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冥府行星

艺术家观点中的柯洛7b
艺术家观点中的正横越过母恒星的HD 209458 b

冥府行星(Chthonian,发音为/ˈkθoʊniən/,有时会拼错为Cthonian),是一种假设中的天体类型,成因是外围数层的被剥离之后的气体巨星。这些大气层被剥离是行星过度接近恒星的结果,残余的岩石金属核心在许多方面将类似于类地行星[1]

HD 209458 b(欧西里斯)是大气层被剥离过程中行星的一个例子,但是它本身尚不是一颗冥府行星,在可见未来内也还不会成为冥府行星(有些科学家建议水星是一颗冥府行星,因为它的高密度和富含金属的核心,但除此之外没有其它的相似之处)。

柯洛7b可能是被发现的第一颗冥府行星[2]

Chthonia χθων这个名词是由Hébrard等所开始使用的,为希腊文,其意思是“在地球之下”,一般指来自地狱地下的希腊神灵。

参见

参考文献

  1. ^ Hébrard, G.; Étangs, A. Lecavelier des; Vidal-Madjar, A.; Désert, J.-M.; Ferlet, R. Evaporation rate of hot Jupiters and formation of Chthonian planets. 2003-12-15 [2020-09-08]. (原始内容存档于2019-07-30) (英语). 
  2. ^ Exoplanets Exposed to the Core. AstroBiology Magazine. 2009-04-25 [2009-07-13]. (原始内容存档于2012-04-10). 
  3. ^ Planet : CoRoT-7 b. [2009-06-13]. (原始内容存档于2019-12-13). 
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冥府行星
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