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Nanoflare heating model for collisionless solar corona

机译:无碰撞太阳电晕的纳米火炬加热模型

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摘要

The problem of coronal heating remains one of the greatest unresolved problems in space science. Magnetic reconnection plays a significant role in heating the solar corona. When two oppositely directed magnetic fields come closer to form a current sheet, the current density of the plasma increases due to which magnetic reconnection and conversion of magnetic energy into thermal energy takes place. The present paper deals with a model for reconnection occurring in the solar corona under steady state in collisionless regime. The model predicts that reconnection time in the solar corona varies inversely with the cube of magnetic field and varies directly with the Lindquist number. Our analysis shows that reconnections are occurring within a time interval of600 s in the solar corona, producing nanoflares in the energy range $10^{21}a€“10^{23}$ erg/s which matches with Yohkoh X-ray observations.
机译:日冕加热问题仍然是空间科学中最大的未解决问题之一。磁重新连接在加热日冕中起着重要作用。当两个相反方向的磁场更接近以形成电流片时,等离子体的电流密度会增加,这是由于发生了磁重新连接以及将磁能转换为热能。本文研究了在无碰撞状态下稳定状态下发生在日冕中的重新连接模型。该模型预测,日冕中的重新连接时间与磁场的立方成反比,而与Lindquist数成正比。我们的分析表明,重新连接发生在太阳电晕的600 s的时间间隔内,产生能量范围为$ 10 ^ {21} a€” 10 ^ {23} $ erg / s的纳米光斑,与Yohkoh X射线观测结果相符。

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