Evaporation of Icy Planetesimals due to Bow Shocks
Evaporation of Icy Planetesimals due to Bow Shocks
复制标题
由于弓激波导致冰冷星子蒸发
DOI：
10.1088/0004-637x/764/2/120
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
H. Tanaka
中科院分区：
文献类型：
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作者：
K. K. Tanaka;T. Yamamoto;H. Miura;M. Nagasawa;T. Nakamoto;H. Tanaka
我们提出了新的概念的蒸发的星子作为一个结果的弓形激波与星子的超音速轨道相对于气体在原行星盘。我们评估的基础上，一个简单的模型描述的弓形激波的星子加热和蒸发的星子蒸发率。我们发现，半径为100公里的冰冷的星子蒸发有效，即使在雪线以外的行星寡头的增长阶段，在那里强烈的弓激波产生的引力扰动的原行星。研究结果表明，在105 Au盘区域内，由于冰质星子在原行星上的吸积不足，气体巨行星的形成受到抑制。
We present the novel concept of evaporation of planetesimals as a result of bow shocks associated with planetesimals orbiting with supersonic velocities relative to the gas in a protoplanetary disk. We evaluate the evaporation rates of the planetesimals based on a simple model describing planetesimal heating and evaporation by the bow shock. We find that icy planetesimals with radius≳ 100 km evaporate efficiently even outside the snow line in the stage of planetary oligarchic growth, where strong bow shocks are produced by gravitational perturbations from protoplanets. The obtained results suggest that the formation of gas giant planets is suppressed owing to insufficient accretion of icy planetesimals onto the protoplanet within the≲ 5 AU disk region.