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K型主序星

橙矮星 ,也就是K型主序星(KV),是主序带(以为燃料)上,光谱类型为K,亮度分类为V的恒星。这些恒星的大小介于M型主序星、亮度分类为V,和G型主序星、亮度分类为V的恒星之间,质量是太阳质量的0.5至0.8倍,表面温度在3,900至5,200K[1], Tables VII, VIII.

这种恒星是我们寻找在地球外的生命时最感兴趣的,因为它们停留在主序带上稳定的时间很长(150亿至300亿年,相较之下太阳只有100亿年),这样就可能有机会在环绕着的类地行星上创造出生命[2]

此种恒星的例子有半人马座α星B印第安座 ε [3]奎宿增三HD 13445牛宿增十天苑四

参考资料

  1. ^ Empirical bolometric corrections for the main-sequence页面存档备份,存于互联网档案馆), G. M. H. J. Habets and J. R. W. Heintze, Astronomy and Astrophysics Supplement 46 (November 1981), pp. 193–237.
  2. ^ [1]页面存档备份,存于互联网档案馆), retrieved on May 6, 2009.
  3. ^ SIMBAD, entries for Alpha Centauri B页面存档备份,存于互联网档案馆) and Epsilon Indi页面存档备份,存于互联网档案馆), accessed on line June 19, 2007.

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K型主序星
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