Results 1 to 10 of about 1,352 (167)

Atmospheres of brown dwarfs

open access: yesAstronomy and Astrophysics Review, 2014
Review accepted for publication by The A&A Review (Spinger), 13 Figures, 53 pages, 233 references (Figure 1 updated and typos corrected)
Ch Helling   +2 more
exaly   +5 more sources

The formation mechanism of brown dwarfs [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2002
We present results from the first hydrodynamical star formation calculation to demonstrate that brown dwarfs are a natural and frequent product of the collapse and fragmentation of a turbulent molecular cloud. The brown dwarfs form via the fragmentation of dense molecular gas in unstable multiple systems and are ejected from the dense gas before they ...
Matthew R Bate   +2 more
exaly   +3 more sources

Models of very-low-mass stars, brown dwarfs and exoplanets [PDF]

open access: yesPhilosophical Transactions Series A, Mathematical, Physical, and Engineering Sciences, 2012
D Homeier, B Freytag
exaly   +2 more sources

On the Formation of Brown Dwarfs [PDF]

open access: yesThe Astronomical Journal, 2004
AbstractThe observational properties of brown dwarfs pose challenges to the theory of star formation. Because their masses are much smaller than the typical Jeans mass of interstellar clouds, brown dwarfs are most likely formed through secondary fragmentation processes, rather than through the direct collapse of a molecular cloud core.
Jiang, Ing-Guey   +2 more
openaire   +3 more sources

Brown dwarf accretion: Nonconventional star formation over very long timescales [PDF]

open access: yesSerbian Astronomical Journal, 2005
We investigate the process of accretion of interstellar gas by the Galactic population of brown dwarfs over very long timescales typical for physical eschatology.
Ćirković Milan M.
doaj   +1 more source

Disks around Young Planetary-mass Objects: Ultradeep Spitzer Imaging of NGC 1333

open access: yesThe Astronomical Journal, 2023
We report on a sensitive infrared search for disks around isolated young planetary-mass objects (PMOs) in the NGC 1333 cluster, by stacking 70 Spitzer/IRAC frames at 3.6 and 4.5 μ m.
Aleks Scholz   +4 more
doaj   +1 more source

Redder than Red: Discovery of an Exceptionally Red L/T Transition Dwarf

open access: yesThe Astrophysical Journal Letters, 2023
We present the discovery of CWISE J050626.96+073842.4 (CWISE J0506+0738), an L/T transition dwarf with extremely red near-infrared colors discovered through the Backyard Worlds: Planet 9 citizen science project. Photometry from UKIRT and CatWISE give a (
Adam C. Schneider   +26 more
doaj   +1 more source

An Eccentric Brown Dwarf Eclipsing an M dwarf

open access: yesThe Astronomical Journal, 2022
Abstract We report the discovery of an M = 67 ± 2M J brown dwarf transiting the early M dwarf TOI-2119 on an eccentric orbit (e = 0.3362 ± 0.0005) at an orbital period of 7.200861 ± 0.000005 days. We confirm the brown dwarf nature of the transiting companion using a combination of ground-based and space-based photometry
Caleb I. Cañas   +18 more
openaire   +2 more sources

Outflows and disks of brown dwarfs with SMA, CARMA and ALMA

open access: yesEPJ Web of Conferences, 2013
Brown dwarfs are on the dividing line between planets and stars. Up to date, about 1,000 brown dwarfs, including the coolest known brown dwarfs with temperatures of ∼300 K as cool as the human body, have been discovered.
Tho Do D.   +4 more
doaj   +1 more source

The First Y Dwarf Data from JWST Show that Dynamic and Diabatic Processes Regulate Cold Brown Dwarf Atmospheres

open access: yesThe 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   +1 more source

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