High-Resolution Infrared Spectroscopy of the Brown Dwarf Epsilon Indi Ba

Details High-Resolution Infrared Spectroscopy of the Brown Dwarf Epsilon Indi Ba High-Resolution Infrared Spectroscopy of the Brown Dwarf Epsilon Indi Ba

2003-11-10

arxiv.org/abs/astro-ph/0311237v1

Astrophys.J. 599 (2003) L107-L110

Astronomy and Astrophysics

Astrophysics

9 pages, 3 figures. Astrophysical Journal Letters, in press

Scientific paper

10.1086/381248

We report on the analysis of high-resolution infrared spectra of the newly discovered brown dwarf Epsilon Indi Ba. This is the closest known brown dwarf to the solar system, with a distance of 3.626 pc. Spectra covering the ranges of 2.308-2.317 microns and 1.553-1.559 microns were observed at a spectral resolution of R=50,000 with the Phoenix spectrometer on the Gemini South telescope. The physical paramters of effective temperature and surface gravity are derived by comparison to model spectra calculated from atmospheres computed using unified cloudy models. An accurate projected rotational velocity is also derived.

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