Results 11 to 20 of about 71,825 (285)
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.
Fortney, Jonathan J. +6 more
core +4 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 +6 more sources
Discovery of a new Y dwarf: WISE J030449.03-270508.3 [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record [D. J.
Beletsky, Y. +23 more
core +7 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.
Fortney, Jonathan J. +3 more
core +4 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
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
Self-consistent Models of Y Dwarf Atmospheres with Water Clouds and Disequilibrium Chemistry
The Astrophysical Journal, 2023 Y dwarfs are the coolest spectral class of brown dwarf. They have effective temperatures less than 500 K, with the coolest detection as low as ∼250 K.
Brianna Lacy, Adam Burrows
doaj +3 more sources
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-
Faherty, Jacqueline K. +5 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 +2 more sources
Discovery of the Second Y+Y Dwarf Binary System: CWISEP J193518.59-154620.3
The Astrophysical Journal LettersWe present the discovery of a companion to the Y dwarf, CWISEP J193518.59–154620.3, the second Y-Y dwarf binary detected to date. Y dwarfs are the coldest known free-floating objects (
Matthew De Furio +12 more
doaj +3 more sources