高频声波不足以加热太阳染色层
1Institute of Theoretical Astrophysics, University of Oslo, PB 1029 Blindern, 0315 Oslo, Norway. astrid.fossum@astro.uio.no
Nature
|June 17, 2005
概括
在太阳中检测到高频声波,但没有足够的能量来加热太阳染色体. 这些波不能解释太阳的外层大气和表面之间的温度差异.
科学领域:
- 太阳物理 太阳物理
- 血物理学的等离子体物理学
- 天体物理学 天体物理学
背景情况:
- 太阳的外层大气明显比它的表面更热,这是太阳物理学的长期难题.
- 在地下层中产生的高频声波 (10-50毫赫兹) 被假设为非磁性区域的太阳色谱层的主要加热机制.
研究的目的:
- 为了检测太阳中的高频声波.
- 为了量化这些波的声学能量流.
- 为了确定这些波是否可以解释太阳染色层的升温.
主要方法:
- 使用先进的观察技术检测高频声波.
- 数字模拟用于模拟太阳大气中的波传播和能量转移.
- 计算的声学能量流与染色体中的辐射能量损失的比较.
主要成果:
- 检测到的高频声波被证实.
- 发现这些波的声学能量流量至少比平衡辐射损失所需低10倍.
- 声波所携带的能量不足以加热太阳染色体.
结论:
- 声波似乎不是太阳色谱层的主导加热机制.
- 太阳表面和外层大气温度之间的差异仍然是一个需要替代解释的开放问题.
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