{"schema":"hottub-news/story/v1","story":"st_s2x3qqybbshubxqbwrfq","title":"JWST Observations of the Metal-poor T Dwarf WISEA J155349.96+693355.2: The First Brown Dwarf Associated with the Gaia-Enceladus Milky Way Substructure","title_en":null,"outlets":1,"brief":null,"page":"https://hottub.news/stories/jwst-observations-of-the-metal-poor-t-dwarf-wisea-j155349-96-693355-2-s2x3qqybbs","count":1,"items":[{"id":"n_s2x3qqybbshubxqbwrfq","seq":608211,"kind":"research","title":"JWST Observations of the Metal-poor T Dwarf WISEA J155349.96+693355.2: The First Brown Dwarf Associated with the Gaia-Enceladus Milky Way Substructure","url":"https://arxiv.org/abs/2609.29365","summary":"arXiv:2609.29365v2 Announce Type: replace Abstract: We present JWST NIRSpec and MIRI observations of the metal-poor T dwarf WISEA J155349.96+693355.2. The combined NIRSpec/prism plus MIRI/LRS spectrum (R ~ 100) provides 0.6-12 $\\mu$m spectroscopic coverage that reveals the presence of H$_2$O, CH$_4$, and NH$_3$ absorption features, enhanced collision-induced H$_2$ absorption, and weak or absent CO and CO$_2$ absorption, all indicators of a metal-poor low-temperature…","published":"2026-09-29T04:00:00Z","seen":"2026-09-29T07:46:41Z","lang":"en","source":{"id":"arxiv-astro-ph","name":"arXiv astro-ph (astrophysics)","domain":"arxiv.org","outlet":{"wikidata":"Q118398","name":"arXiv","type":"website","country":"US","designations":["bibliographic database","disciplinary repository","online database","open science tool","preprint server","website"]}},"via":"arxiv-astro-ph","topics":["space","astrophysics","astro-ph.sr","astro-ph.ep","astro-ph.ga"],"authors":["Aaron M. Meisner, Adam J. Burgasser, Chih-Chun Hsu, Sherelyn Alejandro Merchan…"],"entities":[{"id":"Q186447","name":"James Webb Space Telescope","type":"org"},{"id":"Q1752705","name":"Milky Way","type":"place"}],"story":"st_s2x3qqybbshubxqbwrfq","category":"science-technology","category_p":0.7300000190734863,"sentiment":"neutral","tone":0.11999999731779099,"political":0.029999999329447746}]}