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Ultracool Dwarfs Observed with the Spitzer Infrared Spectrograph. I. An Accurate Look at the L-to-T Transition at 300 Myr from Optical through Mid-infrared Spectrophotometry
Genaro Suárez, Stanimir Metchev, Sandy K. Leggett +2
We present IRS 5--14 m spectra and 16 m and 22 m photometry of the T2.5 companion to the 300 Myr-old G0V star HN Peg. We incorporate previous 0.8--5 m o…
Weather on Other Worlds. VI. Optical Spectrophotometry of Luhman 16B Reveals Large-amplitude Variations in the Alkali Lines
A. N. Heinze, Stanimir Metchev, Radostin Kurtev +1
Using a novel wide-slit, multi-object approach with the GMOS spectrograph on the 8-meter Gemini South telescope, we have obtained precise time-series spectrophotometry of the binar…
Weather on Other Worlds. V. The Three Most Rapidly Rotating Ultra-Cool Dwarfs
Megan E. Tannock, Stanimir Metchev, Aren Heinze +7
We present the discovery of rapid photometric variability in three ultra-cool dwarfs from long-duration monitoring with the Spitzer Space Telescope. The T7, L3.5, and L8 dwarfs hav…