Review
Nov 2026
The cold substellar frontier in JWST Extragalactic surveys: a robust parallax measurement yields the most distant known ultra-cold Y dwarf
We present an analysis of JADES-GS-BD-5, an extremely cold Y dwarf identified in the JADES/GOODS-South field. Using multi-epoch JWST/NIRCam imaging spanning a $\simeq2$-yr baseline, we calibrate the JWST astrometry and obtain the first robust parallax measurement for a brown dwarf discovered in a JWST extragalactic dee...
F. Liu, D. Mcleod, Xue-Qing Chen et al.
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