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Sublimation of organic-rich comet analog materials and their relevance in fracture formation

Haack, David and Kreuzig, Christopher and Gundlach, B. and Blum, J. and Otto, Katharina A. (2021) Sublimation of organic-rich comet analog materials and their relevance in fracture formation. Astronomy and Astrophysics, 653, A153. EDP Sciences. doi: 10.1051/0004-6361/202142069. ISSN 0004-6361.

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Official URL: https://www.aanda.org/articles/aa/abs/2021/09/aa42069-21/aa42069-21.html


Aims. The morphology of cometary nuclei is the result of an ongoing evolution and can provide valuable information to constrain the composition of comets. In our laboratory experiments we investigated the morphological evolution of comet analog materials, which consist of volatile, dust, and organic components. The laboratory results are aimed to help understand the evolution of cometary surfaces. Methods. We used spherical particles of fly ash and mixtures of ice, glycine, and sodium acetate as analog materials in different mass ratios to reproduce observed cometary morphologies. The cohesive and gravitational properties in the laboratory are scaled to cometary conditions to draw meaningful conclusions from the experimental results. The samples were placed in a vacuum sublimation chamber, cooled down to below 150 K, and were insolated with an external light source. To analyze the morphology of the samples, a camera was used to monitor the alterations of the surface. Results. Organic components in volatile-rich samples can have a distinct adhesive effect after the volatiles sublimate. During the sublimation process the sample volume decreases and fractures form on the sample surface. Due to the stability of the remaining volatile-depleted material, significant cliff collapses or ejected particles were not observed in the laboratory.

Item URL in elib:https://elib.dlr.de/144268/
Document Type:Article
Title:Sublimation of organic-rich comet analog materials and their relevance in fracture formation
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Kreuzig, ChristopherInstitut fur Geophysik und Extraterrestrische Physik, Technische Universität Braunschweig,Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Gundlach, B.institut für geophysik und extraterrestrische physik (igep), technische universität braunschweig, mendelssohnstr. 3, 38106 braunschweig, germanyUNSPECIFIEDUNSPECIFIED
Blum, J.Technical University, Braunschweig, GermanyUNSPECIFIEDUNSPECIFIED
Otto, Katharina A.UNSPECIFIEDhttps://orcid.org/0000-0002-0675-1177UNSPECIFIED
Date:6 September 2021
Journal or Publication Title:Astronomy and Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:A153
Publisher:EDP Sciences
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:05 Oct 2021 08:03
Last Modified:05 Oct 2021 08:03

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