同时对木星极光离子圈和热层进行红外观测
Ruoyan Wang1, Tom S Stallard2, Henrik Melin2
1School of Physics and Astronomy University of Leicester Leicester UK.
Journal of geophysical research. Space physics
|December 2, 2024
概括
木星的北极光显示了来自多个来源的复杂加热,而不是单一的主导来源. 加热和冷却机制之间的相互作用,可能涉及局部热力学平衡,是理解极光能量学的关键.
科学领域:
- 行星科学 行星科学
- 空间物理 空间物理
- 大气科学 大气科学
背景情况:
- 木星的极光区域是动态的,受到各种能量输入的影响.
- 了解能量平衡对于理解木星大气过程至关重要.
研究的目的:
- 为了研究木星北方红外极光的能量来源和热结构.
- 为了确定木星的极光区域内的主导加热机制.
主要方法:
- 2017年6月2日使用Keck-NIRSPEC对H3+和H2排放的同时观测.
- 制作极地投影地图,详细说明H3+辐射,旋转温度,柱子密度和H2辐射.
主要成果:
- 发现极光区域内的温度变化约为1000 K.
- 没有一个单独的极光加热机制 (粒子沉,焦尔加热,离子阻力) 被确定为占主导地位.
- 观察到各种加热机制和H3+冷却恒温器效应之间的复杂相互作用.
结论:
- 木星的北极极光区域的能量来自于加热和冷却过程的复杂相互作用.
- 局部热力学平衡可能在热层加热中发挥重要作用.
- 据推测,主要的热源来自平流层以上的高度,但低于特定排放峰值.
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