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The Doppler parameter, or Doppler broadeni … The Doppler parameter, or Doppler broadening parameter, usually denoted as , is a parameter commonly used in astrophysics to characterize the width of observed spectral lines of astronomical objects. It is defined as , where is the one-dimensional velocity dispersion . Given this parameter, the velocity distribution of the line-emitting/absorbing atoms and ions proximated by a Gaussian can be rewritten as , where is the probability of the velocity along the line of sight being in the interval . The line width is also often specified in terms of the FWHM (full width at half maximum), which is .M (full width at half maximum), which is .
, 多普勒参数(英語:Doppler parameter),或多普勒致宽参数(英語:Doppler broadening parameter)是天体物理中常用来标示天体谱线宽度的物理量,通常用字母表示。其定义为 其中是一维速度弥散(,p.58)。通过这一参数,产生该谱线的粒子的高斯速度分布可被表示为 其中表示粒子的视向速度处于区间内的概率。 谱线的宽度也经常用半峰全宽(FWHM)来表示,其与多普勒参数的转换关系为 .
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rdfs:comment |
多普勒参数(英語:Doppler parameter),或多普勒致宽参数(英語:Doppler broadening parameter)是天体物理中常用来标示天体谱线宽度的物理量,通常用字母表示。其定义为 其中是一维速度弥散(,p.58)。通过这一参数,产生该谱线的粒子的高斯速度分布可被表示为 其中表示粒子的视向速度处于区间内的概率。 谱线的宽度也经常用半峰全宽(FWHM)来表示,其与多普勒参数的转换关系为 .
, The Doppler parameter, or Doppler broadeni … The Doppler parameter, or Doppler broadening parameter, usually denoted as , is a parameter commonly used in astrophysics to characterize the width of observed spectral lines of astronomical objects. It is defined as , where is the one-dimensional velocity dispersion . Given this parameter, the velocity distribution of the line-emitting/absorbing atoms and ions proximated by a Gaussian can be rewritten as , where is the probability of the velocity along the line of sight being in the interval . .he line of sight being in the interval . .
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rdfs:label |
多普勒参数
, Doppler parameter
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