Results 31 to 40 of about 71,825 (285)
NEGLECTED CLOUDS IN T AND Y DWARF ATMOSPHERES [PDF]
The Astrophysical Journal, 2012 17 pages, 12 figures, Accepted for publication in ...
Morley, Caroline V. +5 more
openaire +2 more sources
The Astrophysical Journal Letters, 2023 Cold, substellar objects such as brown dwarfs have long been recognized as contaminants in color-selected samples of active galactic nuclei (AGNs). In particular, their near- to mid-infrared colors (1–5 μ m) can closely resemble the V-shaped ( f _λ ...
Danial Langeroodi, Jens Hjorth
doaj +1 more source
THE COLDEST BROWN DWARF (OR FREE-FLOATING PLANET)?: THE Y DWARF WISE 1828+2650 [PDF]
The Astrophysical Journal, 2013 We have monitored the position of the cool Y dwarf WISEPA J182831.08+265037.8 using a combination of ground- and space-based telescopes and have determined its distance to be 11.2$_{-1.0}^{+1.3}$ pc. Its absolute H magnitude, M$_H=22.21^{+0.25}_{-0.22}$ mag, suggests a mass in the range 0.5-20 M$_{Jup}$ for ages of 0.1-10 Gyr with an effective ...
Beichman, Charles A. +6 more
openaire +2 more sources
Y Dwarf Trigonometric Parallaxes from the Spitzer Space Telescope [PDF]
The Astrophysical Journal, 2018 Abstract Y dwarfs provide a unique opportunity to study free-floating objects with masses <30 M Jup and atmospheric temperatures approaching those of known Jupiter-like exoplanets. Obtaining distances to these objects is an essential step toward characterizing their absolute physical properties.
Emily C. Martin +14 more
openaire +3 more sources
GTC OSIRISz-band imaging of Y dwarfs [PDF]
Astronomy & Astrophysics, 2013 The aim of the project is to contribute to the characterisation of the spectral energy distribution of the coolest brown dwarfs discovered to date, the Y dwarfs. We obtained z-band far-red imaging for six Y dwarfs and a T9+Y0 binary with the OSIRIS (Optical System for Imaging and low Resolution Integrated Spectroscopy) instrument on the 10.4-m Gran ...
Lodieu, N., Bejar, V. J. S., Rebolo, R.
openaire +2 more sources
DEEPz-BAND OBSERVATIONS OF THE COOLEST Y DWARF [PDF]
The Astrophysical Journal, 2014 WISE J085510.83-071442.5 (hereafter, WISE 0855-07) is the coolest Y dwarf known to date and is located at a distance of 2.31$\pm 0.08$ pc, giving it the fourth largest parallax of any known star or brown dwarf system. We report deep $z$-band observations of WISE 0855-07 using FORS2 on UT1/VLT. We do not detect any counterpart to WISE 0855-07 in our $z$-
Taisiya G. Kopytova +9 more
openaire +2 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& ...
Zuckerman, Ben, Song, Inseok
openaire +2 more sources
The ultracool-field dwarf luminosity-function and space density from the Canada-France Brown Dwarf Survey [PDF]
, 2010 Context. Thanks to recent and ongoing large scale surveys, hundreds of brown dwarfs have been discovered in the last decade. The Canada-France Brown Dwarf Survey is a wide-field survey for cool brown dwarfs conducted with the MegaCam camera on the Canada-
Allen +73 more
core +6 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.
Kao, Melodie M. +2 more
openaire +2 more sources
Three New Cool Brown Dwarfs Discovered with the Wide-field Infrared Survey Explorer (WISE) and an Improved Spectrum of the Y0 Dwarf WISE J041022.71+150248.4 [PDF]
, 2014 As part of a larger search of Wide-field Infrared Survey Explorer (WISE) data for cool brown dwarfs with effective temperatures less than 1000 K, we present the discovery of three new cool brown dwarfs with spectral types later than T7.
Cushing, Michael C. +5 more
core +3 more sources