JWST Observations of the Enigmatic Y-Dwarf WISE 1828+2650. I. Limits to a Binary Companion
The Astrophysical Journal, 2023 The Y-dwarf WISE 1828+2650 is one of the coldest known brown dwarfs with an effective temperature of ∼300 K. Located at a distance of just 10 pc, previous model-based estimates suggest WISE1828+2650 has a mass of ∼5–10 M _J , making it a valuable ...
Matthew De Furio +22 more
doaj +1 more source
Near-infrared Detection of WD 0806-661 B with the Hubble Space Telescope [PDF]
, 2014 WD 0806-661 B is one of the coldest known brown dwarfs (T=300-345 K) based on previous mid-infrared photometry from the Spitzer Space Telescope. In addition, it is a benchmark for testing theoretical models of brown dwarfs because its age and distance ...
A. J. Burgasser +4 more
core +3 more sources
THE FIRST DETECTION OF PHOTOMETRIC VARIABILITY IN A Y DWARF: WISE J140518.39+553421.3 [PDF]
The Astrophysical Journal, 2016 ABSTRACT We present the first detection of the photometric variability in a spectroscopically confirmed Y dwarf. The Infrared Array Camera on board the Spitzer Space Telescope was used to obtain time series photometry of WISE J140518.39+553421.3 at 3.6 and 4.5 μm over a 24-hr period at two different epochs separated by 149 days ...
Michael C. Cushing +10 more
openaire +7 more sources
Multiple Stellar Populations at Less Evolved Stages. III. A Possible Helium Spread in NGC 2210
The Astrophysical Journal, 2023 Helium variations are common features of globular clusters (GCs) with multiple stellar populations. All the formation scenarios predict that secondary population stars are enhanced in helium, but the exact helium content depends on the polluters ...
Chengyuan Li +8 more
doaj +1 more source
A new set of atmosphere and evolution models for cool T–Y brown dwarfs and giant exoplanets [PDF]
Astronomy & Astrophysics, 2020 We present a new set of solar metallicity atmosphere and evolutionary models for very cool brown dwarfs and self-luminous giant exoplanets, which we term ATMO 2020. Atmosphere models are generated with our state-of-the-art 1D radiative-convective equilibrium code ATMO, and are used as surface boundary conditions to calculate the interior structure and ...
Jayesh M. Goyal +13 more
openaire +6 more sources
A uvbyCaHβ CCD Analysis of the Open Cluster Standard, M67, and Its Relation to NGC 752
The Astronomical Journal, 2023 Precision CCD uvbyCa H β photometry is presented of the old cluster, M67, covering one square degree with typical internal precision at the 0.005–0.020 mag level to V ∼ 17.
Bruce A. Twarog +2 more
doaj +1 more source
A wide deep infrared look at the Pleiades with UKIDSS: new constraints on the substellar binary fraction and the low mass IMF [PDF]
, 2007 We present the results of a deep wide-field near-infrared survey of 12 square degrees of the Pleiades conducted as part of the UKIDSS Deep Infrared Sky Survey (UKIDSS) Galactic Cluster Survey (GCS).
Adams +87 more
core +5 more sources
Atmospheric Retrieval Of Cool Y Dwarfs
, 2017 Brown dwarfs' near-infrared spectra contain a wealth of information which can reveal the physical and chemical processes that occur in their atmospheres. Using a recently developed atmospheric retrieval model, we are able to constrain various molecular abundances, along with photometric radius, gravity, cloud optical depths, and temperature profiles ...
Zalesky, Joseph +2 more
openaire +2 more sources
El castillo encantado de Walt Disney
Con A de Animación, 2022 La animación 2D es un terreno fascinante que muestra mundos increíblemente creativos y envuelve una amplia gama de campos profesionales. La arquitectura juega un papel destacado en animación, dando cabida a narrativas mediante todo tipo de complejas ...
Irene Ferrer Rosillo
doaj +1 more source
Discoveries from a Near-infrared Proper Motion Survey using Multi-epoch 2MASS Data [PDF]
, 2010 We have conducted a 4030-square-deg near-infrared proper motion survey using multi-epoch data from the Two Micron All-Sky Survey (2MASS). We find 2778 proper motion candidates, 647 of which are not listed in SIMBAD.
Adam J. Burgasser +85 more
core +3 more sources