Time resolved spectroscopy of the variable brown dwarf Kelu-1
Astrophysics
2011-03-10 v1
Abstract
We report the results of observations designed to investigate the spectroscopic signatures of dust clouds on the L2 brown dwarf Kelu-1. Time resolved medium resolution spectra show no significant evidence of variability in the dust sensitive TiO, CrH and FeH bandheads on the timescale of 1--24 hours. We do however report periodic variability in the psuedo-equivelent width of H-alpha consistent with the 1.8 hour rotation period previously reported for this object Clarke, Tinney & Tolley (2002). Near-contemporaneous I-band photometry shows evidence for non-periodic variability at the level of 2%.
Cite
@article{arxiv.astro-ph/0301155,
title = {Time resolved spectroscopy of the variable brown dwarf Kelu-1},
author = {F. J. Clarke and C. G. Tinney and S. T. Hodgkin},
journal= {arXiv preprint arXiv:astro-ph/0301155},
year = {2011}
}
Comments
9 pages, 12 figures. MNRAS in press