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Sublimation of ice-dust mixtures in cooled vacuum environments to reproduce cometary morphologies

Haack, David and Lethuillier, Anthony and Kreuzig, Christopher and Feller, Clement and Gundlach, B. and Pommerol, A. and Blum, J. and Otto, Katharina A. (2021) Sublimation of ice-dust mixtures in cooled vacuum environments to reproduce cometary morphologies. Astronomy & Astrophysics, 649, A35. EDP Sciences. doi: 10.1051/0004-6361/202140435. ISSN 0004-6361.

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Official URL: https://www.aanda.org/articles/aa/abs/2021/05/aa40435-21/aa40435-21.html

Abstract

Aims. The morphology of cometary surfaces can provide important information to constrain the composition and evolution of comets. In this work, we investigate the sublimation behavior of comet analog materials and how the sample composition affects the evolution of morphological features in laboratory experiments. In our experiments, we used dust ice mixtures as analog material to form observed cometary morphologies. Methods. We used ice-dust mixtures in different mixing ratios as cometary analog material. In order to obtain realistic results, we scaled the expected cohesive and gravitational forces on comets to laboratory conditions. The samples were placed in a vacuum sublimation chamber and permanently cooled down to temperatures below 150 K to simulate the space environment. In the experiment, the samples were insolated with a light source from two different directions and alterations on the surface were recorded with a camera. Results. We find that the morphology of sublimation residues of ice-dust mixtures is strongly dependent on the ice-dust ratio as well as the insolation direction. High amounts of ice cause constant surface alteration and lead to exotic morphologies. Low amounts cause fewer and more episodic surface changes during its sublimation. Collapse events resulting in irregular and very rough surfaces occur during horizontal insolation.

Item URL in elib:https://elib.dlr.de/142235/
Document Type:Article
Title:Sublimation of ice-dust mixtures in cooled vacuum environments to reproduce cometary morphologies
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Haack, DavidDavid.Haack (at) dlr.deUNSPECIFIED
Lethuillier, AnthonyInstitut fur Geophysik und Extraterrestrische Physik, Technische Universität Braunschweig,Braunschweig, GermanyUNSPECIFIED
Kreuzig, ChristopherInstitut fur Geophysik und Extraterrestrische Physik, Technische Universität Braunschweig,Braunschweig, GermanyUNSPECIFIED
Feller, ClementPhysikalisches Institut, Universität Bern, Bernn SwitzerlandUNSPECIFIED
Gundlach, B.institut für geophysik und extraterrestrische physik (igep), technische universität braunschweig, mendelssohnstr. 3, 38106 braunschweig, germanyUNSPECIFIED
Pommerol, A.Physikalisches Institut, Sidlerstr. 5, University of Bern, 3012 Bern, SwitzerlanUNSPECIFIED
Blum, J.Institut für Geophysik und extraterrestrische Physik (IGEP), Technische Universität Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, GermanyUNSPECIFIED
Otto, Katharina A.Katharina.Otto (at) dlr.dehttps://orcid.org/0000-0002-0675-1177
Date:7 May 2021
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:649
DOI :10.1051/0004-6361/202140435
Page Range:A35
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:comets: general – methods: laboratory: solid state – planets and satellites: formation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Exploration of the Solar System
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Geology
Deposited By: Haack, David
Deposited On:12 May 2021 08:03
Last Modified:12 May 2021 08:03

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