Results 41 to 50 of about 10,855,464 (193)
L and T dwarfs in the Hyades and Ursa Major moving groups
, 2007 We have used the moving cluster method to identify three L dwarfs and one T dwarf in the Ursa Major/Sirius moving group (age 400 Myr). Five L dwarfs and two T dwarfs are found to belong to the Hyades moving group (age 625 Myr).
N. P. Bannister (7590155) +1 more
core +6 more sources
A Cross‐Match of 2MASS and SDSS: Newly Found L and T Dwarfs and an Estimate of the Space Density of T Dwarfs [PDF]
The Astrophysical Journal, 2008 We report new L and T dwarfs found in a cross-match of the SDSS Data Release 1 and 2MASS. Our simultaneous search of the two databases effectively allows us to relax the criteria for object detection in either survey and to explore the combined databases to a greater completeness level.
Metchev, Stanimir A. +3 more
openaire +3 more sources
Young T-dwarf candidates in IC 348 [PDF]
Astronomy & Astrophysics, 2009 The determination of the lower-end of the initial mass function (IMF) provides strong constraints on star formation theories. We report here on a search for isolated planetary-mass objects in the 3 Myr-old star-forming region IC 348. Deep, narrowband CH4off and CH4on images were obtained with CFHT/WIRCam over 0.11 sq.deg.
Burgess, A. S. M. +5 more
openaire +3 more sources
L-dwarf Detection from SDSS Images using Improved Faster R-CNN
The Astronomical Journal, 2023 We present a data-driven approach to automatically detect L dwarfs from Sloan Digital Sky Survey (SDSS) images using an improved Faster R-CNN framework based on deep learning.
Zhi Cao +6 more
doaj +1 more source
NEGLECTED CLOUDS IN T AND Y DWARF ATMOSPHERES [PDF]
The Astrophysical Journal, 2012 17 pages, 12 figures, Accepted for publication in ...
Morley, Caroline V. +5 more
openaire +2 more sources
Discovery of the Brightest T Dwarf in the Northern Hemisphere [PDF]
The Astrophysical Journal, 2006 4 pages, 3 figures, To be published in November 1, 2006 issue of ApJL.
Artigau, Etienne +5 more
openaire +2 more sources
ULAS J141623.94+134836.3: A BLUE T DWARF COMPANION TO A BLUE L DWARF [PDF]
The Astronomical Journal, 2010 We confirm the substellar nature of ULAS J141623.94+134836.3, a common proper motion companion to the blue L dwarf SDSS J141624.08+134826.7 identified by Burningham et al. and Scholz. Low-resolution 0.8-2.4 micron spectroscopy obtained with IRTF/SpeX shows strong H2O and CH4 absorption bands, consistent with a T7.5 spectral type, and we see possible ...
Burgasser, Adam J. +2 more
openaire +4 more sources
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 ORBIT OF THE L DWARF + T DWARF SPECTRAL BINARY SDSS J080531.84+481233.0* [PDF]
The Astrophysical Journal, 2016 ABSTRACT SDSS J080531.84+481233.0 is a closely separated, very-low-mass (VLM) binary identified through combined-light spectroscopy and confirmed as an astrometric variable. Here we report four years of radial velocity monitoring observations of the system that reveal significant and periodic variability, confirming the binary nature of ...
Adam J. Burgasser +4 more
openaire +3 more sources
M, L and T dwarfs in the J-PLUS Survey
, 2017 A deep and wide sky survey such as J-PLUS will image thousands of M dwarfs, hundreds of L dwarfs, and tens of T dwarfs. M dwarfs are now ideal targets for habitable exoplanet searches, L dwarfs are a main contributor to the mass function in the solar ...
José Antonio Caballero +1 more
core +1 more source