How Hot Can Small Solar Flares Get?

IF 2.7 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Solar Physics Pub Date : 2023-01-26 DOI:10.1007/s11207-022-02106-1

Louise Harra, Andrea F. Battaglia, Krzysztof Barczynski, Hannah Collier, Säm Krucker, Katharine K. Reeves, George Doschek

引用次数: 0

Abstract

The temperature reached by solar flares is a key parameter to understanding the physical process that causes the energy release. In this work, we analysed data from a Hinode Observing Programme that focused on high cadence measurement of the flaring plasma. This was carried out when the X-ray imager and spectrometer (STIX) on Solar Orbiter was observing. We analysed 3 small microflares, and determined their evolution and temperature. The temperature of the B2.8 microflare reached 16 MK. There was evidence in the smaller B1.4 flare of Fe xxiv emission, indicating that hot plasma of 15 MK can be reached.

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小太阳耀斑能达到多热?

太阳耀斑达到的温度是理解导致能量释放的物理过程的关键参数。在这项工作中，我们分析了来自日野观测计划的数据，该计划专注于耀斑等离子体的高节奏测量。这是在太阳轨道器上的x射线成像仪和光谱仪(STIX)观测时进行的。我们分析了3个小的微耀斑，并确定了它们的演化和温度。B2.8微耀斑的温度达到了16 MK，而较小的B1.4微耀斑的fexxiv发射有证据表明可以达到15 MK的热等离子体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solar Physics 地学天文-天文与天体物理

CiteScore

5.10

自引率

17.90%

发文量

146

审稿时长

1 months

期刊介绍： Solar Physics was founded in 1967 and is the principal journal for the publication of the results of fundamental research on the Sun. The journal treats all aspects of solar physics, ranging from the internal structure of the Sun and its evolution to the outer corona and solar wind in interplanetary space. Papers on solar-terrestrial physics and on stellar research are also published when their results have a direct bearing on our understanding of the Sun.