Ballooning Instability in Coronal Flare Loops

被引：0
作者：
Y. T. Tsap
Y. G. Kopylova
A. V. Stepanov
V. F. Melnikov
K. Shibasaki
机构：
[1] Crimean Astrophysical Observatory,
[2] Pulkovo Observatory,undefined
[3] Radiophysical Research Institute,undefined
[4] Nobeyama Radio Observatory,undefined
来源：
Solar Physics | 2008年 / 253卷
关键词：
Flares; Waves; Instability; Radio emission;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Within the framework of ideal magnetohydrodynamics the excitation of the ballooning instability in a toroidal coronal loop with a radius of cross section a and a radius of curvature R is analyzed by using the energy method. Kink oscillations are able to excite the ballooning instability when the plasma beta parameter β>2a/R. It has been suggested that this can result in the formation of cusp-shaped coronal loops. Modulation of gyrosynchrotron emission caused by kink oscillations is considered. The intensity of gyrosynchrotron emission for optically thin sources is the most sensitive to Alfvén disturbances. The obtained theoretical results are discussed in the light of Yohkoh, SOHO, TRACE, RHESSI, and Nobeyama observations.
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页码：161 / 172
页数：11
相关论文
共 98 条
  • [1] Antiochos S.K.(1998)undefined Astrophys. J. 502 L181-undefined
  • [2] Aschwanden M.J.(1996)undefined Astrophys. J. 468 398-undefined
  • [3] Wills M.J.(1999)undefined Astrophys. J. 520 880-undefined
  • [4] Hudson H.S.(1958)undefined Proc. Roy. Soc. A 244 17-undefined
  • [5] Kosugi T.(1985)undefined Annu. Rev. Astron. Astrophys. 23 169-undefined
  • [6] Schwartz R.A.(1991)undefined Astrophys. J. 373 294-undefined
  • [7] Aschwanden M.J.(2001)undefined Solar Phys. 203 71-undefined
  • [8] Fletcher L.(2005)undefined Astron. Astrophys. 434 761-undefined
  • [9] Schrijver C.J.(1958)undefined Z. Naturforsch. A 13 936-undefined
  • [10] Alexander D.(1974)undefined Solar Phys. 34 323-undefined
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