DISK-FED GIANT PLANET FORMATION
DISK-FED GIANT PLANET FORMATION
复制标题
盘式巨行星的形成
DOI:
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发表时间:
2016
期刊:
影响因子:
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通讯作者:
K. Menou
中科院分区:
文献类型:
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作者:
J. Owen;K. Menou
Massive giant planets, such as the ones being discovered by direct imaging surveys, likely experience the majority of their growth through a circumplanetary disk. We argue that the entropy of accreted material is determined by boundary layer processes, unlike the “cold-” or “hot-start” hypotheses usually invoked in the core-accretion and direct-collapse scenarios. A simple planetary evolution model illustrates how a wide range of radius and luminosity tracks become possible, depending on details of the accretion process. Specifically, the protoplanet evolves toward “hot-start” tracks if the scale height of the boundary layer is ≳0.24, a value not much larger than the scale height of the circumplanetary disk. Understanding the luminosity and radii of young giant planets will thus require detailed models of circumplanetary accretion.