Hidden water in magma ocean exoplanets
We demonstrate that the deep volatile storage capacity of magma oceans has significant implications for the bulk composition, interior, and climate state inferred from exoplanet mass and radius data. Experimental petrology provides the fundamental properties of the ability of water and melt to mix....
| Những tác giả chính: | , |
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| Định dạng: | Journal article |
| Ngôn ngữ: | English |
| Được phát hành: |
American Astronomical Society
2021
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| _version_ | 1826271903004753920 |
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| author | Dorn, C Lichtenberg, T |
| author_facet | Dorn, C Lichtenberg, T |
| author_sort | Dorn, C |
| collection | OXFORD |
| description | We demonstrate that the deep volatile storage capacity of magma oceans has significant implications for the bulk composition, interior, and climate state inferred from exoplanet mass and radius data. Experimental petrology provides the fundamental properties of the ability of water and melt to mix. So far, these data have been largely neglected for exoplanet mass–radius modeling. Here we present an advanced interior model for water-rich rocky exoplanets. The new model allows us to test the effects of rock melting and the redistribution of water between magma ocean and atmosphere on calculated planet radii. Models with and without rock melting and water partitioning lead to deviations in planet radius of up to 16% for a fixed bulk composition and planet mass. This is within the current accuracy limits for individual systems and statistically testable on a population level. Unrecognized mantle melting and volatile redistribution in retrievals may thus underestimate the inferred planetary bulk water content by up to 1 order of magnitude.
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| first_indexed | 2024-03-06T22:04:03Z |
| format | Journal article |
| id | oxford-uuid:4f8f462f-92cb-405c-ab2c-c30cb5b07c35 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T22:04:03Z |
| publishDate | 2021 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | oxford-uuid:4f8f462f-92cb-405c-ab2c-c30cb5b07c352022-03-26T16:07:57ZHidden water in magma ocean exoplanetsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:4f8f462f-92cb-405c-ab2c-c30cb5b07c35EnglishSymplectic ElementsAmerican Astronomical Society2021Dorn, CLichtenberg, TWe demonstrate that the deep volatile storage capacity of magma oceans has significant implications for the bulk composition, interior, and climate state inferred from exoplanet mass and radius data. Experimental petrology provides the fundamental properties of the ability of water and melt to mix. So far, these data have been largely neglected for exoplanet mass–radius modeling. Here we present an advanced interior model for water-rich rocky exoplanets. The new model allows us to test the effects of rock melting and the redistribution of water between magma ocean and atmosphere on calculated planet radii. Models with and without rock melting and water partitioning lead to deviations in planet radius of up to 16% for a fixed bulk composition and planet mass. This is within the current accuracy limits for individual systems and statistically testable on a population level. Unrecognized mantle melting and volatile redistribution in retrievals may thus underestimate the inferred planetary bulk water content by up to 1 order of magnitude. |
| spellingShingle | Dorn, C Lichtenberg, T Hidden water in magma ocean exoplanets |
| title | Hidden water in magma ocean exoplanets |
| title_full | Hidden water in magma ocean exoplanets |
| title_fullStr | Hidden water in magma ocean exoplanets |
| title_full_unstemmed | Hidden water in magma ocean exoplanets |
| title_short | Hidden water in magma ocean exoplanets |
| title_sort | hidden water in magma ocean exoplanets |
| work_keys_str_mv | AT dornc hiddenwaterinmagmaoceanexoplanets AT lichtenbergt hiddenwaterinmagmaoceanexoplanets |