CITATION — REFERENCE ENTRY
A water-rich interior in the temperate sub-Neptune K2-18 b revealed by JWST — arXiv
- Key
- hu2025k218b
- Authors
- Hu, Renyu; Bello-Arufe, Aaron; Tokadjian, Armen; Yang, Jeehyun; Damiano, Mario; Roy, Pierre-Alexis; Coulombe, Louis-Philippe; Madhusudhan, Nikku; Constantinou, Savvas; Benneke, Björn
- Issued
- 2025-7-16
- Type
- article
- Publisher
- arXiv
Raw CSL JSON
{
"DOI": "10.48550/arXiv.2507.12622",
"URL": "https://arxiv.org/abs/2507.12622",
"note": "Preprint; not peer reviewed as of November 2026.",
"type": "article",
"genre": "Preprint",
"title": "A water-rich interior in the temperate sub-Neptune K2-18 b revealed by JWST",
"author": [
{
"given": "Renyu",
"family": "Hu"
},
{
"given": "Aaron",
"family": "Bello-Arufe"
},
{
"given": "Armen",
"family": "Tokadjian"
},
{
"given": "Jeehyun",
"family": "Yang"
},
{
"given": "Mario",
"family": "Damiano"
},
{
"given": "Pierre-Alexis",
"family": "Roy"
},
{
"given": "Louis-Philippe",
"family": "Coulombe"
},
{
"given": "Nikku",
"family": "Madhusudhan"
},
{
"given": "Savvas",
"family": "Constantinou"
},
{
"given": "Björn",
"family": "Benneke"
}
],
"issued": {
"date-parts": [
[
2025,
7,
16
]
]
},
"number": "2507.12622",
"accessed": {
"date-parts": [
[
2026,
11,
6
]
]
},
"publisher": "arXiv"
}
Claims
-
Four new JWST NIRSpec transit observations robustly detect CH4 and CO2 and indicate a water-rich planet. The spectrum contains only marginal DMS signals, below about 2 sigma without a strong haze. Photochemical models show DMS may form without life in massive hydrogen-rich atmospheres of high metallicity.
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