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  Transport Characteristics of the Near-Surface Layer of the Nucleus of Comet 67P/Churyumov–Gerasimenko

Reshetnyk, V., Skorov, Y. V., Vasyuta, M., Bentley, M., Rezac, L., Agarwal, J., et al. (2021). Transport Characteristics of the Near-Surface Layer of the Nucleus of Comet 67P/Churyumov–Gerasimenko. Solar System Research, 55, 106-123. doi:10.1134/S0038094621020040.

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 Creators:
Reshetnyk, V., Author
Skorov, Yuri V.1, Author           
Vasyuta, M., Author
Bentley, M., Author
Rezac, Ladislav1, Author           
Agarwal, Jessica1, Author           
Blum, J., Author
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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Free keywords: comet comet dust coma simulation
 Abstract: The paper considers the free molecular flow of gas through the dusty porous surface layer of a comet nucleus. The study is based on computer models of generation of a porous medium and Knudsen gas diffusion. We consider various types of homogeneous and heterogeneous layers constructed from nonintersecting spheres, including layers that contain microcracks or inner cavities. Using the test-particle method, we quantitatively estimate the free path distribution function, layer permeability, and effective kinetic characteristics of sublimation products passing through a nonisothermal porous layer. In addition, in this approach, we consider the volumetric absorption of visible solar radiation in the near-surface absorbing layer. Simple approximation expressions are obtained for all the transport characteristics under study, which makes it possible to estimate the characteristics with sufficient accuracy for practical applications in the physics of comets. The results will be used to construct new consistent models of energy transfer in the near-surface layer of a comet nucleus and, first of all, to analyze the results of the observations of comet 67P/Churyumov‒Gerasimenko.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Degree: -

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Title: Solar System Research
  Other : Solar Syst. Res.
Source Genre: Journal
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Affiliations:
Publ. Info: New York : Consultants Bureau.
Pages: - Volume / Issue: 55 Sequence Number: - Start / End Page: 106 - 123 Identifier: ISSN: 0038-0946
CoNE: https://pure.mpg.de/cone/journals/resource/958480223880