论文标题
解释的外部分类的彗星般的尾巴是逃避永久夜间散发出的流出的：日间与夜间逃生
Comet-like tails of disintegrating exoplanets explained by escaping outflows emanated from the permanent nightside: day-side versus night-side escape
论文作者
论文摘要
检测到超热的分解系外行星，尾巴在后面和/或向前射击。据信这些尾巴是由超音速流从地球的重力场逃离的尘埃落的尘埃，从急剧加热的永久性日间逃脱。保护角动量，这一天的逃逸通量将导致行星进入轨道。为了解释观察，辐射压力中的后尾尾巴，将逃逸流从宿主恒星推开的排斥力被认为是必要的。 我们在这里调查是否可以在夜间逃脱，因为压力梯度力偏转了逃逸流。我们在一个理想化的框架中证明，逃离夜间的通量可能会占主导地位。前者可以自然地解释基于角动量保护的常见尾巴，而无需调用辐射压力，以前被认为是关键。我们还发现，日间和夜间逃生通量的分析近似，可以应用于研究瓦解行星的行星演化，并从观察到其灰尘尾巴的性质的观察结果来推断行星大小。
Ultra-hot disintegrating exoplanets have been detected with tails trailing behind and/or shooting ahead of them. These tails are believed to be made of dusts that are carried upward by the supersonic flow escaping the planet's gravity field from the fiercely heated permanent day-side. Conserving angular momentum, this day-side escape flux would lead the planet in orbit. In order to explain the trailing tails in observation, radiation pressure, a repulsive force pushing the escape flow away from the host star is considered to be necessary. We here investigate whether escape could occur on the night-side as the escape flow is deflected by the pressure gradient force. We demonstrate in an idealized framework that escape flux from the night-side could dominate that from the day-side; and the former may naturally explain the commonly-observed trailing tails based on angular momentum conservation, without the need to invoke radiation pressure, which has previously been thought to be the key. We also find analytical approximations for both dayside and nightside escape fluxes, which may be applied to study planetary evolution of disintegrating planets and to infer planetary sizes from observations of the properties of their dusty tails.
