Results 21 to 30 of about 113,078 (269)
Outstanding Issues in Our Understanding of L, T, and Y Dwarfs
, 2007 11 pages including 5 figures.
J. Davy Kirkpatrick
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NEGLECTED CLOUDS IN T AND Y DWARF ATMOSPHERES [PDF]
The Astrophysical Journal, 2012 17 pages, 12 figures, Accepted for publication in ...
Caroline Morley +5 more
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WISEY DWARFS AS PROBES OF THE BROWN DWARF-EXOPLANET CONNECTION [PDF]
The Astrophysical Journal, 2014 We have determined astrometric positions for 15 WISE-discovered late-type brown dwarfs (6 T8-9 and 9 Y dwarfs) using the Keck II telescope, the Spitzer Space Telescope, and the Hubble Space Telescope. Combining data from 8 to 20 epochs we derive parallactic and proper motions for these objects which put the majority within 15 parsecs.
Charles Beichman +7 more
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ΔY/ΔZfrom the analysis of local K dwarfs [PDF]
Astronomy and Astrophysics, 2010 Accepted for publication in Astronomy & ...
Mario Gennaro +2 more
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An Improved Near-infrared Spectrum of the Archetype Y Dwarf WISEP J182831.08+265037.8 [PDF]
The Astrophysical Journal, 2021 Abstract We present a Hubble Space Telescope/Wide-Field Camera 3 near-infrared spectrum of the archetype Y dwarf WISEP 182831.08+265037.8. The spectrum covers the 0.9–1.7 μm wavelength range at a resolving power of λ/Δλ ≈ 180 and is a significant improvement over the previously published spectrum because it covers a broader wavelength ...
Michael C. Cushing +10 more
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Searching for Binary Y dwarfs with the Gemini Multi-Conjugate Adaptive Optics System (GeMS) [PDF]
The Astrophysical Journal, 2016 The NASA Wide-field Infrared Survey Explorer (WISE) has discovered almost all the known members of the new class of Y-type brown dwarfs. Most of these Y dwarfs have been identified as isolated objects in the field. It is known that binaries with L- and T-type brown dwarf primaries are less prevalent than either M-dwarf or solar-type primaries, they ...
Christopher R. Gelino +6 more
arxiv +7 more sources
The minimum Jeans mass, brown dwarf companion IMF, and predictions for detection of Y-type dwarfs [PDF]
Astronomy & Astrophysics, 2008 6 pages, 2 figures, A& ...
B. Zuckerman, Inseok Song
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The Astrophysical JournalThe sensitivity and spectral coverage of JWST are enabling us to test our assumptions of ultracool dwarf atmospheric chemistry, especially with regards to the abundances of phosphine (PH _3 ) and carbon dioxide (CO _2 ).
Samuel A. Beiler +7 more
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TWO EXTRAORDINARY SUBSTELLAR BINARIES AT THE T/Y TRANSITION AND THEY-BAND FLUXES OF THE COOLEST BROWN DWARFS, [PDF]
The Astrophysical Journal, 2012 Using Keck laser guide star adaptive optics imaging, we have found that the T9 dwarf WISE J1217+1626 and T8 dwarf WISE J1711+3500 are exceptional binaries, with unusually wide separations (~0.8 arcsec, 8-15 AU), large near-IR flux ratios (~2-3 mags), and small mass ratios (~0.5) compared to previously known field ultracool binaries. Keck/NIRSPEC H-band
Michael C. Liu +4 more
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Three Brown Dwarfs Masquerading as High-redshift Galaxies in JWST Observations [PDF]
The Astrophysical JournalWe report the spectroscopic identification of three brown dwarf candidates—o005_s41280, o006_s00089, and o006_s35616—discovered in RUBIES using James Webb Space Telescope (JWST) Near-Infrared Spectrograph PRISM/CLEAR spectroscopy.
Zhijun Tu +3 more
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