3 papers
astro-ph.SR2026
A Comprehensive Atmospheric Retrieval Analysis of 22 James Webb Space Telescope Spectral Energy Distributions of Cool Brown Dwarfs
Harshil Kothari, Michael C. Cushing, Samuel A. Beiler +5
We present a uniform atmospheric retrieval analysis of 22 late-T and Y-type brown dwarfs within 20 pc, observed with the James Webb Space Telescope NIRSpec PRISM and MIRI LRS. This…
astro-ph.EP2024
A Tale of Two Molecules: The Underprediction of CO and Overprediction of PH in Late T and Y Dwarf Atmospheric Models
Samuel A. Beiler, Sagnick Mukherjee, Michael C. Cushing +5
The sensitivity and spectral coverage of JWST is enabling us to test our assumptions of ultracool dwarf atmospheric chemistry, especially with regards to the abundances of phosphin…
astro-ph.SR2024
Probing the Heights and Depths of Y Dwarf Atmospheres: A Retrieval Analysis of the JWST Spectral Energy Distribution of WISE J035934.06540154.6
Harshil Kothari, Michael C. Cushing, Ben Burningham +5
We present an atmospheric retrieval analysis of the Y0 brown dwarf WISE J035934.06540154.6 using the low-resolution 0.96--12 m JWST spectrum presented in \citet{Beiler_2023}…