Results 41 to 50 of about 48,749 (203)

Stellar and brown dwarf properties from numerical simulations

open access: yes, 2010
We review the statistical properties of stars and brown dwarfs obtained from the first hydrodynamical simulation of star cluster formation to produce more than a thousand stars and brown dwarfs while simultaneously resolving the lowest mass brown dwarfs (
Bate, Matthew R.
core   +1 more source

Searches for brown dwarfs [PDF]

open access: yesInternational Astronomical Union Colloquium, 1994
AbstractThis review attempts a brief summary of the numerous and diverse searches for the so-called brown dwarfs, substellar objects having masses between giant planets and the lowest mass M dwarf stars.
openaire   +1 more source

Simulating Solar Neighborhood Brown Dwarfs. I. The Luminosity Function above and below the Galactic Plane

open access: yesThe Astrophysical Journal
Brown dwarfs form the key, yet poorly understood, link between stellar and planetary astrophysics. These objects offer unique tests of Galactic structure, but observational limitations have inhibited their large-scale analysis to date. Major upcoming sky
Easton J. Honaker, John E. Gizis
doaj   +1 more source

Brown dwarfs forming in discs: Where to look for them?

open access: yesEPJ Web of Conferences, 2011
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 for the existence of planetary-mass objects and for the binary properties ...
Stamatellos D., Whitworth A.
doaj   +1 more source

Newly discovered brown dwarfs not seen in microlensing time scale frequency distribution? [PDF]

open access: yes, 1999
The 2-Micron All Sky Survey (2MASS) (Skrutskie et al. 1997) and the DEep Near Infrared Survey of the southern sky (DENIS) (Epchtein et al. 1997) have revealed a heretofore unknown population of free brown dwarfs that has extended the local mass function ...
S. J. Peale, Zhao H. S., Zhao H. S.
core   +4 more sources

A New Spectral Class of Brown Dwarfs at the Bottom of the IMF in IC 348

open access: yesThe Astrophysical Journal Letters
In a previous study, we used James Webb Space Telescope (JWST) to identify three new brown dwarfs in the center of a nearby star-forming cluster, IC 348.
K. L. Luhman, C. Alves de Oliveira
doaj   +1 more source

Intercomparison of Brown Dwarf Model Grids and Atmospheric Retrieval Using Machine Learning

open access: yesThe Astrophysical Journal, 2023
Understanding differences between substellar spectral data and models has proven to be a major challenge, especially for self-consistent model grids that are necessary for a thorough investigation of brown dwarf atmospheres.
Anna Lueber   +6 more
doaj   +1 more source

MACHOs as brown dwarfs

open access: yes, 1998
Recent observations of microlensing events in the Large Magellanic Cloud suggest that a sizable fraction of the galactic halo is in the form of Massive Astrophysical Compact Halo Objects (MACHOs). Although the average MACHO mass is presently poorly known, the value $\sim 0.1 M_{\odot}$ looks as a realistic estimate, thereby implying that brown dwarfs ...
DE PAOLIS, Francesco   +3 more
openaire   +3 more sources

The brown dwarf population in the Chamaeleon I cloud [PDF]

open access: yes, 2003
We present the results of a multiband survey for brown dwarfs in the Chamaeleon I dark cloud with the Wide Field Imager (WFI) camera at the ESO/MPG 2.2-m telescope on La Silla (Chile).
A. Scholz   +80 more
core   +3 more sources

Diversity of Cold Worlds: A Near-complete Spectral Energy Distribution for 2MASS J04151954−0935066 Using JWST

open access: yesThe Astrophysical Journal
We present a near-complete spectral energy distribution (SED) for an extrasolar world: the T8 brown dwarf 2MASS J04151954−0935066. Spanning from optical to mid-infrared (0.7–20.4 μ m) wavelengths, the SED for this substellar atmosphere is constructed ...
Sherelyn Alejandro Merchan   +27 more
doaj   +1 more source

Home - About - Disclaimer - Privacy