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Akademický článek

JWST Reveals CO Ice, Concentrated CO2 Deposits, and Evidence for Carbonates Potentially Sourced from Ariel’s Interior

Publikováno v: The Astrophysical Journal Letters, Vol 970, Iss 2, p L29 (2024)

The Uranian moon Ariel exhibits a diversity of geologically young landforms, with a surface composition rich in CO _2 ice. The origin of CO _2 and other species, however, remains uncertain. We report observations of Ariel’s leading and trailing hem

Externí odkaz: https://doaj.org/article/c36f1579479842eab17c56f991c68054

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Akademický článek

Revealing Callisto’s Carbon-rich Surface and CO2 Atmosphere with JWST

Publikováno v: The Planetary Science Journal, Vol 5, Iss 3, p 60 (2024)

We analyzed spectral cubes of Callisto’s leading and trailing hemispheres, collected with the NIRSpec Integrated Field Unit (G395H) on the James Webb Space Telescope. These spatially resolved data show strong 4.25 μ m absorption bands resulting fr

Externí odkaz: https://doaj.org/article/e0d789f9fd614e8d8218c301b719ed15

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Akademický článek

Salt Distribution from Freezing Intrusions in Ice Shells on Ocean Worlds: Application to Europa

Autor: Mariam Naseem, Marc Neveu, Samuel Howell, Elodie Lesage, Mohit Melwani Daswani, Steven D. Vance

Publikováno v: The Planetary Science Journal, Vol 4, Iss 9, p 181 (2023)

Several icy moons and dwarf planets appear to have hosted subsurface liquid water. Liquid water intruding upwards into the icy outer shells of these worlds freezes, forming ice and (from ocean solutes) non-ice solids. Here, we model concentrated aque

Externí odkaz: https://doaj.org/article/b0d819cb47ef4b6094046eb7a8d259a2

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Akademický článek

Returning Samples From Enceladus for Life Detection

Autor: Marc Neveu, Ariel D. Anbar, Alfonso F. Davila, Daniel P. Glavin, Shannon M. MacKenzie, Charity M. Phillips-Lander, Brent Sherwood, Yoshinori Takano, Peter Williams, Hajime Yano

Publikováno v: Frontiers in Astronomy and Space Sciences, Vol 7 (2020)

Evidence suggests that Saturn's icy moon Enceladus has a subsurface ocean that sources plumes of water vapor and ice vented to space from its south pole. In situ analyses of this material by the Cassini spacecraft have shown that the ocean contains k

Externí odkaz: https://doaj.org/article/e44f025a0b3a4cdd90dacbe67a667634

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Akademický článek

Response of a stoichiometrically imbalanced ecosystem to manipulation of nutrient supplies and ratios.

Autor: Zarraz M Lee, Laura Steger, Jessica R Corman, Marc Neveu, Amisha T Poret-Peterson, Valeria Souza, James J Elser

Publikováno v: PLoS ONE, Vol 10, Iss 4, p e0123949 (2015)

Cuatro Ciénegas Basin (CCB) is a desert ecosystem that hosts a large diversity of water bodies. Many surface waters in this basin have imbalanced nitrogen (N) to phosphorus (P) stoichiometry (total N:P > 100 by atoms), where P is likely to be a limi

Externí odkaz: https://doaj.org/article/f120201d479e4f489819a9df60be1f6c

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Geophysical and geochemical controls on abiotic carbon cycling on Earth-like planets

Autor: Marc Neveu, Taylor Louanne Che Bartlow, Ryan Felton, Shawn D Domagal-Goldman, Steven Desch

We investigate how variations in a planet’s size and the chemical (mineral) composition of its upper mantle and surface affect processes involved in the carbonate-silicate cycle, which is thought to have regulated the composition of Earth’s atmos

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ef3fe2e9a3ed323b06053343cb31c8d6
https://doi.org/10.22541/essoar.167751627.79222663/v1

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Enceladus as a potential oasis for life: Science goals and investigations for future explorations

Publikováno v: Experimental Astronomy
Experimental Astronomy, Springer Link, 2021, (in press). ⟨10.1007/s10686-021-09808-7⟩

International audience; Enceladus is the first planetary object for which direct sampling of a subsurface water reservoir, likely habitable, has been performed. Over a decade of flybys and seven flythroughs of its watery plume, the Cassini spacecraft

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a9356cde2134aace72dcbea276e4653
https://doi.org/10.1007/s10686-021-09808-7

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