Protons Acceleration in Solar Flares: The Results of the Analysis of Gamma-emission and Neutrons Recorded by the SONG Instrument Onboard the CORONAS-F Satellite

  • S. N. Kuznetsov
  • V. G. Kurt
  • B. Yu. YushkovEmail author
  • I. N. Myagkova
  • V. I. Galkin
  • K. Kudela
Part of the Astrophysics and Space Science Library book series (ASSL, volume 400)


The SONG instrument onboard CORONAS-F satellite was the only experiment which observed neutral emissions with energies > 20 MeV from solar flares during the 23rd solar activity cycle. High-energy gamma emission was measured by SONG during four major flares, namely: August 25, 2001, October 28, 2003, November 04, 2003, and January 20, 2005. Spectra of this emission were restored in the energy range of 0.05–300 MeV and a broad line at energy range 40–100 MeV produced through π 0-decay was distinguished. Generation of this line is a direct indication of the appearance of protons accelerated to energies above 300 MeV in the flare volume. In this way we determined the onset of high-energy proton acceleration. The same protons produce simultaneously high-energy neutrons which can leave the Sun. These neutrons were recorded by the SONG instrument after the flares of August 25, 2001, October 28, 2003, and November 04, 2003. Comparison of protons acceleration time during the October 28, 2003 and January 20, 2005 flares with the onset time of Ground Level Enhancement (GLE) leads to a conclusion that protons responsible for the GLE onset escaped from the solar atmosphere without any delay after their acceleration. The obtained results allow one to understand in a new way a process of particle acceleration up to relativistic energy during flare development.


Count Rate Solar Flare Interplanetary Magnetic Field Solar Atmosphere Radiation Belt 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    Vilmer, N., MacKinnon, A.L., Hurford, G.J.: Properties of energetic ions in the solar atmosphere from gamma-ray and neutron observations. Space Sci. Rev. 159, 167 (2011)ADSCrossRefGoogle Scholar
  2. 2.
    Miroshnichenko, L.I., Gan, W.Q.: Particle acceleration and gamma rays in solar flares: Recent observations and new modeling. Adv. Space Res. 50, 736 (2012)ADSCrossRefGoogle Scholar
  3. 3.
    Share, G.H., Murphy, R.J.: Accelerated and ambient He abundances from gamma-ray line measurements of flares. Astrophys. J. 508, 876 (1998)ADSCrossRefGoogle Scholar
  4. 4.
    Ramaty, R., Kozlovsky, B., Lingenfelter, R.E.: Solar gamma rays. Space Sci. Rev. 18, 341 (1975)ADSCrossRefGoogle Scholar
  5. 5.
    Chupp, E.L., Forrest, D.J., Ryan, J.M. et al.: A direct observation of solar neutrons following the 01:18 UT flare on 1980 June 21. Astrophys. J. 263, L95 (1982).ADSCrossRefGoogle Scholar
  6. 6.
    Chupp, E.L., Debrunner, H., Flückiger, E. et al.: Solar neutron emissivity during the large flare on 1982 June 3. Astrophys. J. 318, 913 (1987)ADSCrossRefGoogle Scholar
  7. 7.
    Debrunner, H. et al.: The solar cosmic ray neutron event on June 3, 1982. Proceedings of the 18th ICRC, vol. 4, p. 75, Bangalore (1983)Google Scholar
  8. 8.
    Watanabe, K. et al.: Solar neutron event in association with a large solar flare on August 25, 2001. Proceedings of the 28th ICRC, p. 3179, Tsukuba (2003)Google Scholar
  9. 9.
    Watanabe, K., Muraki, Y., Matsubara, Y. et al.: Solar neutron events associated with large solar flares in solar cycle. Fall Meeting 2005. AGU. SH13A-0292.Google Scholar
  10. 10.
    Watanabe, K., Gros, M., Stoker, P.H. et al.: Solar neutron events of 2003 October–November. Astrophys. J. 636, 1135 (2006)ADSCrossRefGoogle Scholar
  11. 11.
    Sako, T., Watanabe, K., Muraki, Y. et al.: Long-lived solar neutron emission in comparison with electron-produced radiation in the 2005 September 7 solar flare. Astrophys. J. 661, L69 (2006)ADSCrossRefGoogle Scholar
  12. 12.
