Abstract
In the present work we aim to study particle acceleration in twisted coronal loops. For this purpose, an MHD model of magnetic reconnection in a linearly unstable twisted magnetic fluxtube is considered. Further, the electric and magnetic fields obtained in the MHD simulations are used to calculate proton and electron trajectories in the guiding-centre approximation. It is shown that particle acceleration in such a model is distributed rather uniformly along the coronal loop and the high-energy population remains generally neutral. It also follows from the model that the horizontal cross-section of the volume occupied by high-energy particles near the loop footpoints increases with time, which can be used as an observational proxy.
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Arber, T.D., Longbottom, A.W., Gerrard, C.L., Milne, A.M.: 2001, J. Comput. Phys. 171, 151.
Aschwanden, M.J., Wuesler, J.P., Nitta, N.V., Lemen, J.R.: 2009, Solar Phys. 256, 3.
Barta, M., Buchner, J., Karlicky, M., Skala, J.: 2011, Astrophys. J. 737, 24.
Baty, H.: 2000, Astron. Astrophys. 353, 1074.
Baty, H., Heyvaerts, J.: 1996, Astron. Astrophys. 308, 935.
Brown, J.C., Turkmani, R., Kontar, E.P., MacKinnon, A.L., Vlahos, L.: 2009, Astron. Astrophys. 508, 993.
Browning, P.K., Van der Linden, R.A.M.: 2008, Astron. Astrophys. 400, 355.
Browning, P.K., Gerrard, C., Hood, A.W., Kevis, R., van der Linden, R.A.M.: 2008, Astron. Astrophys. 485, 837.
Buchner, J.: 2000, Space Sci. Rev. 124, 345.
Diakonov, S.V., Somov, B.V.: 1988, Solar Phys. 116, 119.
Drake, J.F., Swisdak, M., Schoeffler, K.M., Rogers, B.N., Kobayashi, S.: 2006, Geophys. Res. Lett. 33, 13105.
Galsgaard, K., Nordlund, A.: 1996, J. Geophys. Res. 101, 13445.
Gordovskyy, M., Browning, P.K.: 2010, Astrophys. J. 729, 101.
Gordovskyy, M., Browning, P.K., Vekstein, G.E.: 2010a, Astron. Astrophys. 519, A21.
Gordovskyy, M., Browning, P.K., Vekstein, G.E.: 2010b, Astrophys. J. 720, 1603.
Hood, A.W., Browning, P.K., van der Linden, R.A.M.: 2009, Astron. Astrophys. 506, 913.
Knight, J.W., Sturrock, P.A.: 1977, Astrophys. J. 218, 306.
Kuznetsova, M., Hesse, M., Winske, D.: 2000, J. Geophys. Res. 105, 7601.
Northrop, T.: 1963, The Adiabatic Motion of Charged Particles, Interscience, New York, 32.
Sergeev, V.A., Mitchell, D.G., Russell, C.T., Williams, D.J.: 1993, J. Geophys. Res. 98, 17345.
Turkmani, R., Cargill, P.J., Galsgaard, K., Vlahos, L., Isliker, H.: 2006, Astron. Astrophys. 449, 749.
Wood, P., Neukirch, T.: 2005, Solar Phys. 226, 73.
Zharkova, V.V., Gordovskyy, M.: 2005, Astron. Astrophys. 432, 1033.
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Gordovskyy, M., Browning, P.K. Magnetic Relaxation and Particle Acceleration in a Flaring Twisted Coronal Loop. Sol Phys 277, 299–316 (2012). https://doi.org/10.1007/s11207-011-9900-9
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DOI: https://doi.org/10.1007/s11207-011-9900-9