Results 61 to 70 of about 1,220,192 (373)
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. 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 +4 more
openaire +4 more sources
Brown dwarf populations in open clusters [PDF]
, 2002 We present the results of multiple simulations of open clusters, modelling the dynamics of a population of brown dwarf members. We consider the effects of a large range of primordial binary populations, including the possibilities of having brown dwarf ...
Adams, Tim +3 more
core +3 more sources
The one that got away: a unique eclipse in the young brown dwarf Roque 12
The Open Journal of Astrophysics, 2020 We report the discovery of a deep, singular eclipse of the bona fide brown dwarf Roque 12, a substellar member of the Pleiades. The eclipse was 0.6mag deep, lasted 1.3h, and was observed with two telescopes simultaneously in October 2002.
Aleks Scholz +3 more
doaj +1 more source
The Astronomical Journal, 2023 While secondary mass inferences based on single-lined spectroscopic binary (SB1) solutions are subject to $\sin i$ degeneracies, this degeneracy can be lifted through the observations of eclipses.
Stephen P. Schmidt +20 more
doaj +1 more source
A Surprising Reversal of Temperatures in the Brown-Dwarf Eclipsing Binary 2MASS J05352184-0546085
, 2007 The newly discovered brown-dwarf eclipsing binary 2MASS J05352184-0546085 provides a unique laboratory for testing the predictions of theoretical models of brown-dwarf formation and evolution. The finding that the lower-mass brown dwarf in this system is
Baraffe I. +10 more
core +1 more source
The First Brown Dwarf Discovered by the Backyard Worlds: Planet 9 Citizen Science Project [PDF]
, 2017 The Wide-field Infrared Survey Explorer (WISE) is a powerful tool for finding nearby brown dwarfs and searching for new planets in the outer solar system, especially with the incorporation of NEOWISE and NEOWISE-Reactivation data.
M. Kuchner +11 more
semanticscholar +1 more source
, 1998 After a discussion of the physical processes in brown dwarfs, we present a complete, precise definition of brown dwarfs and of planets inspired by the internal physics of objects between 0.1 and 0.001 M_sun. We discuss observational techniques for characterizing low-luminosity objects as brown dwarfs, including the use of the lithium test and cooling ...
Oppenheimer, Ben R. +2 more
openaire +2 more sources
Surface Gravities for 228 M, L, and T Dwarfs in the NIRSPEC Brown Dwarf Spectroscopic Survey [PDF]
, 2017 We combine 131 new medium-resolution (R ∼ 2000) J-band spectra of M, L, and T dwarfs from the Keck NIRSPEC Brown Dwarf Spectroscopic Survey (BDSS) with 97 previously published BDSS spectra to study surface-gravity-sensitive indices for 228 low-mass stars
E. Martin +11 more
semanticscholar +1 more source
Searches for brown dwarfs [PDF]
International 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 +2 more sources
Parallaxes of Brown Dwarfs at USNO [PDF]
Symposium - International Astronomical Union, 2003 Trigonometric parallaxes have been measured by Dahn et al. (2002) for 28 cool dwarfs and brown dwarfs, including 17 L dwarfs and three T dwarfs. Broadband CCD and near-IR photometry (VRIz*JHK) have been obtained for these objects and for 24 additional late-type dwarfs. These data have been supplemented with astrometry and photometry from the literature,
Richard L. Walker +12 more
openaire +3 more sources