    Ramaty, R., Murphy, R.J.: Nuclear processes and accelerated particles in solar flares. Space Sci. Rev. 45, 213 (1987)ADSCrossRefGoogle Scholar
  13. 13.
    Murphy, R.J., Dermer, C.D., Ramaty, R.: High-energy processes in solar flares. Astrophys. J. Suppl. 63, 721 (1987)ADSCrossRefGoogle Scholar
  14. 14.
    Mandzhavidze, N., Ramaty, R.: Gamma rays from pion decay: evidence for long-term trapping of particles in solar flares. Astrophys. J. 396, L111 (1992)ADSCrossRefGoogle Scholar
  15. 15.
    Lingenfelter, R.: Solar flare neutrons and gamma rays. High Energy Solar Phenomena / Eds. Ryan J.M., Vestrand W. T. AIP, NY AIP. 1994, P. 77Google Scholar
  16. 16.
    Akimov, V.V., Leikov, N.G., Kurt, V.G., Chertok, I.M.: The GAMMA-1 data on the March 26, 1991 solar flare // ibid, P. 130Google Scholar
  17. 17.
    Rieger, E.: Solar flares: high-energy radiation and particles. Sol. Phys. 121, 323 (1989)ADSCrossRefGoogle Scholar
  18. 18.
    Kuznetsov, S.N., Kurt, V.G., Yushkov, B.Yu., Kudela, K.: CORONAS-F satellite data on the delay between the proton acceleration on the Sun and their detection at 1 AU. Proceedings of 30th ICRC, vol. 1, p. 121, Merida (2008)Google Scholar
  19. 19.
    Kuznetsov, S.N., Kurt, V.G., Yushkov, B.Yu., Kudela, K., Galkin, V.I.: Gamma-Ray and High-Energy-Neutron Measurements on CORONAS-F during the Solar Flare of 28 October 2003. Sol. Phys. 268, 175 (2011)ADSCrossRefGoogle Scholar
  20. 20.
    Forrest, D.J., Vestrand, W.T., Chupp, E.L. et al.: Very energetic gamma-rays from the June 3, 1982 solar flare. Adv. Space Res. 6, 115 (1986)ADSCrossRefGoogle Scholar
  21. 21.
    Alexander, D., Dunphy, P.P., MacKinnon, A.L.: High energy gamma-ray emission from solar flares: constraining the accelerated proton spectrum. Sol. Phys. 151, 147 (1994)ADSCrossRefGoogle Scholar
  22. 22.
    Talon, R., Trottet, G., Vilmer, N. et al.: Hard X-ray and?-ray observations of solar flares with the Phebus experiment. Sol. Phys. 147, 137 (1993)ADSCrossRefGoogle Scholar
  23. 23.
    Terekhov, O.V., Sunyaev, R.A., Tkachenko, A.Yu. et al.: Deuterium synthesis during the solar flare of March 22, 1991 (Granat data). Astron. Lett. 22, 143 (1996)ADSGoogle Scholar
  24. 24.
    Dunphy, P.P., Chupp, E.L., Bertsch, D.L. et al.: Gamma-rays and neutrons as a probe of flare proton spectra: the solar flare of 11 June 1991. Sol. Phys. 187, 45 (1999)ADSGoogle Scholar
  25. 25.
    Akimov, V.V., Ambroz, P., Belov, A.V. et al.: Evidence for prolonged acceleration based on a detailed analysis of the long-duration solar gamma-ray flare of June 15, 1991. Sol. Phys. 166, 107 (1996)ADSCrossRefGoogle Scholar
  26. 26.
    Chupp, E.L., Trottet, G., Dunphy, P.P., Rieger, E.: What we know and what we do not know about high energy neutral emissions from solar flares (a challenge for future missions). Proceedings of 28th ICRC, p. 3171, Tsukuba (2003)Google Scholar
  27. 27.
    Chupp, E.L., Ryan, J.M.: High energy neutron and pion-decay gamma-ray emissions from solar flares. Res. Astron. Astrophys. 9, 11 (2009)ADSCrossRefGoogle Scholar
  28. 28.
