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  Near-perihelion activity of comet 67P/Churyumov–Gerasimenko. A first attempt of non-static analysis

Skorov, Y. V., Keller, H. U., Mottola, S., & Hartogh, P. (2020). Near-perihelion activity of comet 67P/Churyumov–Gerasimenko. A first attempt of non-static analysis. Monthly Notices of the Royal Astronomical Society, 494(3), 3310-3316. doi:10.1093/mnras/staa865.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-6050-3 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-6051-2
Genre: Journal Article

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 Creators:
Skorov, Yuri V.1, Author              
Keller, H U, Author
Mottola, S, Author
Hartogh, Paul1, Author              
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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Free keywords: methods: numerical, comets: general, comets: individual: 67P/Churyumov–Gerasimenko
 MPIS_PROJECTS: ROSETTA: MIRO
 Abstract: The observed rate of water production of comet 67P/Churyumov–Gerasimenko near its perihelion can be approximated by a very steep power function of the heliocentric distance. Widely used thermophysical models based on a static dust layer on top of the icy/refractory matrix are poorly consistent with these observations. We analyse published model results and demonstrate that thermophysical models with a uniform and static ice free layer do not reproduce the observed steep water production rates of 67P near perihelion. Based on transient thermal modeling we conclude that the accelerated gas activity can be explained assuming that the active area fraction near the south pole is increased. The deeper penetration of the heat wave during polar day (no sunset) can activate sublimation through thicker inert dust layers. This can also lead to removal of thicker dust layers and consequently to an expansion of the active area.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1093/mnras/staa865
 Degree: -

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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 494 (3) Sequence Number: - Start / End Page: 3310 - 3316 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150