PARTICLE ACCELERATION BY MAGNETIC RECONNECTION IN A TWISTED CORONAL LOOP

被引：48

作者：

Gordovskyy, Mykola ^{[1
]}

Browning, Philippa K. ^{[1
]}

机构：

[1] Univ Manchester, Jodrell Bank, Ctr Astrophys, Manchester M13 9PL, Lancs, England

来源：

ASTROPHYSICAL JOURNAL | 2011年 / 729卷 / 02期

关键词：

acceleration of particles; magnetic reconnection; Sun: flares; X-RAY BREMSSTRAHLUNG; SOLAR-FLARES; CURRENT SHEETS; SIMULATIONS; EMISSION; EVENT;

D O I：

10.1088/0004-637X/729/2/101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Photospheric motions may lead to twisted coronal magnetic fields which contain free energy that can be released by reconnection. Browning & Van der Linden suggested that such a relaxation event may be triggered by the onset of ideal kink instability. In the present work, we study the evolution of a twisted magnetic flux tube with zero net axial current following Hood et al. Based on the obtained magnetic and electric fields, proton and electron trajectories are calculated using the test-particle approach. We discuss resulting particle distributions and possible observational implications, for example, for small solar flares.

引用

页数：6

共 19 条

[1] A staggered grid, Lagrangian-Eulerian remap code for 3-D MHD simulations [J].

Arber, TD ;

Longbottom, AW ;

Gerrard, CL ;

Milne, AM .

JOURNAL OF COMPUTATIONAL PHYSICS, 2001, 171 (01) :151-181

[2] Local re-acceleration and a modified thick target model of solar flare electrons [J].

Brown, J. C. ;

Turkmani, R. ;

Kontar, E. P. ;

MacKinnon, A. L. ;

Vlahos, L. .

ASTRONOMY & ASTROPHYSICS, 2009, 508 (02) :993-1000

[3] Heating the corona by nanoflares: simulations of energy release triggered by a kink instability [J].

Browning, P. K. ;

Gerrard, C. ;

Hood, A. W. ;

Kevis, R. ;

Van der Linden, R. A. M. .

ASTRONOMY & ASTROPHYSICS, 2008, 485 (03) :837-848

[4] Solar coronal heating by relaxation events [J].

Browning, PK ;

Van der Linden, RAA .

ASTRONOMY & ASTROPHYSICS, 2003, 400 (01) :355-367

[5]

DIAKONOV SV, 1988, SOL PHYS, V116, P119, DOI 10.1007/BF00171718

[6] EFFECT OF REVERSE CURRENTS ON THE DYNAMICS OF NONTHERMAL ELECTRON-BEAMS IN SOLAR-FLARES AND ON THEIR EMITTED X-RAY BREMSSTRAHLUNG [J].

EMSLIE, AG .

ASTROPHYSICAL JOURNAL, 1980, 235 (03) :1055-1065

[7]

Forbes T., 2000, ENCY ASTRONOMY ASTRO, V2295, DOI [10.1888/0333750888/2295, DOI 10.1888/0333750888/2295]

[8] Particle acceleration in a transient magnetic reconnection event [J].

Gordovskyy, M. ;

Browning, P. K. ;

Vekstein, G. E. .

ASTRONOMY & ASTROPHYSICS, 2010, 519

[9] PARTICLE ACCELERATION IN FRAGMENTING PERIODIC RECONNECTING CURRENT SHEETS IN SOLAR FLARES [J].

Gordovskyy, M. ;

Browning, P. K. ;

Vekstein, G. E. .

ASTROPHYSICAL JOURNAL, 2010, 720 (02) :1603-1611

[10] Coronal heating by magnetic reconnection in loops with zero net current [J].

Hood, A. W. ;

Browning, P. K. ;

Van der Linden, R. A. M. .

ASTRONOMY & ASTROPHYSICS, 2009, 506 (02) :913-925

← 1 2 →