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JWST/NIRSpec Spectra for Three Ultracool Brown Dwarfs Detected in Extragalactic Surveys: Further Evidence for Phosphine Absorption
Kevin N. Hainline, Samuel A. Beiler, Adam J. Burgasser +14
We present JWST NIRSpec prism spectra for three ultracool brown dwarfs discovered in extragalactic survey data, two from the JWST Advanced Deep Extragalactic Survey (JADES), and on…
The Sonora Substellar Atmosphere Models VI. Red Diamondback: Extending Diamondback with SPHINX for Brown Dwarf Early Evolution
C. Evan Davis, Jonathan J. Fortney, Aishwarya Iyer +5
We extend the Sonora Diamondback brown dwarf evolution models to higher effective temperatures to treat the evolution of younger, higher mass objects. Due to an upper temperature l…
JADES: An Abundance of Ultra-Distant T- and Y-Dwarfs in Deep Extragalactic Data
Kevin N. Hainline, Jakob M. Helton, Brittany E. Miles +14
Ultra-cool T- (T 500 - 1200 K) and Y-dwarfs (T K) have historically been found only a few hundred parsecs from the Sun.…
A 1.48-2.48 m R=28000 spectroscopic atlas of the L7.5 and T0.5 components of the nearest pair of brown dwarfs: Luhman 16AB
Hiroyuki Tako Ishikawa, Stanimir Metchev, Megan E. Tannock +6
We present a high signal-to-noise (SNR 450), high-dispersion () H- and K-band spectroscopic atlas of the L7.5 and T0.5 components of the Luhman 1…
Atmospheric abundances and bulk properties of the binary brown dwarf Gliese 229 Bab from JWST/MIRI spectroscopy
Jerry W. Xuan, Marshall D. Perrin, Dimitri Mawet +8
We present JWST/MIRI low-resolution spectroscopy (m) of the first known substellar companion, Gliese 229 Bab, which was recently resolved into a tight binary brown dwarf…
Variable Stars in M31 Stellar Clusters from the Panchromatic Hubble Andromeda Treasury
Richard Smith, Avi Patel, Monika D. Soraisam +9
Variable stars in stellar clusters can offer key constraints on stellar evolution and pulsation models, utilising estimates of host cluster properties to constrain stellar physical…