…He further studied the dynamics of a rotating disk-shaped stellar system as a model of the Milky Way, relating it to observations of the distribution and motion of stars perpendicular to the galactic plane, while also calculating the interstellar absorption distribution within the galactic plane. This study of the rotation of the galaxy and interstellar matter eventually gave rise to the idea of determining the rotation law from the radio radiation emitted by interstellar matter, and his student HCvan de Hulst pointed out the possibility of observing radio radiation with a wavelength of 21 cm emitted by neutral hydrogen. Their Leiden University team succeeded in observations in 1951, which further shed light on the spiral structure of the Milky Way. … *Some of the terminology references "van de Hulst, HC" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…さらに銀河系の模型としての円盤形の回転する恒星系の力学を研究して,銀河面に垂直な星の分布や運動の観測と関係づけるかたわら,銀河面内の星間吸収分布を求めた。この銀河回転と星間物質の研究は,やがて星間物質の発する電波放射から回転則を求めることを着想させ,弟子のバン・デ・フルストH.C.van de Hulstによって中性水素の出す波長21cmの電波放射観測の可能性が指摘されるに至った。彼らのライデン大学チームが観測に成功したのは1951年で,これにより銀河系の渦構造がいっそう明らかになった。… ※「van de Hulst,H.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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