太阳能控制特里顿上层大气层的太阳能控制
1Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena 91125, USA.
Science (New York, N.Y.)
|April 10, 1992
概括
特里顿的电离层可能是由太阳辐射控制的,而不是海王星的磁层. 一个新的大气模型表明,太阳能驱动的化学反应,碳原子在顿的电离层中起着关键作用.
科学领域:
- 行星科学 行星科学
- 大气化学 大气化学
- 空间物理 空间物理
背景情况:
- 以前人们认为,顿的电离层受到海王星磁层电子沉的影响.
- 这将使得Triton作为唯一一个拥有非太阳辐射控制的电离层的太阳系天体而独一无二.
研究的目的:
- 调查太阳辐射或海王星的磁层是否主要控制着顿的上层大气和电离层.
- 为了在太阳辐射影响下建模Triton的大气化学.
主要方法:
- 开发一个新的特里顿大气模型.
- 包括太阳辐射作为主要能源.
- 模拟离子 (N2+) 和碳 (C) 之间的电荷转移反应.
主要成果:
- 该模型预测了Triton大气层中大量的碳原子列.
- 计算的峰值C+丰度与旅行者对峰值电子密度的测量密切匹配.
- 这支持太阳控制的特里顿大气化学.
结论:
- 特里顿上层大气中的化学成分很可能是由太阳辐射控制的.
- 需要对低温反应速率常数进行进一步的研究来证实这些发现.
- 这挑战了以前关于磁层控制的假设.
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