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On the possibility of phase separation in the H-He-H2O system in the ice giants

Cano Amoros, Marina and Tosi, Nicola and Nettelmann, Nadine (2022) On the possibility of phase separation in the H-He-H2O system in the ice giants. Europlanet Science Congress 2022, 2022-09-18 - 2022-09-23, Granada, Spain. doi: 10.5194/epsc2022-1209.

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Official URL: https://meetingorganizer.copernicus.org/EPSC2022/EPSC2022-1209.html


Structure models of the interior of gas and ice giants are designed to fit available observational constraints: mass, radius, gravitational field, rotation rate and atmospheric temperature. The outcome of models consists of several layers of different composition - gas, ices and rock [1-4]. Inferring the interior structure requires phase diagrams and equations of state (EoS) of assumed material and mixtures. Discrete layers satisfy constraints on magnetic field, and a sharp boundary between different layers yields the simplest solution to the gravity field [5] and the luminosity of the planet [6] . A possible explanation for discrete layered structures is the immiscibility of major constituents. Studies on Jupiter and Saturn [7-12] suggest H-He phase diagrams agree in predicting demixing of H and He at temperatures of thousand K and pressures of a few Mbar. Bailey & Stevenson 2021 [5] explore possibility of H2-H2O immisicibility and suggest different states of H2-H2O demixing can account for the difference in heat fluxes between Uranus and Neptune. Current experimental data on H2-H2O shows demixing at pressure of a few GPa, where structure models require a change in composition from H-rich to ice-rich. In this work we investigate the possibility of phase separation in the H-He-H2O system in Uranus and Neptune.

Item URL in elib:https://elib.dlr.de/191345/
Document Type:Conference or Workshop Item (Poster)
Title:On the possibility of phase separation in the H-He-H2O system in the ice giants
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Tosi, NicolaUNSPECIFIEDhttps://orcid.org/0000-0002-4912-2848UNSPECIFIED
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:EPSC2022-1209
Series Name:EPSC Abstracts
Keywords:Phase separation, Uranus, Neptune, Hydrogen, Helium, Water
Event Title:Europlanet Science Congress 2022
Event Location:Granada, Spain
Event Type:international Conference
Event Start Date:18 September 2022
Event End Date:23 September 2022
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, R - Planetary Evolution and Life
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Planetary Physics
Deposited By: Cano Amoros, Marina
Deposited On:01 Dec 2022 09:16
Last Modified:24 Apr 2024 20:52

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