Results 21 to 30 of about 4,134 (286)
Parallaxes of L and T dwarfs [PDF]
Proceedings of the International Astronomical Union, 2004 We discuss a new program to measure the parallaxes of a number of L and T dwarfs, objects that bridge the gap between M dwarfs and planets. This pilot project tests the feasibility of using large telescopes with infrared detectors to determine parallaxes at the level of milli-arcseconds (mas). First results show that we are able to achieve the required
Coryn A. L. Bailer-Jones +2 more
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[ITAL]L[/ITAL]-Band Photometry of L and T Dwarfs [PDF]
The Astrophysical Journal, 2001 We present K- and L-band photometry obtained with the Keck I telescope for a representative sample of L and T dwarfs. These observations were motivated in part by the dominant role water and methane play in shaping the flux near 2 and 3 microns and by the potential use of these bands as indicators of spectral class in the infrared.
Nancy J. Chanover +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
doaj +1 more source
A SURVEY FOR Hα EMISSION FROM LATE L DWARFS AND T DWARFS* [PDF]
The Astrophysical Journal, 2016 ABSTRACT Recently, studies of brown dwarfs have demonstrated that they possess strong magnetic fields and have the potential to produce radio and optical auroral emissions powered by magnetospheric currents. This emission provides the only window on magnetic fields in the coolest brown dwarfs and identifying additional benchmark objects ...
Pineda, J +5 more
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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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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 ...
S. Boudreault +6 more
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Keck Imaging of Binary L Dwarfs [PDF]
The Astrophysical Journal, 1999 LaTex manuscript in 13 pages, 3 postscript figures, Accepted for publication in the Letters of the Astrophysical Journal; Postscript pre-print version available at: http://www.hep.upenn.edu/PORG/papers/koerner99a ...
Michael W. McElwain +3 more
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Polarization of L Dwarfs by Dust Scattering [PDF]
The Astrophysical Journal, 2005 Latex (aastex sty), 23 pages including 7 postscript figures. Accepted for publication in the Astrophysical Journal (Part 1)
Sengupta, S, Kwok, S
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Dwarf Archives: A Compendium of M, L, and T Dwarf Data [PDF]
AIP Conference Proceedings, 2009 Dwarf Archives is an online archive containing astrometric, photometric, and spectroscopic information for all known L and T dwarfs (over 650 objects), as well as a select sample of over 500 M dwarfs. In this paper, we describe the specific data available in the archive, the interface for searching through it and discuss plans for future updates.
Christopher R. Gelino +3 more
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Constraining the Distribution of L and T Dwarfs in the Galaxy [PDF]
The Astrophysical Journal, 2005 We estimate the thin disk scale height of the Galactic population of L- & T-dwarfs based on star counts from 15 deep parallel fields from the Hubble Space Telescope. From these observations, we have identified 28 candidate L- & T- dwarfs based on their (i'-z') color and morphology.
Nimish P. Hathi +3 more
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