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  The phenomenon of shape evolution from solar-driven outgassing for analogues of small Kuiper belt objects

Zhao, Y., Rezac, L., Skorov, Y. V., & Li, J. Y. (2020). The phenomenon of shape evolution from solar-driven outgassing for analogues of small Kuiper belt objects. Monthly Notices of the Royal Astronomical Society, 492(4), 5152-5166. doi:10.1093/mnras/staa132.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-F534-B Version Permalink: http://hdl.handle.net/21.11116/0000-0006-F535-A
Genre: Journal Article

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Zhao, Y, Author
Rezac, Ladislav1, Author              
Skorov, Yuri V.1, Author              
Li, J. Y., Author
Affiliations:
1Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              

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 Abstract: One of the key findings of the Rosetta mission to the Jupiter -family comet 67P/Cht r nov Gerasimenko was its peculiar hi -lobed shape and its apparent Northern/Southern hemispheric dichotomy in large-scale morphology, This has re -ignited scientific discussions on the topic of the origin, evolution and age of the nucleus. In this work, we conduct a general numerical investigation of the role of solar -driven activity on the overall change in shape. Our goal is to isolate and study the influence of key parameters for solar -driven mass loss, and hopefully to obtain a classification of the final shapes, We consider five general classes of three-dimensional objects for various initial conditions of the spin -axis and orbital parameters, propagating them on different orbits to account for solar-driven CO ice sublimation, We also make a detailed study of the coupling between the sublimation curve and orbital parameters (for CO and 1-1,0 ices). Using the idealizations in this study, we aim to remove the ad hoc assumptions on the source distribution, composition and/or chemical inhomogeneities of the activity, as applied in similar studies that focus on explaining a particular feature or observation. Our numerical experiments show that under no conditions can a homogeneous nucleus with solar driven outgassing produce concave morphology on a convex shape. However, pre-existing concavities can he smoothed/removed for the assumed activity. In summary, the combiupling betweenlar distance, eccentricity, the spin -axis and its orientation, as well as the effects on shadowing and self-heating, do induce morphology changes that might not be deducible without numerical simulations.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/staa132
 Degree: -

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Title: Monthly Notices of the Royal Astronomical Society
  Other : Mon. Not. R. Astron. Soc.
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press
Pages: - Volume / Issue: 492 (4) Sequence Number: - Start / End Page: 5152 - 5166 Identifier: ISSN: 1365-8711
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000024150