Results 1 to 10 of about 1,448,608 (292)

Models of Very-Low-Mass Stars, Brown Dwarfs and Exoplanets [PDF]

open access: yesPhilosophical Transactions Series A, Mathematical, Physical, and Engineering Sciences, 2012
Derek Homeier, France Allard
exaly   +2 more sources

Brown dwarf accretion: Nonconventional star formation over very long timescales [PDF]

open access: yesSerbian 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

Redder than Red: Discovery of an Exceptionally Red L/T Transition Dwarf

open access: yesThe Astrophysical Journal Letters, 2023
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

Disks around Young Planetary-mass Objects: Ultradeep Spitzer Imaging of NGC 1333

open access: yesThe Astronomical Journal, 2023
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

Outflows and disks of brown dwarfs with SMA, CARMA and ALMA

open access: yesEPJ Web of Conferences, 2013
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 First Y Dwarf Data from JWST Show that Dynamic and Diabatic Processes Regulate Cold Brown Dwarf Atmospheres

open access: yesThe 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

Extending the Canada-France Brown Dwarf Survey to the near infrared

open access: yesEPJ Web of Conferences, 2011
We present the first results of the Canada-France Brown Dwarfs Survey-InfraRed, hereafter CFBDSIR, our near infrared extension to the optical wide field survey CFBDS.
Bertin E.   +8 more
doaj   +1 more source

Possible nuclear fusion of deuteron in the cores of Earth, Jupiter, Saturn, and brown dwarfs

open access: yesAIP Advances, 2020
Many brown dwarfs have recently been discovered as sub-stellar objects in which deuteron thermonuclear fusion is taking place. Although Jupiter and Saturn emit nearly twice as much heat as they absorb from the Sun, their internal heat-generation ...
Mikio Fukuhara
doaj   +1 more source

SMA and CARMA observations of young brown dwarfs in ρ Ophiuchi and Taurus

open access: yesEPJ Web of Conferences, 2011
Molecular outflows provide vital information about the earliest stages in the birth of stars, studying the molecular outflow properties is therefore crucial for understanding how stars form.
Lee C.-F., Ngoc P.-B., Ho P.
doaj   +1 more source

Unraveling the brown dwarf desert: Four new discoveries and a unifying period-coded picture

open access: yesAstronomy & Astrophysics
We present four newly validated transiting brown dwarfs identified through TESS photometry and confirmed with high-precision radial velocity measurements obtained from the FEROS and PLATOSpec spectrographs.
Šubjak Ján   +32 more
doaj   +1 more source

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