    Ackermann, M., Ajello, M., Allafort, A. et al. FERMI detection of?-ray emission from the M2 soft X-ray flare on 2010 June 12. Astrophys. J. 745, 144 (2012)ADSCrossRefGoogle Scholar
  29. 29.
    Kuznetsov, S.N., Kurt, V.G., Myagkova, I.N. et al.: Gamma-ray emission and neutrons from solar flares recorded by the SONG instrument in 2001–2004. Sol. Syst. Res. 40, 104 (2006)ADSCrossRefGoogle Scholar
  30. 30.
    Kurt, V.G., Yushkov, B.Yu., Kudela, K., Galkin, V.I.: High-energy gamma radiation of solar flares as an indicator of acceleration or energetic protons. Cosmic Res. 48, 70 (2010)ADSCrossRefGoogle Scholar
  31. 31.
    Kurt, V.G., Kudela, K., Yushkov, B.Yu., Galkin, V.I.: On the Onset Time of Several SPE/GLE Events: Indications from High-Energy Gamma-Ray and Neutron Measurements by CORONAS-F. Adv. Astron. 2013. Paper 690921 (2013)Google Scholar
  32. 32.
    Kuznetsov, S.N., Bogomolov, A.V., Gordeev, Yu.P. et al.: Preliminary results of the experiment with the SCR scientific set of instruments onboard the CORONAS-I satellite. Bull. Russ. Acad. Sci. Phys. 59(4), 2 (1995)Google Scholar
  33. 33.
    Veselovsky, I.S., Panasyuk, M.I., Avdyusin, S.I. et al.: Solar and Heliospheric Phenomena in October-November 2003: Causes and Effects. Cosmic Res. 42, 438 (2004)ADSGoogle Scholar
  34. 34.
    Grechnev, V.V., Kurt, V.G., Chertok, I.M. et al.: An extreme solar event of 20 January 2005: properties of the flare and origin of energetic particles. Sol. Phys. 252, 149 (2008)ADSCrossRefGoogle Scholar
  35. 35.
    Kuznetsov, S.N., Kurt, V.G., Yushkov, B.Yu. et al.: 28 October 2003 flare: high-energy gamma emission, type II radio emission and solar particle observations. Int. J. Mod. Phys. A. 20, 6705 (2005).ADSCrossRefGoogle Scholar
  36. 36.
    Kuznetsov, S.N., Kurt, V.G., Yushkov, B.Yu. et al.: Proton acceleration during 20 January 2005 solar flare: CORONAS-F observations of high-energy gamma emission and GLE. Contrib. Astron. Obs. Skalnate Pleso 36, 85 (2006)ADSGoogle Scholar
  37. 37.
    Gros, M., Tatischeff, V., Kiener, J. et al.: INTEGRAL/SPI observation of the 2003 October 28 solar flare // Proc. 5th INTEGRAL Workshop / Eds. Schonfelder V., Lichti G., Winkler C. 2004. ESA SP-552, P. 669Google Scholar
  38. 38.
    Share, G.H., Murphy, R.J., Smith, D.M. et al.: RHESSI \({e}^{+} - {e}^{-}\) annihilation radiation observations: implications for conditions in the flaring solar chromosphere. Astrophys. J. 615, L169 (2004)ADSCrossRefGoogle Scholar
  39. 39.
    Masson, S., Klein, K.-L., Butikofer, R., Flückiger, E., Kurt, V., Yushkov, B., Kruker, S.: Acceleration of Relativistic Protons During the 20 January 2005 Flare and CME. Sol. Phys. 257, 305 (2009)ADSCrossRefGoogle Scholar
  40. 40.
    Zhitnik, I.A., Logachev, Yu.I., Bogomolov, A.V. et al.: Polarization, temporal, and spectral parameters of solar flare hard X-rays as measured by the SPR-N instrument onboard the CORONAS-F satellite. Sol. Syst. Res. 40, 93 (2006)ADSCrossRefGoogle Scholar
  41. 41.
    Kiplinger, A., Garcia, H.: Soft X-ray parameters of the great flares of active region 486. Bull. Am. Astron. Soc. 36, 739 (2004)ADSGoogle Scholar
  42. 42.
