High-Resolution Infrared Spectroscopy of the Brown Dwarf Epsilon Indi Ba
Astrophysics
2009-11-10 v1
Abstract
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.
Keywords
Cite
@article{arxiv.astro-ph/0311237,
title = {High-Resolution Infrared Spectroscopy of the Brown Dwarf Epsilon Indi Ba},
author = {Verne V. Smith and Takashi Tsuji and Kenneth H. Hinkle and Katia Cunha and Robert D. Blum and Jeff A. Valenti and Stephen T. Ridgway and Richard R. Joyce and Peter Bernath},
journal= {arXiv preprint arXiv:astro-ph/0311237},
year = {2009}
}
Comments
9 pages, 3 figures. Astrophysical Journal Letters, in press