论文标题
热木星中的热驱动角动量传输
Thermally Driven Angular Momentum Transport in Hot Jupiters
论文作者
论文摘要
我们研究在引力和热强迫的影响下，热木星内部的角动量传输。由于出色的恒星照射，辐射区域在对流区域的顶部发展。内部重力波是在辐射感染边界（RCB）处发射的。热响应是动态的，在角动量转运中起着重要作用。通过分离重力和热强迫术语，我们确定了增加角动量传输的热效应。对于低频（与行星的共旋转框架），潮汐频率（逆行）潮气，角动量通量为正（负）。潮汐相互作用倾向于将行星驱动到同步状态。我们发现，与内重力波相关的角动量转运对RCB和热强迫的穿透深度之间的相对位置非常敏感。如果RCB位于热强迫穿透深度的附近，即使使用幅度较小的热强迫，热驱动的角动量通量可能比引力强迫引起的通量大得多。热增强的扭矩可能会使行星在短达几美元的$ 10^4 $年中将行星驱动到同步状态。
We study the angular momentum transport inside the hot Jupiters under the the influences of gravitational and thermal forcing. Due to the strong stellar irradiation, radiative region develops on top of the convective region. Internal gravity waves are launched at the radiative-convective boundaries (RCBs). The thermal response is dynamical and plays an important role in the angular momentum transport. By separating the gravitational and thermal forcing terms, we identify the thermal effects for increasing the angular momentum transport. For the low frequency (in the co-rotating frame with planets) prograde (retrograde) tidal frequency, the angular momentum flux is positive (negative). The tidal interactions tends to drive the planet to the synchronous state. We find that the angular momentum transport associated with the internal gravity wave is very sensitive to relative position between the RCB and the penetration depth of the thermal forcing. If the RCB is in the vicinity of the thermal forcing penetration depth, even with small amplitude thermal forcing, the thermally driven angular momentum flux could be much larger than the flux induced by gravitational forcing. The thermally enhanced torque could drive the planet to the synchronous state in as short as a few $10^4$ years.
