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Impulsive SEP Events

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Solar Energetic Particles

Part of the book series: Lecture Notes in Physics ((LNP,volume 932))

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Abstract

3He-rich, Fe-rich, and rich in elements with Z > 50, the abundances of solar energetic particles (SEPs) from the small impulsive SEP events stand out as luminaries of our study. Element abundance enhancements increase 1000-fold as the ~3.6 power of the mass-to-charge ratio A/Q from He to Pb, enhanced during acceleration in islands of magnetic reconnection. Their pattern of enhancements suggest a source with C and N fully ionized like He, Ne enhanced more than Mg and Si, and heavy elements following the power-law enhancement versus A/Q with Q at a source temperature of 2.5–3.2 MK. These temperatures are typical of solar active regions from which these impulsive SEPs come. However, in a few events, the element S is greatly enhanced, apparently by the same resonant-wave mechanism that enhances 3He. Which mechanism will dominate? Impulsive SEP events are associated with slow, narrow CMEs, and solar jets where magnetic reconnection on open field lines gives particles direct access to space.

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References

  • Arnaud, M., Raymond, J.: Iron ionization and recombination rates and ionization equilibrium. Astrophys. J. 398, 394 (1992)

    Article  ADS  Google Scholar 

  • Arnaud, M., Rothenflug, R.: An updated evaluation of recombination and ionization rates. Astron. Astrophys. Suppl. 60, 425 (1985)

    ADS  Google Scholar 

  • Chupp, E.L.: High-energy neutral radiations from the sun. Annu. Rev. Astron. Astrophys. 22, 359 (1984)

    Article  ADS  Google Scholar 

  • Chupp, E.L., Forrest, D.J., Ryan, J.M., Heslin, J., Reppin, C., Pinkau, K., Kanbach, G., Rieger, E., Share, G.H.: A direct observation of solar neutrons following the 0118 UT flare on 1980 June 21. Astrophys. J. Lett. 263, L95 (1982)

    Article  ADS  Google Scholar 

  • Cook, W.R., Stone, E.C., Vogt, R.E.: Elemental composition of solar energetic particles. Astrophys. J. 279, 827 (1984)

    Article  ADS  Google Scholar 

  • Drake, J.F., Swisdak, M.: Ion heating and acceleration during magnetic reconnection relevant to the corona. Space Sci. Rev. 172, 227 (2012)

    Article  ADS  Google Scholar 

  • Drake, J.F., Cassak, P.A., Shay, M.A., Swisdak, M., Quataert, E.: A magnetic reconnection mechanism for ion acceleration and abundance enhancements in impulsive flares. Astrophys. J. Lett. 700, L16 (2009)

    Article  ADS  Google Scholar 

  • Evenson, P., Meyer, P., Pyle, K.R.: Protons from the decay of solar flare neutrons. Astrophys. J. 274, 875 (1983)

    Article  ADS  Google Scholar 

  • Evenson, P., Kroeger, R., Meyer, P., Reames, D.: Solar neutron decay proton observations in cycle 21. Astrophys. J. Suppl. 73, 273 (1990)

    Article  ADS  Google Scholar 

  • Fisk, L.A.: 3He-rich flares—a possible explanation. Astrophys. J. 224, 1048 (1978)

    Article  ADS  Google Scholar 

  • Kahler, S.W., Reames, D.V., Sheeley Jr., N.R.: Coronal mass ejections associated with impulsive solar energetic particle events. Astrophys. J. 562, 558 (2001)

    Article  ADS  Google Scholar 

  • Knizhnik, K., Swisdak, M., Drake, J.F.: The acceleration of ions in solar flares during magnetic reconnection. Astrophys. J. Lett. 743, L35 (2011)

    Article  ADS  Google Scholar 

  • Lee, E.J., Archontis, V., Hood, A.W.: Helical blowout jets in the sun: untwisting and propagation of waves. Astrophys. J. Lett. 798, L10 (2015)

    Article  ADS  Google Scholar 

  • Liu, S., Petrosian, V., Mason, G.M.: Stochastic acceleration of 3He and 4He in solar flares by parallel-propagating plasma waves: general results. Astrophys. J. 636, 462 (2006)

