The minimum Jeans mass, brown dwarf companion IMF, and predictions for detection of Y-type dwarfs [PDF]
Astronomy & Astrophysics, 2008 Cool L- and T-type objects were discovered first as companions to stars in 1988 and 1995, respectively. A certain example of the yet cooler Y-type spectral class (Teff
B. Zuckerman, Inseok Song
core +6 more sources
Precise Bolometric Luminosities and Effective Temperatures of 23 Late-T and Y Dwarfs Obtained with JWST [PDF]
The Astrophysical JournalWe present infrared spectral energy distributions of 23 late-type T and Y dwarfs obtained with the James Webb Space Telescope. The spectral energy distributions consist of NIRSpec PRISM and MIRI low-resolution spectrometer spectra covering the ∼1–12 μ m ...
Samuel A. Beiler +7 more
doaj +5 more sources
The Diversity of Cold Worlds: A Blended-light Binary Straddling the T/Y Transition in Brown Dwarfs
The Astrophysical JournalWe present the first brown dwarf spectral binary characterized with JWST: WISE J014656.66+423410.0, the coldest blended-light brown dwarf binary straddling the T/Y transition.
Daniella C. Bardalez Gagliuffi +24 more
doaj +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
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 +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 +8 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
Y Dwarf Trigonometric Parallaxes from the Spitzer Space Telescope [PDF]
The Astrophysical Journal, 2018 Y dwarfs provide a unique opportunity to study free-floating objects with masses
Beichman, Charles A. +14 more
core +8 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 +8 more sources
Constraints on magnetospheric radio emission from Y dwarfs [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 Abstract As a pilot study of magnetism in Y dwarfs, we have observed the three known infrared variable Y dwarfs WISE J085510.83−071442.5, WISE J140518.40+553421.4, and WISEP J173835.53+273258.9 with the NSF’s Karl G. Jansky Very Large Array in the 4–8 GHz frequency range.
Melodie M. Kao +2 more
openalex +5 more sources