis of effectiveness of proton and electron acceleration in laboratory and solar plasma. Geomagnetizm i aeronomiya [Geomagnetism and Aeronomy]. 2015, vol. 55, no. 2, pp. 161−167. (In Russian). DOI: 10.7868/ S0016794015020169. Tomozov V.M., Strokin N.A. Comparative analysis of effectiveness of proton and electron acceleration in laboratory and solar plasma. Geomagnetizm i aeronomiya [Geomagnetism and Aeronomy]. 2015, vol. 55, no. 2, pp. 161−167. (In Russian). DOI: 10.7868/ S0016794015020169. Torsti J., Kocharov L., Innes D.E., Laivola J., Sahla T. Injection of energetic protons during solar eruption on 1999 May 9: Effect of flare and coronal mass ejection. Astron. Astrophys. 2001, vol. 365, pp. 198-203. DOI: 10.1051/0004-6361: 20000148. Torsti J., Kocharov L., Innes D.E., Laivola J., Sahla T. Injection of energetic protons during solar eruption on 1999 May 9: Effect of flare and coronal mass ejection. Astron. Astrophys. 2001, vol. 365, pp. 198-203. DOI: 10.1051/0004-6361: 20000148. Tylka A.J., Cohen C.M.S., Dietrich W.F., Lee M.A., Maclennan C.G., Mewaldt R.A., Ng C.K., Reames D.V. Shock geometry, seed populations and the origin of variable elemental composition at high energies in large gradual solar particle events. Astrophys. J. 2005, vol. 625, no. 1, pp. 474−495. DOI: 10.1086/429384. Tylka A.J., Cohen C.M.S., Dietrich W.F., Lee M.A., Maclennan C.G., Mewaldt R.A., Ng C.K., Reames D.V. Shock geometry, seed populations and the origin of variable elemental composition at high energies in large gradual solar particle events. Astrophys. J. 2005, vol. 625, no. 1, pp. 474−495. DOI: 10.1086/429384. Wang Y.-M, Pick M., Mason G.M. Сoronal holes, jets and the origin of 3He-rich particle events. Astrophys. J. 2006, vol. 639, no. 1, pp. 495-509. DOI: 10.1086/499355. Wang Y.-M, Pick M., Mason G.M. Coronal holes, jets and the origin of 3He-rich particle events. Astrophys. J. 2006, vol. 639, no. 1, pp. 495-509. DOI: 10.1086/499355. Yermolaev Yu.I., Yermolaev M.Yu. Solar and interplanetary sources of geomagnetic storms: space weather aspects. Geophys. Processes and Biosphere. 2009, vol. 8, no. 1, pp. 5-35. (In Russian). Yermolaev Yu.I., Yermolaev M.Yu. Solar and interplanetary sources of geomagnetic storms: space weather aspects. Geophys. Processes and Biosphere. 2009, vol. 8, no. 1, pp. 5-35. (In Russian). Yutian Chi, Chenglong Shen, Yuming Wang, Pinzhong Ye, Wang S. Statistical Study of the Interplanetary Coronal Mass Ejections from 1996 to 2014. arXiv: 1504.07849v1 [astro-ph.SR] 29 Apr 2015 P.1-9. Yutian Chi, Chenglong Shen, Yuming Wang, Pinzhong Ye, Wang S. Statistical Study of the Interplanetary Coronal Mass Ejections from 1996 to 2014. arXiv: 1504.07849v1 [astro-ph.SR] 29 Apr 2015 P.1-9. Zeldovich M.A., Ishkov V.N., Logachev Yu.I., Kechkemeti K. Ion composition of low-energy particle fluxes at 1 a.u. during quiet period of solar activity. 31 Vserossiiskaya konferentsiya po kosmicheskim lucham [31st National Conference on Cosmic Rays]. Moscow, MSU, 2010, pp. 1-7. (In Russian). Zeldovich M.A., Ishkov V.N., Logachev Yu.I., Kechkemeti K. Ion composition of low-energy particle fluxes at 1 a.u. during quiet period of solar activity. 31 Vserossiiskaya konferentsiya po kosmicheskim lucham [31st National Conference on Cosmic Rays]. Moscow, MSU, 2010, pp. 1-7. (In Russian). Zhang J., Dere K.P., Howard R.A., Kundu M.R., White S.M. On the temporal relationship between coronal mass ejections and flares. Astrophys. J. 2001, vol. 559, no. 1, pp. 452-462. DOI: 10.1086/322405. Zhang J., Dere K.P., Howard R.A., Kundu M.R., White S.M. On the temporal relationship between coronal mass ejections and flares. Astrophys. J. 2001, vol. 559, no. 1, pp. 452-462. DOI: 10.1086/322405. Zurbuchen T.H., Weberg M., von Steiger R., Mewaldt R.A., Lepri S.T., Antiochos S.K. Composition of coronal mass ejections. Astrophys. J. 2016, vol. 826, no. 10, 8 p. DOI: 10.3847/0004-637X/826/1/10. Zurbuchen T.H., Weberg M., von Steiger R., Mewaldt R.A., Lepri S.T., Antiochos S.K. Composition of coronal mass ejections. Astrophys. J. 2016, vol. 826, no. 10, 8 p. DOI: 10.3847/0004-637X/826/1/10. URL: https://omniweb.gsfc.nasa.gov/ftpbrowser/flux_spectr_m.html (accessed 18.10.2017). URL: https://omniweb.gsfc.nasa.gov/ftpbrowser/flux_spectr_m.html (accessed 18.10.2017). URL: http://www.srl.caltech.edu/sampex/Data-Center/DA-TA/EventSpectra (accessed 18.10.2017). URL: http://www.srl.caltech.edu/sampex/Data-Center/DA-TA/EventSpectra (accessed 18.10.2017). URL: https://wind.nasa.gov/fullcatalogue.php (accessed 18.10.2017). URL: https://wind.nasa.gov/fullcatalogue.php (accessed 18.10.2017).