We present 2D hydrodynamical simulations of hot Jupiters orbiting near the inner edge of protoplanetary discs. We systemically explore how the accretion rate at the inner disc edge is regulated by a giant planet of different mass, orbital separation and eccentricity. We find that a massive (with planet-to-star mass ratio $\gtrsim 0.003$) eccentric ($e_p\gtrsim 0.1$) planet drives a pulsed accretion at the inner edge of the disc, modulated at one or two times the planet's orbital frequency. The amplitude of accretion variability generally increases with the planet mass and eccentricity, although some non-monotonic dependences are also possible. Applying our simulation results to the T Tauri system CI Tau, where a young hot Jupiter candidate has been detected, we show that the observed luminosity variability in this system can be explained by pulsed accretion driven by an eccentric giant planet.

中文翻译：

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热木星驱动的脉冲盘吸积

我们展示了在原行星盘内边缘附近运行的热木星的二维流体动力学模拟。我们系统地探索了内部圆盘边缘的吸积率如何受到不同质量、轨道间距和离心率的巨行星的调节。我们发现一个巨大的（行星与恒星的质量比为 $\gtrsim 0.003$）偏心（$e_p\gtrsim 0.1$）行星在盘的内边缘驱动脉冲吸积，调制为行星的一到两倍轨道频率。吸积变异的幅度通常随着行星质量和离心率的增加而增加，尽管一些非单调依赖性也是可能的。将我们的模拟结果应用于 T Tauri 系统 CI Tau，在那里检测到一颗年轻的热木星候选者，