Results 11 to 20 of about 1,398,905 (286)
Brown Dwarf Companions to White Dwarfs [PDF]
AIP Conference Proceedings, 2011 Brown dwarf companions to white dwarfs are rare, but recent infra-red surveys are slowly reveal- ing examples. We present new observations of the post-common envelope binary WD0137-349, which reveals the effects of irradiation on the ~ 0.05M* secondary, and new observations of GD 1400 which show that it too is a close, post-comon envelope system.
Matt R. Burleigh +13 more
core +13 more sources
Binary brown dwarfs in the Galactic halo? [PDF]
Monthly Notices of the Royal Astronomical Society, 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. Within the present uncertainties, brown dwarfs are a viable candidate for MACHOs.
DE PAOLIS, Francesco +3 more
openaire +7 more sources
Three new brown dwarfs and a massive hot Jupiter revealed by TESS around early-type stars [PDF]
, 2022 Context. The detection and characterization of exoplanets and brown dwarfs around massive AF-type stars is essential to investigate and constrain the impact of stellar mass on planet properties.
Kevin I. Collins +100 more
core +1 more source
The formation of brown dwarfs: theory
, 2007 We review five mechanisms for forming brown dwarfs: (1) turbulent fragmentation of molecular clouds, producing very-low-mass prestellar cores by shock compression; (2) collapse and fragmentation of more massive prestellar cores; (3) disk fragmentation ...
Nordlund, Ake +4 more
core +6 more sources
Brown dwarfs and giant exoplanets: bridging observations and theory with statistical methods [PDF]
, 2019 Stellar physics has been widely studied over the last century, with theoretical models for stars robustly tested by decades of observations. In contrast, studies of brown dwarfs and extra-solar giant planets were only possible for the last two decades
Fontanive, Clémence Cécile Pia
core +3 more sources
Constraints on the formation of brown dwarfs by turbulent compression [PDF]
, 2019 We perform radiation hydrodynamical simulations in spherical symmetry in order to investigate the formation of very low mass objects, i.e. brown dwarfs, by external compression.
Inutsuka, Shu-ichiro, Stamer, Torsten
core +1 more source
Atmospheric Modeling of Brown Dwarfs [PDF]
, 2023 Brown dwarfs are celestial bodies outside the solar system that are more massive than planets, but less massive than stars. Since they are less massive than stars, they do not fuse hydrogen in their core, but rather cool slowly over time.
Roberts, Brayden, Lothringer, Joshua
core +1 more source
Stars and brown dwarfs in the [PDF]
, 2012 Context. Although many studies have been performed so far, there are still dozens of low-mass stars and brown dwarfs in the young σ Orionis open cluster without detailed spectroscopic characterisation. Aims.
Cabrera Lavers, A. +7 more
core +1 more source
DA white dwarfs in Sloan Digital Sky Survey Data Release 7 and a search for infrared excess emission [PDF]
, 2011 We present a method which uses colour–colour cuts on the Sloan Digital Sky Survey (SDSS) photometry to select white dwarfs with hydrogen-rich (DA) atmospheres without the recourse to spectroscopy.
Farihi, J. +19 more
core +1 more source
The 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