论文标题
分析方法的巨型星球形成晚期
Analytic Approach to the Late Stages of Giant Planet Formation
论文作者
论文摘要
本文构建了巨型行星形成晚期的分析描述。在这一进化阶段，地球通过速率快速获得气体积聚的大部分质量。这项工作确定了落在中央行星及其圆周磁盘上的材料的密度和速度场，并找到了该插入包膜的相应柱密度。我们为磁盘的表面密度得出了稳态溶液作为其粘度的函数（包括没有发生磁盘积聚的极限情况）。行星磁场截断了磁盘的内边缘，并从直接插入和磁盘上确定质量积聚到行星上的边界条件。确定了形成行星及其磁盘的特性，包括从插入到行星和磁盘表面的光度贡献以及磁盘粘度。通过对紧急光谱分布的准球形处理，探索了行星形成过程的辐射特征。本文开发的分析解决方案显示了原理特性（包络密度分布，速度场，柱密度，磁盘表面密度，发光度和辐射特征）如何随输入参数（瞬时质量，轨道，轨道位置，积分速率和行星磁场强度）而变化。
This paper constructs an analytic description for the late stages of giant planet formation. During this phase of evolution, the planet gains the majority of its final mass through gas accretion at a rapid rate. This work determines the density and velocity fields for material falling onto the central planet and its circumplanetary disk, and finds the corresponding column density of this infalling envelope. We derive a steady-state solution for the surface density of the disk as a function of its viscosity (including the limiting case where no disk accretion occurs). Planetary magnetic fields truncate the inner edge of the disk and determine the boundary conditions for mass accretion onto the planet from both direct infall and from the disk. The properties of the forming planet and its circumplanetary disk are determined, including the luminosity contributions from infall onto the planet and disk surfaces, and from disk viscosity. The radiative signature of the planet formation process is explored using a quasi-spherical treatment of the emergent spectral energy distributions. The analytic solutions developed herein show how the protoplanet properties (envelope density distribution, velocity field, column density, disk surface density, luminosity, and radiative signatures) vary with input parameters (instantaneous mass, orbital location, accretion rate, and planetary magnetic field strength).
