Burchell, Mark J., Bowden, Stephen A., Cole, Michael, Price, Mark C., Parnell, John (2014) Survival of Organic Materials in Hypervelocity Impacts of Ice on Sand, Ice, and Water in the Laboratory. Astrobiology, 14 (6). pp. 473-485. ISSN 1531-1074. (doi:10.1089/ast.2013.1007) (KAR id:43557)
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Official URL: http://dx.doi.org/10.1089/ast.2013.1007 |
Abstract
The survival of organic molecules in shock impact events has been investigated in the laboratory. A frozen mixture of anthracene and stearic acid, solvated in dimethylsulfoxide (DMSO), was fired in a two-stage light gas gun at speeds of ?2 and ?4?km s?1 at targets that included water ice, water, and sand. This involved shock pressures in the range of 2–12 GPa. It was found that the projectile materials were present in elevated quantities in the targets after impact and in some cases in the crater ejecta as well. For DMSO impacting water at 1.9?km s?1 and 45° incidence, we quantify the surviving fraction after impact as 0.44±0.05. This demonstrates successful transfer of organic compounds from projectile to target in high-speed impacts. The range of impact speeds used covers that involved in impacts of terrestrial meteorites on the Moon, as well as impacts in the outer Solar System on icy bodies such as Pluto. The results provide laboratory evidence that suggests that exogenous delivery of complex organic molecules from icy impactors is a viable source of such material on target bodies.
Item Type: | Article |
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DOI/Identification number: | 10.1089/ast.2013.1007 |
Additional information: | This is a gold open access paper freely available from the journal website |
Uncontrolled keywords: | Organic—Hypervelocity—Shock—Biomarkers |
Subjects: |
Q Science Q Science > QB Astronomy |
Divisions: | Divisions > Division of Natural Sciences > Physics and Astronomy |
Depositing User: | Mark Burchell |
Date Deposited: | 21 Oct 2014 13:57 UTC |
Last Modified: | 10 Dec 2022 22:53 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/43557 (The current URI for this page, for reference purposes) |
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