...This is called the absolute luminosity effect. The method of classifying the characteristics of stellar spectra into two dimensions, temperature and absolute luminosity, was perfected by WWMorgan and PCKeenan of the Yerkes Observatory in the 1940s, and is called the MK classification. Knowing the temperature from a star's spectrum gives the star's absolute luminosity, and comparing it with the apparent brightness gives the star's distance. ... *Some of the terminology that mentions "Keenan, PC" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…これを絶対光度効果という。恒星スペクトルの特徴を温度と絶対光度との二次元に分類する方法は,1940年代にヤーキス天文台のモーガンW.W.MorganとキーナンP.C.Keenanによって完成され,MK分類と呼ばれる。星のスペクトルから温度を知るとその星の絶対光度がわかり,見かけの明るさとの比較からその星の距離がわかる。… ※「キーナン,P.C.」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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