Volatile-rich earth-mass planets in the habitable zone

被引：132

作者：

Kuchner, MJ ^{[1
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 596卷 / 01期

基金：

美国国家航空航天局;

关键词：

astrobiology; planetary systems;

D O I：

10.1086/378397

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：L105 / L108

页数：4

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