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蓝移

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物理学领域,蓝移(英语:blueshift)是指电磁波由于某种原因导致波长变短、频率升高的现象,在可见光波段,表现为光谱的谱线朝蓝端移动了一段距离。相反的,电磁波波长增加、频率降低的现象被称为红移

光化学中,蓝移也非正式地指浅色效应。

例子

天文学中,除了多数星体的红移现象,也有观察到部分星体发生蓝移现象,例如:

多普勒蓝移

引力蓝移

蓝异常值

宇宙学蓝移

在天文学上蓝移的成因

红移蓝移示意图

这些是在天文学上已知可以造成蓝移的原因:

  1. 朝向我们移动的光源,例如
    1. 旋转中的星系向地球接近的一侧。
    2. 蝎虎BL类星体相对的喷流中,朝向地球的一支。
    3. 一些星系 [1]和类星体 [2]
  2. 重力效应。参考重力红移

相关条目

参考来源

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蓝移
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