论文标题
同时在一对巨型行星上同时吸收气体：对它们的最终质量和原电磁磁盘结构的影响
Simultaneous gas accretion onto a pair of giant planets: Impact on their final mass and on the protoplanetary disk structure
论文作者
论文摘要
已知几个行星系统可容纳多个巨型行星。但是，当两个巨型行星从同一磁盘中积聚时，尚不清楚第二行星对这两个行星的气体积聚过程的影响有何影响。在本文中，我们使用FARGO-2D1D代码进行了长期的2D等热流体动力学模拟（超过0.5 myrs），考虑了两个从同一气态磁盘中积聚的非迁移行星。我们发现，行星质量比的演变取决于间隙的形成。但是，在所有情况下，当行星同时开始积聚时，它们最终会得到非常相似的质量（0.9 $ <m_ {p，out}/m_ {p，in} <$ 1.1，<$ 1.1。延迟一个行星的积聚开始可以使行星的质量比最初达到更大的值，但随后它们迅速收敛到类似的质量（0.8 $ <m_ {p，out}/m_ {p，in} <$ 2 in} <$ 2 in $ 10^5 $ yrs）。为了重现外部球星的质量比更多样化的质量比，行星必须在不同的时间开始积聚气体，并且必须在倒入气体积聚（小于0.5 myrs）之后迅速停止其积聚，例如通过磁盘传播。行星质量比的演变可能会对系统的动力学产生重要影响，并可能限制木星和土星的形成历史。
Several planetary systems are known to host multiple giant planets. However, when two giant planets are accreting from the same disk, it is unclear what effect the presence of the second planet has on the gas accretion process of both planets. In this paper we perform long-term 2D isothermal hydrodynamical simulations (over more than 0.5 Myrs) with the FARGO-2D1D code, considering two non-migrating planets accreting from the same gaseous disk. We find that the evolution of the planets' mass ratio depends on gap formation. However, in all cases, when the planets start accreting at the same time, they end up with very similar masses (0.9 $<m_{p,out}/m_{p,in}<$ 1.1 after 0.5 Myrs). Delaying the onset of accretion of one planet allows the planets' mass ratio to reach larger values initially, but they quickly converge to similar masses afterward (0.8 $<m_{p,out}/m_{p,in}<$ 2 in $10^5$ yrs). In order to reproduce the more diverse observed mass ratios of exoplanets, the planets must start accreting gas at different times, and their accretion must be stopped quickly after the beginning of runaway gas accretion (less than 0.5 Myrs), for example via disk dispersal. The evolution of the planets' mass ratio can have an important impact on the dynamics of the system and may constrain the formation history of Jupiter and Saturn.
