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猎犬座α²型变星

猎犬座α2型变星变星的一种类型。这些恒星或学成分特殊主序光谱类型为B8p至A7p。它们具很强的磁场和强、或谱线。其亮度通常在0.5到160天内变化0.01至0.1星等[1]

除了光的强度之外,猎犬座α2型变星的谱线强度和轮廓也会改变,连磁场也会变化。这些变化的周期都是相同的,被认为是恒星的自转周期。一般认为是因为这修恒星的大气层中的金属分布不均匀造成的,因此恒星表面各处的亮度因点而异[2]

这类变星的命名是依据北天星座猎犬座的联星常陈一中的一颗恒星(猎犬座α2)命名。它的亮度以5.47天的周期波动0.14星等[3]

参考资料

  1. ^ Variability types, General Catalogue of Variable Stars页面存档备份,存于互联网档案馆), Sternberg Astronomical Institute, Moscow, Russia. Accessed on line August 20, 2008.
  2. ^ pp. 83–85, Variable Stars, Michel Petit, foreword by Paolo Maffei, tr. from French by W. J. Duffin, Chichester, UK: John Wiley & Sons, 1987, ISBN 0-471-90920-3.
  3. ^ alf 2 CVn , database entry, General Catalogue of Variable Stars页面存档备份,存于互联网档案馆), Sternberg Astronomical Institute, Moscow, Russia. Accessed on line August 20, 2008.
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猎犬座α²型变星
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