    Article  ADS  Google Scholar 

  • Mandzhavidze, N., Ramaty, R., Kozlovsky, B.: Determination of the abundances of subcoronal 4He and of solar flare-accelerated 3He and 4He from gamma-ray spectroscopy. Astrophys. J. 518, 918 (1999)

    Article  ADS  Google Scholar 

  • Mason, G.M.: 3He-rich solar energetic particle events. Space Sci. Rev. 130, 231 (2007)

    Article  ADS  Google Scholar 

  • Mason, G.M., Reames, D.V., Klecker, B., Hovestadt, D., von Rosenvinge, T.T.: The heavy-ion compositional signature in He-3-rich solar particle events. Astrophys. J. 303, 849 (1986)

    Article  ADS  Google Scholar 

  • Mason, G.M., Mazur, J.E., Dwyer, J.R.: A new heavy ion abundance enrichment pattern in 3He-rich solar particle events. Astrophys. J. Lett. 565, L51 (2002)

    Article  ADS  Google Scholar 

  • Mason, G.M., Mazur, J.E., Dwyer, J.R., Jokippi, J.R., Gold, R.E., Krimigis, S.M.: Abundances of heavy and ultraheavy ions in 3He-rich solar flares. Astrophys. J. 606, 555 (2004)

    Article  ADS  Google Scholar 

  • Mason, G.M., Nitta, N.V., Wiedenbeck, M.E., Innes, D.E.: Evidence for a common acceleration mechanism for enrichments of 3He and heavy ions in impulsive SEP events. Astrophys. J. 823, 138 (2016)

    Article  ADS  Google Scholar 

  • Miller, J.A.: Particle acceleration in impulsive solar flares. Space Sci. Rev. 86, 79 (1998)

    Article  ADS  Google Scholar 

  • Miller, J.A., Cargill, P.J., Emslie, A.G., Holman, G.D., Dennis, B.R., LaRosa, T.N., Winglee, R.M., Benka, S.G., Tsuneta, S.: Critical issues for understanding particle acceleration in impulsive solar flares. J. Geophys. Res. 102, 14631 (1997)

    Article  ADS  Google Scholar 

  • Moore, R.L., Sterling, A.C., Falconer, D.A., Robe, D.: The cool component and the dichotomy, lateral expansion, and axial rotation of solar X-ray jets. Astrophys. J. 769, 134 (2013)

    Article  ADS  Google Scholar 

  • Murphy, R.J., Ramaty, R., Kozlovsky, B., Reames, D.V.: Solar abundances from gamma-ray spectroscopy: comparisons with energetic particle, photospheric, and coronal abundances. Astrophys. J. 371, 793 (1991)

    Article  ADS  Google Scholar 

  • Nitta, N.V., Reames, D.V., DeRosa, M.L., Yashiro, S., Gopalswamy, N.: Solar sources of impulsive solar energetic particle events and their magnetic field connection to the Earth. Astrophys. J. 650, 438 (2006)

    Article  ADS  Google Scholar 

  • Post, D.E., Jensen, R.V., Tarter, C.B., Grasberger, W.H., Lokke, W.A.: Steady-state radiative cooling rates for low-density, high temperature plasmas. At. Data Nucl. Data Tables. 20, 397 (1977)

    Article  ADS  Google Scholar 

  • Ramaty, R., Murphy, R.J.: Nuclear processes and accelerated particles in solar flares. Space Sci. Rev. 45, 213 (1987)

    Article  ADS  Google Scholar 

  • Raouafi, N.E., Patsourakos, S., Pariat, E., Young, P.R., Sterling, A.C., Savcheva, A., Shimojo, M., Moreno-Insertis, F., DeVore, C.R., Archontis, V., et al.: Solar coronal jets: observations, theory, and modeling. Space Sci. Rev. Online (2016). doi:10.1007/s11214-016-0260-5 (arXiv:1607.02108)

  • Reames, D.V.: Bimodal abundances in the energetic particles of solar and interplanetary origin. Astrophys. J. Lett. 330, L71 (1988)

