Volatile-rich earth-mass planets in the habitable zone
Volatile-rich earth-mass planets in the habitable zone
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DOI：
10.1086/378397
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发表时间：
2003-10-10
影响因子：
4.9
通讯作者：
Kuchner, MJ
中科院分区：
文献类型：
--
作者：
Kuchner, MJ
小行星不一定是类地行星。在雪线之外形成的行星质量太小，无法产生快速的气体吸积（小于或类似于10（+）），应该富含挥发性冰，如H2O和NH3。这些行星中的一些应该通过与拱星盘或其他行星的相互作用而向内迁移。这样的天体可以保留它们的挥发物数十亿年或更长的时间，大约1 Au，因为它们厚厚的蒸汽大气经历缓慢的流体动力学逃逸。这些物体可能会出现在未来的太阳系外地球类似物调查中。
A small planet is not necessarily a terrestrial planet. Planets that form beyond the snow line with too little mass to seed rapid gas accretion (less than or similar to 10(+)) should be rich in volatile ices like H2O and NH3. Some of these planets should migrate inward by interacting with a circumstellar disk or with other planets. Such objects can retain their volatiles for billions of years or longer at similar to 1 AU as their thick steam atmospheres undergo slow hydrodynamic escape. These objects could appear in future surveys for extrasolar Earth analogs.