Low effective ultraviolet exposure ages for organics at the surface of Enceladus
Abstract The saturnian moon Enceladus presents a remarkable opportunity in our solar system for searching for evidence of life, given its habitable ocean and plume that deposits organic-bearing ocean material onto the surface. Organic ocean material could be sampled by a lander mission at Enceladus....
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2023
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Online Access: | https://doi.org/10.1038/s43247-023-01130-8 https://doaj.org/article/ac5d15a06b9b4637b48c658d5292af95 |
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ftdoajarticles:oai:doaj.org/article:ac5d15a06b9b4637b48c658d5292af95 2024-01-28T10:09:13+01:00 Low effective ultraviolet exposure ages for organics at the surface of Enceladus Amanda R. Hendrix Christopher H. House 2023-12-01T00:00:00Z https://doi.org/10.1038/s43247-023-01130-8 https://doaj.org/article/ac5d15a06b9b4637b48c658d5292af95 EN eng Nature Portfolio https://doi.org/10.1038/s43247-023-01130-8 https://doaj.org/toc/2662-4435 doi:10.1038/s43247-023-01130-8 2662-4435 https://doaj.org/article/ac5d15a06b9b4637b48c658d5292af95 Communications Earth & Environment, Vol 4, Iss 1, Pp 1-8 (2023) Geology QE1-996.5 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.1038/s43247-023-01130-8 2023-12-31T01:48:46Z Abstract The saturnian moon Enceladus presents a remarkable opportunity in our solar system for searching for evidence of life, given its habitable ocean and plume that deposits organic-bearing ocean material onto the surface. Organic ocean material could be sampled by a lander mission at Enceladus. It is of interest to understand the amount of relatively pristine, unaltered organics present on the surface, given the ultraviolet (UV) and plasma environment. Here, we investigate UV penetration into Enceladus’s surface and the resultant effective exposure ages for various regions, using the UV reflectance spectrum of Enceladus as measured by the Hubble Space Telescope and considering the rate of resurfacing by plume fallout. In high plume fallout regions near the south pole, plume grains are buried by fresher grains within years, resulting in low levels of exposure to solar UV, which penetrates only ~100 micrometers. Regions at latitudes south of ~40°S can have exposure ages <100 years, translating to relatively high abundances of pristine organic material preserved in the regolith. Article in Journal/Newspaper South pole Directory of Open Access Journals: DOAJ Articles Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) South Pole Communications Earth & Environment 4 1 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 Environmental sciences GE1-350 |
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Geology QE1-996.5 Environmental sciences GE1-350 Amanda R. Hendrix Christopher H. House Low effective ultraviolet exposure ages for organics at the surface of Enceladus |
topic_facet |
Geology QE1-996.5 Environmental sciences GE1-350 |
description |
Abstract The saturnian moon Enceladus presents a remarkable opportunity in our solar system for searching for evidence of life, given its habitable ocean and plume that deposits organic-bearing ocean material onto the surface. Organic ocean material could be sampled by a lander mission at Enceladus. It is of interest to understand the amount of relatively pristine, unaltered organics present on the surface, given the ultraviolet (UV) and plasma environment. Here, we investigate UV penetration into Enceladus’s surface and the resultant effective exposure ages for various regions, using the UV reflectance spectrum of Enceladus as measured by the Hubble Space Telescope and considering the rate of resurfacing by plume fallout. In high plume fallout regions near the south pole, plume grains are buried by fresher grains within years, resulting in low levels of exposure to solar UV, which penetrates only ~100 micrometers. Regions at latitudes south of ~40°S can have exposure ages <100 years, translating to relatively high abundances of pristine organic material preserved in the regolith. |
format |
Article in Journal/Newspaper |
author |
Amanda R. Hendrix Christopher H. House |
author_facet |
Amanda R. Hendrix Christopher H. House |
author_sort |
Amanda R. Hendrix |
title |
Low effective ultraviolet exposure ages for organics at the surface of Enceladus |
title_short |
Low effective ultraviolet exposure ages for organics at the surface of Enceladus |
title_full |
Low effective ultraviolet exposure ages for organics at the surface of Enceladus |
title_fullStr |
Low effective ultraviolet exposure ages for organics at the surface of Enceladus |
title_full_unstemmed |
Low effective ultraviolet exposure ages for organics at the surface of Enceladus |
title_sort |
low effective ultraviolet exposure ages for organics at the surface of enceladus |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s43247-023-01130-8 https://doaj.org/article/ac5d15a06b9b4637b48c658d5292af95 |
long_lat |
ENVELOPE(158.317,158.317,-80.867,-80.867) |
geographic |
Hubble South Pole |
geographic_facet |
Hubble South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Communications Earth & Environment, Vol 4, Iss 1, Pp 1-8 (2023) |
op_relation |
https://doi.org/10.1038/s43247-023-01130-8 https://doaj.org/toc/2662-4435 doi:10.1038/s43247-023-01130-8 2662-4435 https://doaj.org/article/ac5d15a06b9b4637b48c658d5292af95 |
op_doi |
https://doi.org/10.1038/s43247-023-01130-8 |
container_title |
Communications Earth & Environment |
container_volume |
4 |
container_issue |
1 |
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1789338917376360448 |