…A type of emission star discovered in 1867 by Wolf C. Wolf and Rayet G. Rayet of the Paris Observatory. Its spectrum is characterized by broad and strong emission lines emitted by ionized ions such as He, O, N, and C. Based on the ionization stage of the ions, the surface temperature of the star is estimated to be 40,000 to 60,000 K. In addition, if the width of the emission lines is considered to be due to the Doppler effect caused by atmospheric motion, the atmosphere of a Wolf-Rayet star is in a state of outflow at a high speed of 2000 to 4000 km/s. It is also known that this star has an abnormal chemical composition, which is divided into a C-rich carbon series and a N-rich nitrogen series, and its relationship with stellar evolution is attracting attention. … *Some of the terminology that mentions "Rayet, G." is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…1867年にパリ天文台のウォルフC.WolfとライエG.Rayetによって発見された輝線星の一種。スペクトルはHe,O,N,Cなどの電離イオンが放射する幅広く強い輝線が特徴である。イオンの電離段階から星の表面温度は4万~6万Kと推定される。また,輝線の幅を大気運動によるドップラー効果によるものと考えると,ウォルフ=ライエ星の大気は2000~4000km/sの高速度で流出状態にある。この星には化学組成の異常も知られており,Cに富む炭素系列とNに富む窒素系列に分かれ,星の進化との関係が注目されている。… ※「Rayet,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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