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 ...
D. Opitz +5 more
arxiv +13 more sources
The Discovery of Y Dwarfs Using Data from the Wide-field Infrared Survey Explorer (WISE) [PDF]
, 2011 We present the discovery of seven ultracool brown dwarfs identified with the Wide-field Infrared Survey Explorer (WISE). Near-infrared spectroscopy reveals deep absorption bands of H_2O and CH_4 that indicate all seven of the brown dwarfs have spectral types later than UGPS J072227.51-054031.2, the latest type T dwarf currently known.
Michael C. Cushing +15 more
arxiv +10 more sources
SPECTRAL VARIABILITY FROM THE PATCHY ATMOSPHERES OF T AND Y DWARFS [PDF]
The Astrophysical Journal, 2014 Brown dwarfs of a variety of spectral types have been observed to be photometrically variable. Previous studies have focused on objects at the L/T transition, where the iron and silicate clouds in L dwarfs break up or dissipate.
C. Morley +3 more
semanticscholar +8 more sources
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 +4 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 +4 more sources
Y Dwarfs: The Challenge of Discovering the Coldest Substellar Population in the Solar Neighborhood [PDF]
arXiv, 2018 Stars form in the Galaxy with a wide range in mass. If the mass is below 7% of the Sun's, then the object does not become hot enough for stable hydrogen burning. These substellar objects are called brown dwarfs. Maps of the sky at infrared wavelengths have found large numbers of brown dwarfs.
S. K. Leggett
arxiv +6 more sources
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 (six T8-9 and nine Y dwarfs) using the Keck-II telescope, the Spitzer Space Telescope, and the Hubble Space Telescope.
Charles Beichman +7 more
semanticscholar +7 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 small mass ratios (~0.5) compared to previously known field ultracool binaries. Keck/NIRSPEC H-band
Michael C. Liu +4 more
core +6 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
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
core +6 more sources