Results 31 to 40 of about 22,040,331 (192)
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 COLDEST BROWN DWARF (OR FREE-FLOATING PLANET)?: THE Y DWARF WISE 1828+2650 [PDF]
The Astrophysical Journal, 2013 37 pages, 10 figures, accepted for Astrophysical Journal, Feb ...
Beichman, Charles A. +6 more
openaire +2 more sources
Exploring the Extremes: Characterizing a New Population of Old and Cold Brown Dwarfs
The Astronomical Journal, 2023 Mapping out the populations of thick disk and halo brown dwarfs is important for understanding the metallicity dependence of low-temperature atmospheres and the substellar mass function.
Aaron M. Meisner +5 more
doaj +1 more source
Atmospheric Habitable Zones in Y Dwarf Atmospheres [PDF]
The Astrophysical Journal, 2017 Abstract We use a simple organism lifecycle model to explore the viability of an atmospheric habitable zone (AHZ), with temperatures that could support Earth-centric life, which sits above an environment that does not support life. To illustrate our model, we use a cool Y dwarf atmosphere, such as WISE J085510.83–0714442.5, whose 4.5–5.2
Jack S. Yates +3 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
, 2017 The Sloan Digital Sky Survey has allowed us to increase the number of known white dwarfs by a factor of five and consequently the number of known pulsating white dwarfs also by a factor of five.
Romero Alejandra D., Kepler S.O.
core +4 more sources
Y Gem: A White Dwarf Symbiotic Star?
The Astrophysical Journal, 2022 Abstract In this work we conduct a thorough investigation of the X-ray and ultraviolet (UV) properties of Y Gem based on six archival XMM-Newton and Chandra observations to explore the nature of the system. The results show that Y Gem has strong (1032–34 erg s−1) X-ray emission, including a hard (with a maximum emission temperature of 8 ...
Zhuo-li Yu +4 more
openaire +1 more source
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
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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 +1 more source
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