The First JWST Spectral Energy Distribution of a Y Dwarf [PDF]
The Astrophysical Journal Letters, 2023 We present the first JWST spectral energy distribution of a Y dwarf. This spectral energy distribution of the Y0 dwarf WISE J035934.06−540154.6 consists of low-resolution ( λ /Δ λ ∼100) spectroscopy from 1–12 μ m and three photometric points at 15, 18 ...
Samuel A. Beiler +5 more
doaj +5 more sources
WATER CLOUDS IN Y DWARFS AND EXOPLANETS [PDF]
The Astrophysical Journal, 2014 The formation of clouds affects brown dwarf and planetary atmospheres of nearly all effective temperatures. Iron and silicate condense in L dwarf atmospheres and dissipate at the L/T transition.
Caroline Morley +6 more
core +8 more sources
JWST/NIRCam Discovery of the First Y+Y Brown Dwarf Binary: WISE J033605.05–014350.4 [PDF]
The Astrophysical Journal Letters, 2023 We report the discovery of the first brown dwarf binary system with a Y dwarf primary, WISE J033605.05−014350.4, observed with NIRCam on JWST with the F150W and F480M filters.
Per Calissendorff +27 more
doaj +5 more sources
Outstanding Issues in Our Understanding of L, T, and Y Dwarfs [PDF]
, 2007 Since the discovery of the first L dwarf 19 years ago and the discovery of the first T dwarf 7 years after that, we have amassed a large list of these objects, now numbering almost six hundred.
J. Davy Kirkpatrick
core +7 more sources
JWST 1.5 μm and 4.8 μm Photometry of Y Dwarfs
The Astronomical JournalBrown 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 (JWST) photometric data set of Y dwarfs: 23 were imaged in wide-field ...
Loïc Albert +22 more
doaj +3 more sources
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
Michael C. Liu +4 more
core +6 more sources
Astrometry and Photometry for ≈1000 L, T, and Y Dwarfs from the UKIRT Hemisphere Survey [PDF]
The Astronomical Journal, 2023 We present the positions, proper motions, and near-infrared photometry for 966 known objects with spectral types later than M that were observed as part of the the UKIRT Hemisphere Survey (UHS).
Adam C. Schneider +7 more
doaj +2 more sources
High-precision Atmospheric Characterization of a Y Dwarf with JWST NIRSpec G395H Spectroscopy: Isotopologue, C/O Ratio, Metallicity, and the Abundances of Six Molecular Species [PDF]
The Astronomical JournalThe launch of the James Webb Space Telescope (JWST) marks a pivotal moment for precise atmospheric characterization of Y dwarfs, the coldest brown dwarf spectral type.
Ben W. P. Lew +21 more
doaj +4 more sources
Sub-stellar objects with habitable-zone temperatures: A new search for Y dwarfs in WISE [PDF]
EPJ Web of Conferences, 2013 A method is defined for using the maximum sensitivity of WISE to find late T and Y dwarfs. This requires a WISE detection only in the W2-band and uses the statistical properties of the WISE multi-frame measurements and profile fit photometry to reject ...
Day-Jones Avril +2 more
doaj +2 more sources
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
doaj +2 more sources