Results 11 to 20 of about 83,683 (249)
The Astronomical Journal, 2023 We present three new brown dwarf spectral-binary candidates: CWISE J072708.09−360729.2, CWISE J103604.84−514424.4, and CWISE J134446.62−732053.9, discovered by citizen scientists through the Backyard Worlds: Planet 9 project.
Alexia Bravo +11 more
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Spectroscopy of Hyades L dwarf candidates★ [PDF]
Monthly Notices of the Royal Astronomical Society, 2014 12 pages, 7 figures, 3 tables; accepted for publication in ...
Lodieu, N., Boudreault, S., Béjar, V.
openaire +3 more sources
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
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K2 Ultracool Dwarfs Survey. I. Photometry of an L Dwarf Superflare [PDF]
The Astrophysical Journal, 2017 Abstract We report on K2 Campaign 8 measurements of a huge white light flare on the L1 dwarf SDSSp J005406.55-003101.8 (EPIC 220186653). The source is a typical L1 dwarf at a distance of ∼50 pc, probably an old hydrogen-burning star rather than a young brown dwarf.
John E. Gizis +4 more
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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
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Monthly Notices of the Royal Astronomical Society, 2008 We present the results of a proper motion survey of the Hyades to search for brown dwarfs, based on UKIDSS and 2MASS data. This survey covers ~275 square degrees to depth of K~15 mag, equivalent to a mass of 0.05 solar masses assuming a cluster age of 625 Myr. The discovery of 12 L dwarf Hyades members is reported.
Hogan, E. +4 more
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Pleiades low-mass brown dwarfs: the cluster L dwarf sequence [PDF]
Astronomy & Astrophysics, 2006 14 pages, 7 figures, accepted for publication in Astronomy and ...
Bihain, G. +7 more
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A Cross-Match of 2MASS and SDSS. II. Peculiar L Dwarfs, Unresolved Binaries, and the Space Density of T Dwarf Secondaries [PDF]
, 2011 We present the completion of a program to cross-correlate the SDSS Data Release 1 and 2MASS Point Source Catalog in search for extremely red L and T dwarfs.
Abazajian +54 more
core +2 more sources
Modeling Brown Dwarfs, L Dwarfs, and T Dwarfs [PDF]
Symposium - International Astronomical Union, 2003 In this contribution, I review a subset of our recent efforts in spectral and opacity modeling aimed at guiding the study of brown dwarfs, L dwarfs, and T dwarfs. I discuss theoretical calculations of the alkali line profiles, newly generated CrH opacities, new evidence for refractory rainout in T dwarfs from optical spectral measurements, and the ...
openaire +2 more sources
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 +73 more
core +6 more sources