General Milankovitch Cycles

被引:0
|
作者
Spiegel, D. S. [1 ]
Raymond, S. N. [2 ]
Dressing, C. D. [1 ]
Scharf, C. A. [3 ,4 ]
Mitchell, J. L. [5 ]
Menou, K. [4 ]
机构
[1] Princeton Univ, Dept Astrophys Sci, Peyton Hall, Princeton, NJ 08544 USA
[2] Univ Colorado, Ctr Astrophys & Space Astron, Boulder, CO 80309 USA
[3] Columbia Univ, Colubia Astrobiol Ctr, Columbia Astrophys Lab, New York, NY 10027 USA
[4] Columbia Univ, Dept Astron, New York, NY 10027 USA
[5] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA
来源
关键词
MAIN-SEQUENCE STARS; HABITABLE CLIMATES; EARTHS OBLIQUITY; KOZAI MECHANISM; SNOWBALL EARTH; SOLAR-SYSTEM; PLANETS; EVOLUTION; ECCENTRICITY; ZONES;
D O I
暂无
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The Earth is thought to have gone through at least one globally frozen, "snowball" state in the last billion years that it presumably exited after several million years of buildup of greenhouse gases when the ice-cover shut off the carbonate-silicate cycle. Extrasolar terrestrial planets with the capacity to host life might fall into similar snowball states. Here we show that if a terrestrial planet has a giant companion on a sufficiently eccentric orbit, it can undergo Milankovitch-like oscillations of eccentricity of great enough magnitude to melt out of a snowball state.
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页码:109 / +
页数:2
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