The distance to the cool T9 brown dwarf ULAS J003402.77-005206.7
نویسندگان
چکیده
منابع مشابه
A Spectroscopic Study of Cool, Field Brown Dwarf Neighbors
The Sloan Digital Sky Survey (SDSS), Two Micron Sky Survey (2MASS) and Deep Near Infrared Survey (DENIS) have already found many dozens of brown dwarfs in the late 1990s. Many of the new spectral class of L dwarfs show undepleted lithium, which indicates that their deep interiors are not hot enough to fuse protons. Methane or T dwarfs with surface temperatures near 1,000 K have also been found ...
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An unresolved, likely L dwarf companion to the DA white dwarf GD1400 is reported. This would be only the second such system known, discovered 17 years after the prototype L dwarf, GD165B, was determined to be a companion to a white dwarf. Photometric observations and model predicted stellar parameters of the well studied white dwarf primary indicate that GD1400B has J−K & 2.0 and MK = 12.13 mag...
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Using the Subaru Telescope, we have obtained multiple near-infrared spectra of the cool brown dwarf, SDSS 1624+00 (J162414.37+002915.8), in search of spectral variability in an 80 minute time span. We have found the suspected variability of water vapor absorption throughout the observations, which requires confirmation with a longer time baseline. After coadding the spectra, we have obtained a ...
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Brown dwarfs are commonly regarded as easily-observed templates for exoplanet studies, with comparable masses, physical sizes and atmospheric properties. There is indeed considerable overlap in the photospheric temperatures of the coldest brown dwarfs (spectral classes L and T) and the hottest exoplanets. However, the properties and processes associated with brown dwarf and exoplanet atmosphere...
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We present VLT/NACO SDI images of the very nearby star SCR 1845-6357 (hereafter SCR 1845). SCR 1845 is a recently discovered (Hambly et al. 2004) M8.5 star just 3.5 pc from the sun (Deacon et al. 2005). Using the capabilities of the unique SDI device, we discovered a substellar companion to SCR 1845 at a separation of 4 AU (1.170”±0.003” on the sky, PA=170.20◦±0.13◦) and a ∆F1(1.575 μm) of 3.57...
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ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2010
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200913633