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金牛座RV型变星

金牛RV型变星超巨星变星,它们表现在亮度上的变化与径向上的脉动变化息息相关,在亮度上的变化也与光谱型有关。当它们变亮时,恒星的光谱类型是F到G,而当变暗时,光谱会变成K或M。亮度变动的周期通常是30至150天,并且有主极小和次极小交替出现的行为,光度的极大度和极小值在亮度上可以相差到4星等。金牛RV型变星有分成两种类型的4个子分类:

  • RVa型变星:这一类型的金牛RV型变星的平均光度不变。
  • RVb型变星:这一类型的金牛RV型变星的平均光度会呈现周期性的变化,使它们的极大光度和极小光度在600至1,500天的时间尺度上变动。

这种变星的原型,金牛座RV是一颗RVb型变星,它的光度变化在+9.8和+13.3等之间,有规律的周期是78.7天。

金牛座RV是一颗前-AGB天体,这类天体通常是联星,并且可能有一个狭窄的星尘盘[1]

相关条目

  • Low dimensional chaos in stellar pulsations

参考资料

  • Samus N.N., Durlevich O.V., et al. Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.)
  1. ^ [1]页面存档备份,存于互联网档案馆
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金牛座RV型变星
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