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

arXiv:2609.29365 · astro-ph.SR, astro-ph.EP, astro-ph.GA · Submitted 2026-09-24 · Read on arXiv

astro-ph.SR, astro-ph.EP, astro-ph.GA

Submitted: 2026-09-24

Updated: 2026-09-26

Terminology

• Metallicity — 33× in this paper · explained in 3 episodes
• alpha — 9× in this paper · explained in 1 episode
• Abundance — 4× in this paper · explained in 1 episode
• Adam — 4× in this paper · explained in 2 episodes
• Calibration — 4× in this paper · explained in 7 episodes
• Alignment — 1× in this paper · explained in 1 episode
• Consistency — 1× in this paper · explained in 3 episodes
• Forward modeling — 1× in this paper · explained in 2 episodes
• Low-Resolution Spectrometer — 1× in this paper
• Systematic Bias — 1× in this paper · explained in 3 episodes
• Trace — 1× in this paper · explained in 2 episodes

Sources

• An Ancient Brown Dwarf Transiting a Metal-Poor Thick Disk Star
• The SpeX Prism Library Analysis Toolkit (SPLAT): A Data Curation Model
• The Pan-STARRS1 Surveys
• Euclid Quick Data Release (Q1) -- Data release overview
• JADES: An Abundance of Ultra-Distant T- and Y-Dwarfs in Deep Extragalactic Data
• Simulating Solar Neighborhood Brown Dwarfs I: The Luminosity Function Above and Below the Galactic Plane
• High-Precision Atmospheric Constraints for a Cool T Dwarf from JWST Spectroscopy
• A search for late-type brown dwarfs in the Euclid Quick Data Release 1
• A Comprehensive Atmospheric Retrieval Analysis of 22 James Webb Space Telescope Spectral Energy Distributions of Cool Brown Dwarfs
• Discovery of Seven Cold and Distant Brown Dwarfs with JWST RUBIES
• Wide-Field InfrarRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA 2015 Report

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