    Kaufmann, P., Raulin, J.-P., Giménez de Castro C.G. et al.: A new solar burst spectral component emitting only in the terahertz range. Astrophys. J. 603, L121 (2004)Google Scholar
  43. 43.
    Kane, S.R., McTiernan, J.M., Hurley, K.: Multispacecraft observations of the hard X-ray emission from the giant solar flare on 2003 November 4. Astron. Astrophys. 433, 1133 (2005)ADSCrossRefGoogle Scholar
  44. 44.
    Bouratzis, C., Preka-Papadema, P., Hillaris, A. et al.: Radio observations of the 20 January 2005 X-class flare. Sol. Phys. 267, 343 (2010)ADSCrossRefGoogle Scholar
  45. 45.
    Share, G.H. et al.: RHESSI spectroscopic observations of the 2005 January 20 solar flare. SPD Meeting. American Astron. Soc. 2006, P. 37Google Scholar
  46. 46.
    Kuznetsov, S.N., Kurt, V.G., Yushkov, B.Yu., Kudela, K.: Determination of instants of the particle acceleration up to relativistic energies in solar flares according to the SONG measurements onboard the CORONAS-F satellite. Bull. Russ. Acad. Sci. Phys. 70, 1665 (2006)Google Scholar
  47. 47.
    Plainaki, C., Belov, A., Eroshenko, E., Kurt, V. et al.: Unexpected burst of solar activity recorded by neutron monitors during October November 2003. Adv. Space Res. 35, 691 (2005)ADSCrossRefGoogle Scholar
  48. 48.
    Pei, C., Jokipii, J.R., Giacalone, J.: Effect of a random magnetic field on the onset times of solar particle events. Astrophys. J. 641, 1222 (2009)ADSCrossRefGoogle Scholar
  49. 49.
    Panasyuk, M.I. et al.: Modeling of Neutron Fluxes on Near-Earth Spacecrafts from Experimental Results of SINP. Proceedings of RADECS 2000 Workshop, P. 9. Université Catholique de Louvain, Belgium (2001)Google Scholar
  50. 50.
    Bieber, J.W., Clem, J., Evenson, P. et al.: Relativistic solar neutrons and protons on 28 October 2003. Geophys. Res. Lett. 32, L03S02 (2005)Google Scholar
  51. 51.
    Miroshnichenko, L.I., Klein, K.-L., Trottet, G. et al.: Relativistic nucleon and electron production in the 2003 October 28 solar event. J. Geophys. Res. 110, A09S08 (2005)Google Scholar
  52. 52.
    Miklenic, C.H., Veronig, A.M., Vršnak, B.: Magnetic flux change rates and nonthermal flare emission. Astron. Astrophys. 499, 893 (2009)ADSCrossRefGoogle Scholar
  53. 53.
    Kiener, J., Gros, M., Tatischeff, V., Weidenspointner, G.: Properties of the energetic particle distributions during the October 28, 2003 solar flare from INTEGRAL/SPI observations. Astron. Astrophys. 445, 725 (2006)ADSCrossRefGoogle Scholar
  54. 54.
    Kuznetsov, S.N., Yushkov, B.Yu, Kudela, K.: Measurement of the spectrum of relativistic protons from solar flares on October 28 and November 2, 2003 onboard the CORONAS-F satellite. Cosmic Res. 45, 373 (2007)Google Scholar
  55. 55.
    Kurt, V.G., Yushkov, B.Yu., Belov, A.V.: On the ground level enhancement beginning. Astron. Lett. 36, 520 (2010)ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • S. N. Kuznetsov
    • 1
  • V. G. Kurt
    • 1
  • B. Yu. Yushkov
    • 1
    Email author
  • I. N. Myagkova
    • 1
  • V. I. Galkin
    • 1
  • K. Kudela
    • 2
  1. 1.D. V. Skobeltsyn Institute of Nuclear PhysicsM. V. Lomonosov Moscow State University (SINP MSU)MoscowRussia
  2. 2.Institute of Experimental PhysicsSlovak Academy of Sciences (IEP SAS)KosiceSlovakia

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