elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

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.

[img] PDF - Published version
5MB

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

Abstract

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
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Haack, DavidDavid.Haack (at) dlr.deUNSPECIFIED
Kreuzig, ChristopherInstitut fur Geophysik und Extraterrestrische Physik, Technische Universität Braunschweig,Braunschweig, GermanyUNSPECIFIED
Gundlach, B.institut für geophysik und extraterrestrische physik (igep), technische universität braunschweig, mendelssohnstr. 3, 38106 braunschweig, germanyUNSPECIFIED
Blum, J.Technical University, Braunschweig, GermanyUNSPECIFIED
Otto, Katharina A.Katharina.Otto (at) dlr.dehttps://orcid.org/0000-0002-0675-1177
Date:6 September 2021
Journal or Publication Title:Astronomy and Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:653
DOI :10.1051/0004-6361/202142069
Page Range:A153
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:05 Oct 2021 08:03
Last Modified:05 Oct 2021 08:03

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.