打开宇宙电磁频谱的新窗口——超长波

陈学雷

陈学雷. 打开宇宙电磁频谱的新窗口——超长波[J]. 现代物理知识, 2019, 31(3): 5-13.
引用本文: 陈学雷. 打开宇宙电磁频谱的新窗口——超长波[J]. 现代物理知识, 2019, 31(3): 5-13.

打开宇宙电磁频谱的新窗口——超长波

基金项目: 

本文的研究工作得到了中国科学院“空间科学(二期)”战略先导科技专项背景型号项目(XDA15020200),中国科学院前沿科学重点研究项目(QYZDJ-SSW-SLH017)、国家自然科学基金重点项目(11633004)、国家自然科学基金委员会中以合作项目11761141012的资助

  • 摘要: 1800年2月11日,英国天文学家威廉·赫谢尔在观测太阳光谱热效应时意外发现了肉眼不可见的红外辐射。此后,随着麦克斯韦电磁理论的建立,人们开始意识到,在可见光之外,还存在着其他波段的电磁波,它们的差别只在于频率或者说波长。现代的天文研究综合了这些不同波段的观测以获取信息。但是,地球大气对于观测不同频段的天体辐射却有很大影响。图1为地球大气对不同波段电磁辐射的吸收。我们看到,这其中有两个几乎完全透明的窗口,分别位于可见光波段和无线电波段(米波至厘米波)。我们的眼睛之所以对可见光敏感大概是长期进化的产物。现在,地面的天文观测也是以可见光和射电(无线电)天文观测为主,而其他波段特别是X射线、伽玛射线等高能天文观测,以及红外和毫米波观测,则往往依赖航天器的空间观测或火箭、气球等近邻空间观测手段,或者至少是利用高海拔观测站以尽量减少大气吸收。仅X射线波段,空间望远镜和实验就已有几十个。这些空间观测,打开了高能天文的观测窗口。
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  • 期刊类型引用(1)

    1. 张浩,王习东,刘高潮,李吉夏,吴锋泉,陈学雷. 四通道可拓展射电数字接收机系统. 天文研究与技术. 2023(06): 536-548 . 百度学术

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出版历程
  • 网络出版日期:  2023-12-04
  • 刊出日期:  2019-06-17

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