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arXiv 1004.4137astro-ph.EPastro-ph.SR
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行星迁移

Planet Migration

Stephen H. Lubow, Shigeru Ida

摘要:

行星迁移是行星轨道半径随时间变化的过程。导致气体巨行星迁移的主要因素是年轻行星与形成它的气体盘的引力相互作用。我们描述的迁移率从这些相互作用的基础上一个简单的模型磁盘属性。这些迁移率高于地球生存的合理水平。我们讨论了一些建议的模型,其迁移率较低。由于缺乏对磁盘详细物理属性的了解,迁移率存在很大的不确定性。我们还介绍了一些其他形式的移徙。

英文摘要:

Planet migration is the process by which a planet's orbital radius changes in time. The main agent for causing gas giant planet migration is the gravitational interaction of the young planet with the gaseous disk from which it forms. We describe the migration rates resulting from these interactions based on a simple model for disk properties. These migration rates are higher than is reasonable for planet survival. We discuss some proposed models for which the migration rates are lower. There are major uncertainties in migration rates due to a lack of knowledge about the detailed physical properties of disks. We also describe some additional forms of migration.

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