Abstract
3He-rich solar energetic particle (SEP) events show huge enrichments of 3He and association with kilovolt electrons and Type-III radio bursts. Observations from a new generation of high resolution instruments launched on the Wind, ACE, Yohkoh, SOHO, TRACE, and RHESSI spacecraft have revealed many new properties of these events: the particle energy spectra are found to be either power-law or curved in shape, with the 3He spectrum often being distinctly different from other species. Ultra-heavy nuclei up to >200 amu are found to be routinely present at average enrichments of >200 times solar-system abundances. The high ionization states previously observed near ∼1 MeV/nucleon have been found to decrease towards normal solar coronal values in these events. The source regions have been identified for many events, and are associated with X-ray jets and EUV flares that are associated with magnetic reconnection sites near active regions. This paper reviews the current experimental picture and theoretical models, with emphasis on the new insights found in the last few years.
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References
E. Anders, N. Grevesse, Geochim. Cosmochim. Acta 53, 197 (1989)
M.I. Desai et al., Astrophys. J. 588, 1149 (2003)
W. Dröge, J.J. Kartavykh, B. Klecker, G.M. Mason, Astrophys. J. 645, 1516 (2006)
L.A. Fisk, Astrophys. J. 224, 1048 (1978)
D. Hovestadt et al., Solar Phys. 162, 441 (1995)
J.J. Kartavykh, W. Dröge, V.M. Ostryakov, G.A. Kovaltsov, Solar Phys. 227, 123 (2005)
B. Klecker et al., Astrophys. J. 281, 458 (1984)
B. Klecker et al., Adv. Space Res. 38, 493 (2006)
K.-L. Klein, A. Posner, Astron. Astrophys. 438, 1029 (2005)
L.G. Kocharov, G.E. Kocharov, Space Sci. Rev. 38, 89 (1984)
L.G. Kocharov, G.A. Kovaltsov, J. Torsti, V.M. Ostryakov, Astron. Astrophys. 357, 716 (2000)
S. Krucker, R.P. Lin, E.P. Kontar, G.M. Mason, M.E. Wiedenbeck, EOS, Trans. Am. Geophys. U 2003 Fall Meeting Suppl., paper SH11D, 2003
S. Liu, V. Petrosian, G.M. Mason, Astrophys. J. Lett. 613, L81 (2004)
S. Liu, V. Petrosian, G.M. Mason, Astrophys. J. 636, 462 (2006)
A. Luhn, B. Klecker, D. Hovestadt, E. Möbius, Astrophys. J. 317, 951 (1987)
G.M. Mason, D.V. Reames, B. Klecker, D. Hovestadt, T.T. von Rosenvinge, Astrophys. J. 303, 849 (1986)
G.M. Mason et al., Space Sci. Rev. 86, 409 (1998)
G.M. Mason et al., Astrophys. J. 574, 1039 (2002)
G.M. Mason et al., Astrophys. J. 606, 555 (2004)
J.A. Miller, Astrophys. J. 491, 939 (1997)
J.A. Miller, Space Sci. Rev. 86, 79 (1998)
E. Möbius et al., Space Sci. Rev. 86, 449 (1998)
E. Möbius, M. Scholer, D. Hovestadt, B. Klecker, G. Gloeckler, Astrophys. J. 259, 397 (1982)
G. Paesold, R. Kallenbach, A.B. Benz, Astrophys. J. 582, 495 (2003)
M. Pick, G.M. Mason, Y.-M. Wang, C. Tan, L. Wang, Astrophys. J. 648, 1247 (2006)
D.V. Reames, Adv. Space Res. 15, 41 (1995)
D.V. Reames, Space Sci. Rev. 90, 413 (1999)
D.V. Reames, Astrophys. J. Lett. 540, L111 (2000)
D.V. Reames, J.P. Meyer, T.T. von Rosenvinge, Astrophys. J. Suppl. 90, 649 (1994)
I. Roth, M. Temerin, Ap. J. 477, 940 (1997)
M. Shimojo, K. Shibata, Astrophys. J. 542, 1100 (2000)
E.K. Shirk, P.B. Price, in Proc. 13th ICRC, vol. 2, Denver (1973), p. 1474
E.C. Stone et al., Space Sci. Rev. 86, 357 (1998)
M. Temerin, I. Roth, Astrophys. J. Lett. 391, L105 (1992)
T.T. von Rosenvinge et al., Space. Sci. Rev. 71, 155 (1995)
Y.-M. Wang, N.R. Sheeley Jr., Astrophys. J. 575, 542 (2002)
L. Wang, R.P. Lin, S. Krucker, G.M. Mason, in: Solar Wind 11/SOHO 16, A Study of the Solar Injection for Eleven Impulsive Electron/ 3 He-rich SEP Events. Whistler, Canada, 2005
L. Wang, R.P. Lin, S. Krucker, J.T. Gosling, Geophys. Res. Let. 33, L03106 (2006a) doi: 10.1029/2005GL024434
Y.-M. Wang, M. Pick, G.M. Mason, Astrophys. J. 639, 495 (2006b)
M.E. Wiedenbeck et al., in AIP Conf. Proc. #679, How Common are Flare Suprathermals in the Inner Heliosphere? ed. by M. Velli, R. Bruno, F. Malara (AIP, New York, 2003), p. 652
M.E. Wiedenbeck et al., in ICRC 29, The Time Variation of Energetic 3 He in Interplanetary Space from 1997 to 2005, Pune, India, 2005
T.X. Zhang, Astrophys. J. 518, 954 (1999)
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Mason, G.M. 3He-Rich Solar Energetic Particle Events. Space Sci Rev 130, 231–242 (2007). https://doi.org/10.1007/s11214-007-9156-8
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DOI: https://doi.org/10.1007/s11214-007-9156-8