Dust accretion onto high-mass planets
Dust accretion onto high-mass planets
复制标题
大质量行星上的尘埃吸积
DOI：
10.1051/0004-6361:20066326
复制
发表时间：
2006
影响因子：
6.5
通讯作者：
S. Paardekooper
中科院分区：
文献类型：
--
作者：
S. Paardekooper
目标。我们研究了不同大小的尘埃粒子在嵌入的大质量气体巨行星上的吸积，其中我们考虑了由于行星的存在而产生的气盘的结构。固体的吸积率对巨型行星的结构很重要：它决定了可能存在的固体核心的增长率以及它们在固体中的最终浓缩。方法：研究方法。我们使用Rodeo流体动力学求解器来求解气体的流动方程，并使用粒子方法来求解粉尘。粒子运动方程的解算器相对于阻力是隐式的，这允许我们处理整个尘埃粒度谱。结果。我们发现，尘埃的吸积仅限于最小的颗粒尺寸。最大的粒子被困在与行星的外部平均运动共振中，而中等大小的粒子被气体盘中的密度结构推离行星的轨道。只有小于约$S_{\rm max}=10$\m的粒子才能在质量为木星的行星上共生。对于质量小十倍的行星，$S_{\rm max}=100$n$\mathm{\m m}$。尘埃的吸积强烈减少，使得在一颗新形成的巨大行星上进行固体浓缩变得非常困难。
Aims. We study the accretion of dust particles of various sizes onto embedded massive gas giant planets, where we take into account the structure of the gas disk due to the presence of the planet. The accretion rate of solids is important for the structure of giant planets: it determines the growth rate of the solid core that may be present as well as their final enrichment in solids. Methods. We use the RODEO hydrodynamics solver to solve the flow equations for the gas, together with a particle approach for the dust. The solver for the particles' equations of motion is implicit with respect to the drag force, which allows us to treat the whole dust size spectrum. Results. We find that dust accretion is limited to the smallest particle sizes. The largest particles get trapped in outer mean-motion resonances with the planet, while particles of intermediate size are pushed away from the orbit of the planet by the density structure in the gas disk. Only particles smaller than approximately $s_{\rm max} =10$ $\mathrm{\mu m}$ may accrete on a planet with the mass of Jupiter. For a ten times less massive planet $s_{\rm max}=100$ $\mathrm{\mu m}$. The strongly reduced accretion of dust makes it very hard to enrich a newly formed giant planet in solids.
影响因子：
3.2
作者：
Blum, J;Wurm, G
通讯作者：
Wurm, G