...The size of a celestial object can be calculated by analyzing the degree of contrast of such interference fringes. Practical application of this method was again extremely difficult due to the turbulence of the Earth's atmosphere, but in 1920, AA Michelson and FGPease at Mount Wilson Observatory were the first to successfully measure the apparent diameter of a star using this method. In this observation, the apparent diameter of the red supergiant Betelgeuse was measured to be 0.047 arcseconds, and using the distance to the star known at the time, it was shown that the radius of the star is 300 times the radius of the Sun. ... *Some of the terminology explanations that mention "Pease, FG" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このような干渉縞のコントラストの度合の解析から逆に天体の大きさを求めることができる。この方法の実際の応用は再び地球大気の乱流のため困難をきわめたが,1920年にマイケルソンA.A.MichelsonとピースF.G.Peaseはウィルソン山天文台において初めてこの方法で恒星視直径の実測に成功した。この観測では赤色超巨星ベテルギウスの視直径が0.047秒角と測定され,当時知られていたこの星までの距離を用いてこの星の半径が太陽半径の300倍にも達することが示された。… ※「Pease,F.G.」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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