Matches in SemOpenAlex for { <https://semopenalex.org/work/W3008362811> ?p ?o ?g. }
- W3008362811 endingPage "L7" @default.
- W3008362811 startingPage "L7" @default.
- W3008362811 abstract "Exoplanets orbiting M dwarfs present a valuable opportunity for their detection and atmospheric characterisation. This is evident from recent inferences of H$_2$O in such atmospheres, including that of the habitable-zone exoplanet K2-18b. With a bulk density between Earth and Neptune, K2-18b may be expected to possess a H/He envelope. However, the extent of such an envelope and the thermodynamic conditions of the interior remain unexplored. In the present work, we investigate the atmospheric and interior properties of K2-18b based on its bulk properties and its atmospheric transmission spectrum. We constrain the atmosphere to be H$_2$-rich with a H$_2$O volume mixing ratio of $0.02-14.8$%, consistent with previous studies, and find a depletion of CH$_4$ and NH$_3$, indicating chemical disequilibrium. We do not conclusively detect clouds/hazes in the observable atmosphere. We use the bulk parameters and retrieved atmospheric properties to constrain the internal structure and thermodynamic conditions in the planet. The constraints on the interior allow multiple scenarios between rocky worlds with massive H/He envelopes and water worlds with thin envelopes. We constrain the mass fraction of the H/He envelope to be $lesssim 6$%; spanning $lesssim 10^{-5}$ for a predominantly water world to $sim6$% for a pure iron interior. The thermodynamic conditions at the surface of the H$_2$O layer range from the super-critical to liquid phases, with a range of solutions allowing for habitable conditions on K2-18b. Our results demonstrate that the potential for habitable conditions is not necessarily restricted to Earth-like rocky exoplanets." @default.
- W3008362811 created "2020-03-06" @default.
- W3008362811 creator A5017433254 @default.
- W3008362811 creator A5025478984 @default.
- W3008362811 creator A5054340347 @default.
- W3008362811 creator A5071706680 @default.
- W3008362811 creator A5081412389 @default.
- W3008362811 date "2020-02-27" @default.
- W3008362811 modified "2023-09-30" @default.
- W3008362811 title "The Interior and Atmosphere of the Habitable-zone Exoplanet K2-18b" @default.
- W3008362811 cites W1538699814 @default.
- W3008362811 cites W1651468495 @default.
- W3008362811 cites W1653085931 @default.
- W3008362811 cites W1949013791 @default.
- W3008362811 cites W1983956647 @default.
- W3008362811 cites W1990536516 @default.
- W3008362811 cites W1997340896 @default.
- W3008362811 cites W2005561978 @default.
- W3008362811 cites W2015086117 @default.
- W3008362811 cites W2027778800 @default.
- W3008362811 cites W2035697154 @default.
- W3008362811 cites W2049747765 @default.
- W3008362811 cites W2060819359 @default.
- W3008362811 cites W2084064897 @default.
- W3008362811 cites W2085137932 @default.
- W3008362811 cites W2087983709 @default.
- W3008362811 cites W2088227960 @default.
- W3008362811 cites W2088586328 @default.
- W3008362811 cites W2096512653 @default.
- W3008362811 cites W2096611733 @default.
- W3008362811 cites W2105167493 @default.
- W3008362811 cites W2108915436 @default.
- W3008362811 cites W2120931289 @default.
- W3008362811 cites W2126858388 @default.
- W3008362811 cites W2132519231 @default.
- W3008362811 cites W2139679948 @default.
- W3008362811 cites W2157024043 @default.
- W3008362811 cites W2162653031 @default.
- W3008362811 cites W2167076951 @default.
- W3008362811 cites W2294272062 @default.
- W3008362811 cites W2508168437 @default.
- W3008362811 cites W2590741408 @default.
- W3008362811 cites W2605851178 @default.
- W3008362811 cites W2620226170 @default.
- W3008362811 cites W2623072007 @default.
- W3008362811 cites W2734943490 @default.
- W3008362811 cites W2896221505 @default.
- W3008362811 cites W2899002042 @default.
- W3008362811 cites W2936282025 @default.
- W3008362811 cites W2963604282 @default.
- W3008362811 cites W2996056947 @default.
- W3008362811 cites W3098106583 @default.
- W3008362811 cites W3098520665 @default.
- W3008362811 cites W3100756829 @default.
- W3008362811 cites W3101372253 @default.
- W3008362811 cites W3103448631 @default.
- W3008362811 cites W3103623952 @default.
- W3008362811 cites W3103732896 @default.
- W3008362811 cites W3104188978 @default.
- W3008362811 cites W3104637057 @default.
- W3008362811 cites W3104898852 @default.
- W3008362811 cites W3105961396 @default.
- W3008362811 cites W3106145954 @default.
- W3008362811 cites W3106261638 @default.
- W3008362811 cites W3124312923 @default.
- W3008362811 cites W3124369829 @default.
- W3008362811 cites W4300957681 @default.
- W3008362811 doi "https://doi.org/10.3847/2041-8213/ab7229" @default.
- W3008362811 hasPublicationYear "2020" @default.
- W3008362811 type Work @default.
- W3008362811 sameAs 3008362811 @default.
- W3008362811 citedByCount "51" @default.
- W3008362811 countsByYear W30083628112020 @default.
- W3008362811 countsByYear W30083628112021 @default.
- W3008362811 countsByYear W30083628112022 @default.
- W3008362811 countsByYear W30083628112023 @default.
- W3008362811 crossrefType "journal-article" @default.
- W3008362811 hasAuthorship W3008362811A5017433254 @default.
- W3008362811 hasAuthorship W3008362811A5025478984 @default.
- W3008362811 hasAuthorship W3008362811A5054340347 @default.
- W3008362811 hasAuthorship W3008362811A5071706680 @default.
- W3008362811 hasAuthorship W3008362811A5081412389 @default.
- W3008362811 hasBestOaLocation W30083628111 @default.
- W3008362811 hasConcept C121332964 @default.
- W3008362811 hasConcept C1276947 @default.
- W3008362811 hasConcept C129140170 @default.
- W3008362811 hasConcept C150846664 @default.
- W3008362811 hasConcept C163479331 @default.
- W3008362811 hasConcept C200459643 @default.
- W3008362811 hasConcept C41008148 @default.
- W3008362811 hasConcept C44870925 @default.
- W3008362811 hasConcept C51244244 @default.
- W3008362811 hasConcept C51553727 @default.
- W3008362811 hasConcept C554190296 @default.
- W3008362811 hasConcept C65155139 @default.
- W3008362811 hasConcept C65440619 @default.
- W3008362811 hasConcept C68271606 @default.
- W3008362811 hasConcept C76155785 @default.