Results 51 to 60 of about 15,799,871 (325)
The Viewing Geometry of Brown Dwarfs Influences Their Observed Colors and Variability Amplitudes [PDF]
, 2017 In this paper we study the full sample of known Spitzer [3.6 μm] and J-band variable brown dwarfs. We calculate the rotational velocities, , of 16 variable brown dwarfs using archival Keck NIRSPEC data and compute the inclination angles of 19 variable ...
J. Vos, K. Allers, B. Biller
semanticscholar +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
openaire +6 more sources
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
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 +4 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
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
openaire +5 more sources
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
openaire +5 more sources
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
openaire +5 more sources
A SEARCH FOR L/T TRANSITION DWARFS WITH PAN-STARRS1 AND WISE. II. L/T TRANSITION ATMOSPHERES AND YOUNG DISCOVERIES [PDF]
, 2015 The evolution of brown dwarfs from L to T spectral types is one of the least understood aspects of the ultracool population, partly for lack of a large, well-defined, and well-characterized sample in the L/T transition. To improve the existing census, we
W. Best +15 more
semanticscholar +1 more source
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
openaire +3 more sources