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Numerical Simulation of the Long-Term Thermal Evolution of the Nuclei of Short-Period Comets Using the Nucleus of Comet 67P/Churyumov–Gerasimenko as an Example

Dorofeeva, V. A.; Marov, M. Ya.; Rusol, A. V.

Using numerical models, we have studied what depth of the outer layer the comet nuclei are degassed to when they are in orbits whose perihelion is close to the Sun for tens of years. The problem is topical, because it helps to understand how much the experimentally obtained results on the composition of comet comas depend on how long the comet is …

Three-dimensional model of the irradiance of cometary nuclei: Using the nucleus of comet 67P/Churyumov–Gerasimenko as an example

Dorofeeva, V. A.; Marov, M. Ya.; Rusol, A. V.

The goal of this paper is to construct a 3D model of the surface of a cometary nucleus that allows the irradiance nonuniformity and temperature distribution to be investigated. This is very important, because in zones with a maximum surface temperature chemical and physical transformations of material are possible in subsurface layers. We propose …

Formation of cometary nuclei during low-velocity collisions of planetesimals

Zelenyi, L. M.; Ksanfomaliti, L. V.

An investigation of the properties of the 67P/CG nucleus shows convincingly that some of the cometary nuclei resulted from low-velocity collisions of planetesimals. The hypothesis about the origination of a cometary nucleus from colliding bodies has long been known, but it is comet 67P/CG that has imparted topicality to it. In this paper we briefl…