Team Deep JWST

Team Resources

Resources

• DAWN JWST Archive: https://dawn-cph.github.io/dja/  

• UCDMCMC fitting code: https://github.com/aburgasser/ucdmcmc  

• SPLAT analysis code: https://github.com/aburgasser/splat 

• TAPS - Evan's & Marylin's analysis code: https://github.com/e-pritchard/TAPS 

Relevant Publications

Imaging discoveries

• Nonino et al. (2023): "Early Results from GLASS-JWST. XIII. A Faint, Distant, and Cold Brown Dwarf"- first detection of a distant brown dwarf in GLASS survey https://ui.adsabs.harvard.edu/abs/2023ApJ...942L..29N/abstract 

• Hainline et al. (2024): "Brown Dwarf Candidates in the JADES and CEERS Extragalactic Surveys"- photometric selection of 21 brown dwarfs in JADES & CEERS surveys https://ui.adsabs.harvard.edu/abs/2024ApJ...964...66H/abstract 

• Holwerda et al. (2024): "Cosmic evolution early release science survey (CEERS): multiclassing galactic dwarf stars in the deep JWST/NIRCam"- photometric selection of M dwarfs in CEERS using kNN machine learning methods https://ui.adsabs.harvard.edu/abs/2024MNRAS.529.1067H/abstract 

• Chen et al. (2025): "Brown dwarf number density in the JWST COSMOS-Web field"- use of photometric selection in COSMOS-Web survey to identify 25 T and Y dwarfs and estimate the space density of brown dwarfs https://ui.adsabs.harvard.edu/abs/2025PASA...42...42C/abstract 

• Hainline et al. (2026): "JADES: An Abundance of Ultra-Distant T- and Y-Dwarfs in Deep Extragalactic Data" - photometric selection and modeling of 41 T & Y dwarf candidates https://ui.adsabs.harvard.edu/abs/2026ApJ..1004..223H/abstract 

• Li et al. (2026): "Two late-T dwarfs at kiloparsec distances revealed by JWST UNCOVER survey" - Two more T dwarfs and an L subdwarf candidates found photometrically in the UNCOVER survey https://ui.adsabs.harvard.edu/abs/2026MNRAS.547ag227L/abstract 

• Morrissey et al. (2026): "Discovery of Seven Cold and Distant Brown Dwarfs with JWST RUBIES" - discovery and model fitting of 7 brown dwarfs in RUBIES data   https://ui.adsabs.harvard.edu/abs/2026AJ....171..191M/abstract 

• NEW Festin et al. (2026): "A Deep Census of Brown Dwarfs in the COSMOS-Web Field" - identification of 76 BD candidates in photometric data from COSMOS field (0.56 deg2) https://ui.adsabs.harvard.edu/abs/2026PASP..138h4402F/abstract 

Spectroscopic discoveries

• Langeroodi & Hjorth (2023): "Little Red Dots or Brown Dwarfs? NIRSpec Discovery of Three Distant Brown Dwarfs Masquerading as NIRCam-selected Highly Reddened Active Galactic Nuclei" - identification of 3 T dwarfs in UNCOVER (same as Burgasser et al. 2024) https://ui.adsabs.harvard.edu/abs/2023ApJ...957L..27L/abstract 

• Burgasser et al. (2024): "UNCOVER: JWST Spectroscopy of Three Cold Brown Dwarfs at Kiloparsec-scale Distances" - 3 distant T dwarfs in UNCOVER survey  https://ui.adsabs.harvard.edu/abs/2024ApJ...962..177B/abstract 

• Hainline et al. (2025): "JADES: Spectroscopic Confirmation and Proper Motion for a T-Dwarf at 2 kpc" - spectroscopic followup of JADES-GS-BD-9 showing it to be a T dwarf at ≈ 2kpc https://ui.adsabs.harvard.edu/abs/2024ApJ...975...31H/abstract 

• Tu et al. (2025): "Three Brown Dwarfs Masquerading as High-redshift Galaxies in JWST Observations"- 3 brown dwarfs in RUBIES survey https://ui.adsabs.harvard.edu/abs/2025ApJ...980..230T/abstract 

• Tu et al. (2025): "A Large Sample of JWST/NIRSpec Brown Dwarfs: New Distant Discoveries" - spectral BDs from the DJA https://ui.adsabs.harvard.edu/abs/2025ApJS..281...49T/abstract 

• NEW Hainline et al. (2026): "JWST/NIRSpec Spectra for Three Ultracool Brown Dwarfs Detected in Extragalactic Surveys: Further Evidence for Phosphine Absorption"- spectroscopic followup of JADES and MoM sources, another potential PH3 detection https://ui.adsabs.harvard.edu/abs/2026arXiv260814786H/abstract 

The Capotauro affair

• Gandolfi et al. (2026): "Mysteries of Capotauro: Investigating the puzzling nature of an extreme F356W-dropout" - A mystery object that might be a very high redshift quasar or a Y-type brown dwarf https://ui.adsabs.harvard.edu/abs/2026A%26A...706A.364G/abstract 

• Liu et al. (2026): "A clear detection of proper motion confirms that the claimed z≈ 32 galaxy candidate, "Capotauro'', is a Y-type brown dwarf" - walks like a duck, must be a duck https://ui.adsabs.harvard.edu/abs/2026arXiv260807461L/abstract 

• Bradac et al. (2026): "Two Exciting High-redshift Galaxy Candidates Turn Out to Be Two Exciting Ultra-cool Brown Dwarfs"- similar case of two moving AGN -->  2 Y dwarfs toward the Bullet Cluster  https://ui.adsabs.harvard.edu/abs/2026arXiv260423668B/abstract 

Other resources

• Merlin et al. (2025): "ASTRODEEP-JWST: NIRCam-HST multi-band photometry and redshifts for half a million sources in six extragalactic deep fields " - photometric catalog for JWST deep fields https://ui.adsabs.harvard.edu/abs/2024A%26A...691A.240M/abstract 

• Pritchard et al. (2026): "JWST/NIRSpec Spectral Standards for M, L, and T Dwarfs and Subdwarfs" - our spectral sample of JWST/NIRSpec spectra! https://ui.adsabs.harvard.edu/abs/2026RNAAS..10..144P/abstract