论文标题
用柏拉图估算外部行星的光蒸发质量损失
Estimating photoevaporative mass loss of exoplanets with PLATYPOS
论文作者
论文摘要
我们开发了Platypos（Planetary光蒸发模拟器），这是一种Python代码，用于对带有地球样岩石岩心的氢壳信封的近距离行星进行行星光蒸发质量损坏计算。 Platypos以物理和模型参数为输入，可以计算出大气质量损失，并随着时间的推移，行星的半径演变，同时还考虑了热冷却和随后的行星半径演化。特别是，随着时间的推移，我们实施了不同的恒星活动演化轨道。我们的设置允许预测行星是否可以保持其大气的很大一部分或完全蒸发，仅留下裸露的岩石芯。用户提供有关恒星风格系统感兴趣系统的信息，其中包括行星和宿主星参数，以及恒星的旋转，从而演变。此外，可以选择蒸发质量损失率估计的几个细节。这包括高能光子的有效吸收横截面，蒸发效率和流体动力逃逸模型。
We develop PLATYPOS (PLAneTarY PhOtoevaporation Simulator), a python code to perform planetary photoevaporative mass-loss calculations for close-in planets with hydrogen-helium envelopes atop Earth-like rocky cores. With physical and model parameters as input, PLATYPOS calculates the atmospheric mass loss and with it the radius evolution of a planet over time, taking into account also the thermal cooling and subsequent radius evolution of the planet. In particular, we implement different stellar activity evolution tracks over time. Our setup allows for a prediction of whether a planet can hold on to a significant fraction of its atmosphere, or fully evaporates, leaving behind only the bare rocky core. The user supplies information about the star-planet system of interest, which includes planetary and host star parameters, as well as the star's rotational and thus activity evolution. In addition, several details for the evaporative mass-loss rate estimation can be chosen. This includes the effective absorption cross-section for high energy photons, the evaporation efficiency, and the hydrodynamic escape model.
