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The Sérsic profile (or Sérsic model or Sérsic's law) is a mathematical function that describes how the intensity of a galaxy varies with distance from its center. It is a generalization of de Vaucouleurs' law. José Luis Sersic first published his law in 1963.〔J. L. Sérsic (1963), ( Influence of the atmospheric and instrumental dispersion on the brightness distribution in a galaxy )〕 ==Definition== The Sérsic profile has the form : where is the intensity at . The parameter , called the "Sérsic index," controls the degree of curvature of the profile (see figure). The smaller the value of , the less centrally concentrated the profile is and the shallower (steeper) the logarithmic slope at small (large) radii is: : 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sersic profile」の詳細全文を読む スポンサード リンク
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