2003/01/09 by Fraser Clarke, F. J. Clarke, C. G. Tinney +1 · 1 citation
Chemistry · Physics and Astronomy · #Astrophysics and Star Formation Studies #Spectroscopy and Laser Applications #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.2003.06405.x
published as Mon.Not.Roy.Astron.Soc.341:239,2003 · 9 pages, 12 figures. MNRAS in press
arxiv created 2003/01/09 · openalex publication_date 2003/05/01 · arxiv updated 2011/03/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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 a time-scale of 1–24 h. We do, however, report periodic variability in the pseudo-equivalent width of Hα consistent with the 1.8-h rotation period previously reported for this object. Near-contemporaneous I-band photometry shows evidence for non-periodic variability at the level of 2 per cent.