Results 1 to 10 of about 1,352 (167)
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]
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]
D Homeier, B Freytag
exaly +2 more sources
On the Formation of Brown Dwarfs [PDF]
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]
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
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
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
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
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 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

