猎犬座α2型变星

獵犬座α2型變星變星的一種類型。這些恆星或學成份特殊主序光譜類型為B8p至A7p。它們具很強的磁場和強、或譜線。其亮度通常在0.5到160天內變化0.01至0.1星等[1]

除了光的強度之外,獵犬座α2型變星的譜線強度和輪廓也會改變,連磁場也會變化。這些變化的週期都是相同的,被認為是恆星的自轉週期。一般認為是因為這修恆星的大氣層中的金屬分布不均勻造成的,因此恆星表面各處的亮度因點而異[2]

這類變星的命名是依據北天星座獵犬座的聯星常陳一中的一顆恆星(獵犬座α2)命名。它的亮度以5.47天的週期波動0.14星等[3]

參考資料

  1. Variability types, General Catalogue of Variable Stars Archived 2012-03-18 at WebCite, 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, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line August 20, 2008.
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