2005/03/15 | de Vaucouleurs法则[de Vaucouleurs Law]
类别(¤〖天文〗) | 评论(0) | 阅读(48) | 发表于 13:46
The surface brightness profile of most elliptical galaxies is


where is the radius of the isophote containing half the total luminosity, and is the surface brightness at .
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