3 papers
astro-ph.SR2026
Spitzer + HST parallaxes of 13 late T and Y dwarfs
Federico Marocco, J. Davy Kirkpatrick, Richard L. Smart +13
We present astrometric measurements for 13 cold brown dwarfs in the solar neighborhood (d < 20pc). By combining archival Spitzer data with our own Hubble Space Telescope (HST) obse…
astro-ph.SR2025
J1250+0455AB an ultracool binary in a hierarchical triple system
Sayan Baig, R. L. Smart, Hugh R. A. Jones +7
We report the discovery of the ultracool dwarf binary system J1250+0455AB, a low-mass (M 0.2 M) system in which the components straddle the M/L dwa…
astro-ph.SR2025
Benchmark brown dwarfs -- I. A blue M2 + T5 wide binary and a probable young [M4 + M4] + [T7 + T8] hierarchical quadruple
Z. H. Zhang, F. Navarete, M. C. Galvez-Ortiz +13
Benchmark brown dwarfs in wide binary systems are crucial for characterizing substellar objects and calibrating atmospheric and evolutionary models. However, brown dwarf benchmarks…