Y. Taroyan 2009 ApJ 694 69 doi:10.1088/0004-637X/694/1/69
Y. Taroyan
Show affiliationsA new magnetohydrodynamic (MHD) instability in coronal loops is presented. It is demonstrated that small-amplitude torsional Alfvénic disturbances generated by random photospheric motions are inevitably amplified in asymmetrically stratified loops with siphon flows. The loop asymmetry and the flow speeds can be arbitrarily small. The growth rates linked with the instability increase with increasing flow speeds. The instability is caused by over-reflection of Alfvén waves at the transition region where steep variations in density exist.
Issue 1 (2009 March 20)
Received 2008 September 12, accepted for publication 2008 December 15
Published 2009 March 13
Y. Taroyan 2009 ApJ 694 69
Alexander Pukhov 2003 Rep. Prog. Phys. 66 47
V V Kryzhniy 2003 Inverse Problems 19 573
N S Witte et al 2000 Nonlinearity 13 1439
Sami I Muslih et al 2006 Phys. Scr. 73 436
G T Clement and K Hynynen 2002 Phys. Med. Biol. 47 1219
Chang Su Kim et al 2006 Semicond. Sci. Technol. 21 1022
S R Hudson et al 2004 Plasma Phys. Control. Fusion 46 869
F M Reicha et al 1991 J. Phys. D: Appl. Phys. 24 369
Kihyung Lee and Rolf D Reitz 2004 Meas. Sci. Technol. 15 509