Near-Infrared Spectroscopy of the Cool Brown Dwarf, SDSS 1624+00

Details Near-Infrared Spectroscopy of the Cool Brown Dwarf, SDSS 1624+00 Near-Infrared Spectroscopy of the Cool Brown Dwarf, SDSS 1624+00

1999-12-28

arxiv.org/abs/astro-ph/9912530v1

Publ.Astron.Soc.Jap. 52 (2000) 87N

Astronomy and Astrophysics

Astrophysics

6 figures, to appear in PASJ

Scientific paper

Using the Subaru Telescope, we have obtained multiple near-infrared spectra of the cool brown dwarf, SDSS 1624+00, 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 by a longer time baseline. After coadding the spectra, we have obtained a high-quality spectrum covering 1.05 to 1.8 um. Three kinds of spectral indicators, the water vapor bands, methane band, and KI lines in J band, suggest that SDSS 1624+00 is warmer and dustier than Gl 229B.

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