Abstract The purpose of this paper is to estimate to what temperatures and to what depth the outer layers of the cometary nuclei are heated for several dozen revolutions around the Sun, and what changes in the composition of the volatiles occur in this case. This is important because it is not clear how much the experimentally obtained results on the composition of cometary comes depend on how long the comet is in the current orbit. Our approach to this problem is based on using 3D model of the geometry and dynamics of a cometary nucleus that takes into account the diurnal rotation and orientation of the rotation axis relative to the Sun to simulate the irradiance to take value of temperature the surface of the nucleus and 1D thermal model of the porous ice-rock body. The results of the numerical simulation of heat propagation in the subsurface layers of some points the MA’AT region of the 67P core, obtained for the 20 orbital cycles (close to 130 years), are presented in this paper.

中文翻译：

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120 年来 67P 彗核的热演化：数值模拟

摘要 本文的目的是估计彗核外层围绕太阳旋转几十圈的温度和深度，以及在这种情况下挥发物的成分会发生什么变化。这很重要，因为目前尚不清楚彗星组成的实验结果在多大程度上取决于彗星在当前轨道上的时间。我们解决这个问题的方法是基于使用彗核的几何和动力学的 3D 模型，该模型考虑了日旋转和旋转轴相对于太阳的方向来模拟辐照度，以获取彗核表面的温度值。多孔冰岩体的核和一维热模型。