What are the bright loop-top kernels in soft x-ray flares?

被引：0
|
作者：
Phillips, K.J.H. [1 ]
Jakimiec, J. [2 ]
Tomczak, M. [2 ]
Falewicz, R. [2 ]
Fludra, A. [1 ]
机构：
[1] Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, United Kingdom
[2] Astronomical Institute, University of Wroclaw, M. Kopernika 11, 51-622 Wroclaw, Poland
来源：
Advances in Space Research | 2000年 / 26卷 / 11期
关键词：
Geometry - Magnetic fields - X ray films;
D O I：
10.1016/S0273-1177(01)00020-5
中图分类号：
学科分类号：
摘要：
A major puzzle in the study of solar X-ray flares is the presence of a bright, persistent 'kernel' at or near the tops of flaring loops in soft X-ray images from Yohkoh. Here we argue that they can be explained by a tangled magnetic field geometry with unresolved current sheets continually being formed. Hot (20 MK) plasma is formed near the current sheets and is surrounded by plasma which has cooled to ∼ 10 MK plasma so that the two temperatures appear to co-exist. © 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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页码：1773 / 1776
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