    Article  ADS  Google Scholar 

  • Reames, D.V.: Coronal abundances determined from energetic particles. Adv. Space Res. 15(7), 41 (1995)

    Article  ADS  Google Scholar 

  • Reames, D.V.: Particle acceleration at the Sun and in the Heliosphere. Space Sci. Rev. 90, 413 (1999)

    Article  ADS  Google Scholar 

  • Reames, D.V.: Abundances of trans-iron elements in solar energetic particle events. Astrophys. J. Lett. 540, L111 (2000)

    Article  ADS  Google Scholar 

  • Reames, D. V.: Magnetic topology of impulsive and gradual solar energetic particle events. Astrophys. J. Lett. 571, L63 (2002)

    Google Scholar 

  • Reames, D.V., Ng, C.K.: Heavy-element abundances in solar energetic particle events. Astrophys. J. 610, 510 (2004)

    Article  ADS  Google Scholar 

  • Reames, D.V., Meyer, J.P., von Rosenvinge, T.T.: Energetic-particle abundances in impulsive solar flare events. Astrophys. J. Suppl. 90, 649 (1994)

    Article  ADS  Google Scholar 

  • Reames, D.V., Cliver, E.W., Kahler, S.W.: Abundance enhancements in impulsive solar energetic-particle events with associated coronal mass ejections. Sol. Phys. 289, 3817 (2014a). doi:10.1007/s11207-014-0547-1

    Article  ADS  Google Scholar 

  • Reames, D.V., Cliver, E.W., Kahler, S.W.: Variations in abundance enhancements in impulsive solar energetic-particle events and related CMEs and flares. Sol. Phys. 289, 4675 (2014b). doi:10.1007/s11207-014-0589-4

    Article  ADS  Google Scholar 

  • Reames, D.V., Cliver, E.W., Kahler, S.W.: Temperature of the source plasma for impulsive solar energetic particles. Sol. Phys. 290, 1761 (2015). doi:10.1007/s11207-015-0711-2. (arXiv: 1505.02741)

  • Roth, I., Temerin, M.: Enrichment of 3He and heavy ions in impulsive solar flares. Astrophys. J. 477, 940 (1997)

    Article  ADS  Google Scholar 

  • Serlemitsos, A. T., Balasubrahmanyan, V. K., Solar particle events with anomalously large relative abundance of 3He. Astrophys. J. 198, 195 (1975)

    Google Scholar 

  • Shimojo, M., Shibata, K.: Physical parameters of solar X-ray jets. Astrophys. J. 542, 1100 (2000)

    Article  ADS  Google Scholar 

  • Temerin, M., Roth, I.: The production of 3He and heavy ion enrichment in 3He-rich flares by electromagnetic hydrogen cyclotron waves. Astrophys. J. Lett. 391, L105 (1992)

    Article  ADS  Google Scholar 

  • Vršnak, B., Cliver, E.W.: Origin of coronal shock waves. Sol. Phys. 253, 215 (2008). doi:10.1007/s11207-008-9241-5

    Article  ADS  Google Scholar 

  • Wang, Y.-M., Pick, M., Mason, G.M.: Coronal holes, jets, and the origin of 3He-rich particle events. Astrophys. J. 639, 495 (2006)

    Article  ADS  Google Scholar 

  • Yashiro, S., Gopalswamy, N., Cliver, E.W., Reames, D.V., Kaiser, M., Howard, R.: Association of coronal mass ejections and type III radio bursts with impulsive solar energetic particle event. In: Sakurai, T., Sekii, T. (eds.) The Solar-B Mission and the Forefront of Solar Physics, ASP Conference Series, vol. 325, p. 401 (2004)

    Google Scholar 

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  1. Institute for Physical Science and Technology, University of Maryland, College Park, MD, USA

    Donald V. Reames

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Reames, D.V. (2017). Impulsive SEP Events. In: Solar Energetic Particles. Lecture Notes in Physics, vol 932. Springer, Cham. https://doi.org/10.1007/978-3-319-50871-9_4

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