...Long-period variables are the stars with the largest radii and the lowest surface temperatures. (4) W Virgo and RV Tauri Cepheids are typical Population I stars, but among Population II objects such as globular clusters, there are pulsating variables with periods longer than one day, which are called Population II Cepheids or W Virgo stars. Population II Cepheids are characterized by a bulge called a "shoulder" after the maximum peak in their light curves. ... *Some of the terminology that refers to "RV Tauri stars" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…長周期変光星は,恒星の中でもっとも半径の大きく,表面温度の低い星である。(4)おとめ座W型星とおうし座RV型星 ケフェイドは典型的種族Iの星であるが,球状星団などの種族IIの天体中にも,周期が1日よりも長い脈動変光星があり,種族IIのケフェイド,あるいはおとめ座W型星と呼んでいる。種族IIのケフェイドの場合,光度曲線で極大の山の後に“肩”と呼ばれる膨らみがあるのが特徴である。… ※「おうし座 RV 型星」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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