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arXiv 1502.00315astro-ph.SR
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太阳耀斑中的能量分配和演化

Energy Partitions and Evolution in a Purely Thermal Solar Flare

Gregory D. Fleishman, Gelu M. Nita, Dale E. Gary

摘要:

本文提出了一个单独的热耀斑,我们检测到在微波范围内的热陀螺仪和自由自由发射它产生的。分析热陀螺仪发射的一个优点是其精确产生辐射体积中的磁场的独特能力。当结合观测推导的等离子体密度和温度,这些磁场测量提供了一个简单的方法来跟踪耀斑中的磁场和热能的演变。对于这里描述的事件,无线电发射体积中的磁能密度在耀斑上升阶段下降,然后在扩展峰值阶段期间大致保持恒定,但在衰减阶段恢复到原始水平。在磁能密度降低的阶段,热能密度增加;然而,这种增加不足以补偿磁能降低,大约增加一个数量级。当磁能释放结束时,源参数恢复到接近其原始值。我们讨论可能的情况来解释这种行为。

英文摘要:

This paper presents a solely thermal flare, which we detected in the microwave range from the thermal gyro- and free-free emission it produced. An advantage of analyzing thermal gyro emission is its unique ability to precisely yield the magnetic field in the radiating volume. When combined with observationally-deduced plasma density and temperature, these magnetic field measurements offer a straightforward way of tracking evolution of the magnetic and thermal energies in the flare. For the event described here, the magnetic energy density in the radio-emitting volume declines over the flare rise phase, then stays roughly constant during the extended peak phase, but recovers to the original level over the decay phase. At the stage where the magnetic energy density decreases, the thermal energy density increases; however, this increase is insufficient, by roughly an order of magnitude, to compensate for the magnetic energy decrease. When the magnetic energy release is over, the source parameters come back to nearly their original values. We discuss possible scenarios to explain this behavior.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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