Results 31 to 40 of about 15,774,260 (349)
Individual Dynamical Masses of Ultracool Dwarfs [PDF]
, 2017 We present the full results of our decade-long astrometric monitoring programs targeting 31 ultracool binaries with component spectral types M7–T5.
T. Dupuy, Michael C. Liu
semanticscholar +1 more source
A Search for L Dwarf Binary Systems [PDF]
The Astronomical Journal, 2001 We present analysis of HST Planetary Camera images of twenty L dwarfs identified in the course of the Two Micron All-Sky Survey. Four of the targets have faint, red companions at separations between 0.07 and 0.29 arcseconds (1.6 to 7.6 AU). In three cases, the bolometric magnitudes of the components differ by less than 0.3 magnitudes. Since the cooling
Reid, I. Neill +3 more
openaire +2 more sources
Photometry and Proper Motions of M, L, and T Dwarfs from the Pan-STARRS1 3π Survey [PDF]
, 2017 We present a catalog of 9888 M, L and T dwarfs detected in the Pan-STARRS1 3π Survey (PS1), covering three-quarters of the sky. Our catalog contains nearly all known objects of spectral types L0–T2 in the PS1 field, with objects as early as M0 and as ...
W. Best +14 more
semanticscholar +1 more source
Dust in brown dwarfs and extra-solar planets [PDF]
Astronomy & Astrophysics, 2018 Context. The cloud formation process starts with the formation of seed particles, after which, surface chemical reactions grow or erode the cloud particles.
Elspeth K. H. Lee +2 more
semanticscholar +1 more source
Retrieval Study of Brown Dwarfs Across the L-T Sequence
, 2022 A large suite of 228 atmospheric retrievals is performed on a curated sample of 19 brown dwarfs spanning the L0 to T8 spectral types using the open-source Helios-r2 retrieval code, which implements the method of short characteristics for radiative ...
Kitzmann, Daniel +4 more
core +1 more source
L Dwarfs and the Substellar Mass Function [PDF]
The Astrophysical Journal, 1999 This is a pre-published version which is collected from arXiv. The published version is at http://iopscience.iop.org/0004-637X/521/2/613/fulltext.
Reid, I. Neill +10 more
openaire +3 more sources
The Ultracool SpeXtroscopic Survey. I. Volume-limited Spectroscopic Sample and Luminosity Function of M7−L5 Ultracool Dwarfs [PDF]
Astrophysical Journal, 2019 We present a volume-limited, spectroscopically verified sample of M7−L5 ultracool dwarfs (UCDs) within 25 pc. The sample contains 410 sources, of which 93% have trigonometric distance measurements (80% from Gaia DR2) and 81% have low-resolution (R ∼ 120),
Daniella C. Bardalez Gagliuffi +11 more
semanticscholar +1 more source
Massive white dwarfs in $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity
European Physical Journal C: Particles and Fields, 2022 In this work, we investigate the equilibrium configurations of massive white dwarfs (MWD) in the context of modified gravity, namely $$f(\mathtt {R,L_m})$$ f ( R , L m ) gravity, where $$\mathtt {R}$$ R stands for the Ricci scalar and $$\mathtt {L_m}$$ L
R. V. Lobato +3 more
doaj +1 more source
Astronomical Journal, 2020 We present a new volume-limited sample of L0–T8 dwarfs out to 25 pc defined entirely by parallaxes, using our recent measurements from UKIRT/WFCAM along with Gaia DR2 and literature parallaxes. With 369 members, our sample is the largest parallax-defined
W. Best +3 more
semanticscholar +1 more source
Clouds, Brightening and Multiplicity Across the L Dwarf∕T Dwarf Transition [PDF]
AIP Conference Proceedings, 2009 The transition between the two lowest-luminosity spectral classes of brown dwarfs--the L dwarfs and T dwarfs--is traversed by nearly all brown dwarfs as they cool over time. Yet distinct features of this transition, such as the "J-band bump" and an unusually high rate of multiplicity, remain outstanding problems, although evidence points to condensate ...
Adam J. Burgasser, Eric Stempels
openaire +2 more sources