Results 1 to 10 of about 2,436 (245)
JWST 1.5 μm and 4.8 μm Photometry of Y Dwarfs [PDF]
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 +5 more sources
WATER CLOUDS IN Y DWARFS AND EXOPLANETS [PDF]
The Astrophysical Journal, 2014 23 pages, 20 figures, Revised for ...
Morley, Caroline V +6 more
openaire +5 more sources
JWST/NIRCam Discovery of the First Y+Y Brown Dwarf Binary: WISE J033605.05–014350.4
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 +8 more sources
The First JWST Spectral Energy Distribution of a Y Dwarf
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
The Coldest Known Y Dwarfs: Estimates of Their Effective Temperatures
The Astrophysical JournalFor a decade there has been a factor of 2.5 gap in luminosity between the 275 K WISE J085510.83-071442.5 and all other Y dwarfs, with T _eff ≳ 350 K. Recently, three objects were found that may fall in this gap.
S. K. Leggett
doaj +3 more sources
The Astrophysical Journal, 2023 The James Webb Space Telescope (JWST) is now observing Y dwarfs, the coldest known brown dwarfs, with effective temperatures T _eff ≲ 475 K. The first published observations provide important information: not only is the atmospheric chemistry out of ...
S. K. Leggett, Pascal Tremblin
doaj +4 more sources
SEARCHING FOR BINARY Y DWARFS WITH THE GEMINI MULTI-CONJUGATE ADAPTIVE OPTICS SYSTEM (GeMS) [PDF]
The Astrophysical Journal, 2016 ABSTRACT 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-
Daniela Opitz +5 more
core +7 more sources
New Y and T Dwarfs from WISE Identified by Methane Imaging* † [PDF]
The Astrophysical Journal Supplement Series, 2018 Abstract We identify new Y- and T-type brown dwarfs from the WISE All Sky data release using images obtained in filters that divide the traditional near-infrared H and J bands into two halves—specifically and CH4l in the H and J2, and J3 in the J.
C. G. Tinney +8 more
openaire +4 more sources
Optical properties of Y dwarfs observed with the Gran Telescopio Canarias
Astronomy & AstrophysicsAims. Our science goals are to characterise the optical properties of Y dwarfs and to study their consistency with theoretical models. Methods. A sample of five Y dwarfs was observed with three optical and near-infrared instruments at the 10.4m Gran Telescopio Canarias. Deep near-infrared (J- or H-band) and multicolour optical images (ɀ-, i-, r-, 𝑔-, u-
E. L. Martín +5 more
core +4 more sources
Exploration of the Near-infrared Colors of Cold Y Dwarfs from the Ground and Space
The Astrophysical JournalThe James Webb Space Telescope (JWST) has provided critical mid-infrared data for cold brown dwarfs. It has also provided low-resolution near-infrared spectra, and for faint sources these are the first spectra at these wavelengths.
S. K. Leggett +2 more
doaj +3 more sources