Results 1 to 10 of about 51,136 (327)
The Formation Mechanism of Brown Dwarfs [PDF]
Monthly 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.
Bate, Matthew R. +2 more
core +4 more sources
Binary brown dwarfs in the Galactic halo? [PDF]
, 1998 Microlensing events towards the Large Magellanic Cloud entail that a sizable fraction of dark matter is in the form of MACHOs (Massive Astrophysical Compact Halo Objects), presumably located in the halo of the Galaxy.
F. De Paolis +3 more
openalex +6 more sources
Brown dwarfs forming in discs: where to look for them? [PDF]
EPJ Web of Conferences, 2009 A large fraction of the observed brown dwarfs may form by gravitational fragmentation of unstable discs. This model reproduces the brown dwarf desert, and provides an explanation the existence of planetary-mass objects and for the binary properties of ...
Stamatellos, Dimitris +1 more
core +4 more sources
Substellar Companions to Main-Sequence Stars: No Brown Dwarf Desert at Wide Separations [PDF]
, 2001 We use three field L and T dwarfs which were discovered to be wide companions to known stars by the Two Micron All-Sky Survey (2MASS) to derive a preliminary brown dwarf companion frequency.
John E. Gizis +6 more
openalex +4 more sources
Exploring brown dwarf disks [PDF]
Astronomy & Astrophysics, 2001 4 pages, 4 figures, A&A Letters in ...
A. Natta, L. Testi
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The Formation of Brown Dwarfs as Ejected Stellar Embryos [PDF]
, 2001 We conjecture that brown dwarfs are substellar objects because they have been ejected from small newborn multiple systems which have decayed in dynamical interactions.
Bo Reipurth, C. J. Clarke
openalex +4 more sources
Pulsating young brown dwarfs [PDF]
Astronomy & Astrophysics, 2005 We present the results of a nonadiabatic, linear stability analysis of models of very low-mass stars (VLMSs) and brown dwarfs (BDs) during the deuterium burning phase in the center.
Angulo +22 more
core +5 more sources
On the Formation of Brown Dwarfs [PDF]
The 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.
Douglas N. C. Lin +2 more
openaire +5 more sources
Brown dwarf accretion: Nonconventional star formation over very long timescales [PDF]
Serbian 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
The formation of brown dwarfs [PDF]
Astronomische Nachrichten, 2005 AbstractWe review four mechanisms for forming brown dwarfs: (i) turbulent fragmentation (producing very low‐mass prestellar cores); (ii) gravitational instabilities in discs; (iii) dynamical ejection of stellar embryos from their placental cores; and (iv) photo‐erosion of pre‐existing cores in HII regions.
Anthony Peter Whitworth +1 more
openaire +4 more sources