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18 papers
A Spitzer Space Telescope Exploration Science Program to Search for Y Dwarf Variability
Michael C. Cushing, Jesica L. Trucks, Kevin K. Hardegree-Ullman +10
We present the results of a Spitzer Space Telescope Exploration Science Program to search for and characterize variability in Y dwarfs. We observed 14 Y dwarfs over a 24 hr period…
JWST 1.5 μm and 4.8 μm Photometry of Y Dwarfs
Loïc Albert, Sandy K. Leggett, Per Calissendorff +20
Brown dwarfs lack nuclear fusion and cool with time; the coldest known have an effective temperature below 500 K, and are known as Y dwarfs. We present a James Webb Space Telescope…
Untangling the Near-IR Spectral Features in the Protoplanetary Environment of KH 15D
Nicole A. Arulanantham, William Herbst, Martha S. Gilmore +2
We report on Gemini/GNIRS observations of the binary T Tauri system V582 Mon (KH 15D) at three orbital phases. These spectra allow us to untangle five components of the system: the…
The Mass-Luminosity Relation in the L/T Transition: Individual Dynamical Masses for the New J-Band Flux Reversal Binary SDSSJ105213.51+442255.7AB
Trent J. Dupuy, Michael C. Liu, S. K. Leggett +3
We have discovered that SDSSJ105213.51+442255.7 (T0.51.0) is a binary in Keck laser guide star adaptive optics imaging, displaying a large J-to-K-band flux reversal (J = -0…
Locating the Trailing Edge of the Circumbinary Ring in the KH 15D System
Holly L. Capelo, William Herbst, S. K. Leggett +2
Following two years of complete occultation of both stars by its opaque circumbinary ring, the binary T Tauri star KH 15D has abruptly brightened again during apastron phases, reac…
Spectroscopic Detection of Carbon Monoxide in Two Late-type T Dwarfs
T. R. Geballe, D. Saumon, D. A. Golimowski +3
M band spectra of two late-type T dwarfs, 2MASS J09373487+2931409, and Gliese 570D, confirm evidence from photometry that photospheric CO is present at abundance levels far in exce…