Atmospheric Parameters of Field L and T Dwarfs [PDF]
, 2007 We present an analysis of the 0.95-14.5 μm spectral energy distributions of nine field ultracool dwarfs with spectral types ranging from L1 to T4.5.
M. Cushing +9 more
semanticscholar +1 more source
Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an Analysis of the Field Substellar Mass Function into the “Planetary” Mass Regime [PDF]
Astrophysical Journal Supplement Series, 2018 We present preliminary trigonometric parallaxes of 184 late-T and Y dwarfs using observations from Spitzer (143), the U.S. Naval Observatory (18), the New Technology Telescope (14), and the United Kingdom Infrared Telescope (9).
J. Kirkpatrick +18 more
semanticscholar +1 more source
Devouring the Milky Way Satellites: Modeling Dwarf Galaxies with Galacticus
The Astrophysical Journal, 2023 Dwarf galaxies are ubiquitous throughout the universe and are extremely sensitive to various forms of internal and external feedback. Over the last two decades, the census of dwarf galaxies in the Local Group and beyond has increased markedly.
Sachi Weerasooriya +4 more
doaj +1 more source
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
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
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
Near-Infrared Photometry and Spectroscopy of L and T Dwarfs: The Effects of Temperature, Clouds, and Gravity [PDF]
, 2004 We present new JHK photometry on the MKO-NIR system and JHK spectroscopy for a large sample of L and T dwarfs. Photometry has been obtained for 71 dwarfs, and spectroscopy for 56.
G. Knapp +29 more
semanticscholar +1 more source
A JWST Survey for Planetary Mass Brown Dwarfs in IC 348
The Astronomical Journal, 2023 We have obtained images of the center of the star-forming cluster IC 348 with the James Webb Space Telescope and have identified brown dwarf candidates based on their photometry and point-like flux profiles. Low-resolution spectroscopy has been performed
K. L. Luhman +7 more
doaj +1 more source
MEETING THE COOL NEIGHBORS. X. ULTRACOOL DWARFS FROM THE 2MASS ALL-SKY DATA RELEASE [PDF]
, 2008 Using data from the 2 Micron All Sky Survey All-Sky Point Source Catalogue, we have extended our census of nearby ultracool dwarfs to cover the full celestial sphere above Galactic latitude of 15°.
I. Neill Reid +7 more
semanticscholar +1 more source
Searching for benchmark systems containing ultra-cool dwarfs and white dwarfs
EPJ Web of Conferences, 2013 We have used the 2MASS all-sky survey and WISE to look for ultracool dwarfs that are part of multiple systems containing main sequence stars. We cross-matched L dwarf candidates from the surveys with Hipparcos and Gliese stars, finding two new systems ...
Pinfield D.J., Gomes J.I.
doaj +1 more source