Results 1 to 10 of about 52,935 (203)

Lightning and charge processes in brown dwarf and exoplanet atmospheres [PDF]

Philos Trans A Math Phys Eng Sci, 2019
Christiane Helling, Paul B. Rimmer
openalex   +2 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

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

The 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, Koraljka Muzic, Ray Jayawardhana, Victor Almendros-Abad, Isaac Wilson   +4 more
doaj   +1 more source

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

The 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, Adam J. Burgasser, Justice Bruursema, Jeffrey A. Munn, Frederick J. Vrba, Dan Caselden, Martin Kabatnik, Austin Rothermich, Arttu Sainio, Thomas P. Bickle, Scott E. Dahm, Aaron M. Meisner, J. Davy Kirkpatrick, Genaro Suárez, Jonathan Gagné, Jacqueline K. Faherty, Johanna M. Vos, Marc J. Kuchner, Stephen J. Williams, Daniella Bardalez Gagliuffi, Christian Aganze, Chih-Chun Hsu, Christopher Theissen, Michael C. Cushing, Federico Marocco, Sarah Casewell, The Backyard Worlds: Planet 9 Collaboration   +26 more
doaj   +1 more source

The First Y Dwarf Data from JWST Show that Dynamic and Diabatic Processes Regulate Cold Brown Dwarf Atmospheres

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

The ultracool-field dwarf luminosity-function and space density from the Canada-France Brown Dwarf Survey [PDF]

, 2010
Context. Thanks to recent and ongoing large scale surveys, hundreds of brown dwarfs have been discovered in the last decade. The Canada-France Brown Dwarf Survey is a wide-field survey for cool brown dwarfs conducted with the MegaCam camera on the Canada-
Allen, Basri, Bertin, Bertin, Bouy, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burningham, Burningham, Burningham, C. J. Willott, C. Reylé, Caballero, Chabrier, Chiu, Cruz, Cruz, Dahn, Delfosse, Delorme, Delorme, Drory, E. Artigau, Fan, Felten, Freytag, Fukugita, G. J. Hill, Geballe, Geballe, Gizis, Golimowski, Gould, Joergens, Kirkpatrick, Kirkpatrick, Kirkpatrick, Knapp, L. Albert, L. Malo, Lawrence, Leggett, Luhman, Mancini, Martín, Metchev, Moraux, Nakajima, P. Delorme, Pinfield, R. Doyon, Rebolo, Reid, Robin, Ruiz, Schmidt, Skrutskie, Stauffer, Stobie, T. Forveille, Taylor, Tinney, Tinney, Vrba, Warren, West, Willott, Willott, Willott, X. Delfosse, York   +73 more
core   +6 more sources

A new benchmark T8-9 brown dwarf and a couple of new mid-T dwarfs from the UKIDSS DR5+ LAS [PDF]

, 2010
Benchmark brown dwarfs are those objects for which fiducial constraints are available, including effective temperature, parallax, age, metallicity. We searched for new cool brown dwarfs in 186 sq.deg.
Allard, Allen, Alonso, Artigau, B. Goldman, Baraffe, Bertin, Bessel, Beuzit, Burgasser, Burgasser, Burningham, Burningham, Burrows, Burrows, C. Clemens, Casali, Chiu, Cushing, Cutri, DeGennaro, Del Burgo, Delfosse, Delorme, Ducourant, Faherty, Goldman, Golimowski, Greiner, Greiner, Hambly, Hawley, Heintz, Helling, Helling, Henry, Hewett, Hodgkin, J. Greiner, Jameson, Kirkpatrick, Kirkpatrick, Lawrence, Leggett, Leggett, Leggett, Leggett, Liu, Lodieu, Lodieu, Looper, Luyten, McLean, Montes, Morales, Morel, Nakajima, Nidever, Perryman, Pinfield, Pinfield, Pojmanski, Robin, Ross, S. Marsat, Salim, Saumon, Schwope, Short, Smart, Stephens, Stephens, T. Henning, Tinney, Tinney, Tsuji, Van Leeuwen, Vrba, Warren, West, West, Zuckerman   +81 more
core   +1 more source

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

EPJ 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., Martín Eduardo, Ho Paul, Phan-Bao Ngoc, Lee Chin-Fei   +4 more
doaj   +1 more source

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.
Armitage P. J., Armitage P. J., Bo Reipurth, Boffin H. M. J., Bonnell I. A., Burkert A., Cameron A., Cathie Clarke, Clarke C. J., Clarke C. J., Comeron F., de la Fuente Marcos R., Goldman B., Halbwachs J. L., Hall S. M., Herbig G. H., Kohler R., Kroupa P., Larson R. B., Larson R. B., McDonald J. M., McDonald J. M., Pringle J. E., Reipurth B., Smith K. W., Sterzik M. F., Sterzik M. F., van Albada T. S., Watkins S. J., Watkins S. J.   +29 more
core   +2 more sources

PICASO 3.0: A One-dimensional Climate Model for Giant Planets and Brown Dwarfs

The Astrophysical Journal, 2023
Upcoming James Webb Space Telescope observations will allow us to study exoplanet and brown dwarf atmospheres in great detail. The physical interpretation of these upcoming high signal-to-noise observations requires precise atmospheric models of ...
Sagnick Mukherjee, Natasha E. Batalha, Jonathan J. Fortney, Mark S. Marley   +3 more
doaj   +1 more source