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Time resolved spectroscopy of the variable brown dwarf Kelu-1 | | F.J. Clarke
; C.G. Tinney
; S.T. Hodgkin
; | | Date: |
9 Dec 2002 | | Journal: | Mon.Not.Roy.Astron.Soc. 341 (2003) 239 | | Subject: | astro-ph | | Affiliation: | ESO/Chile, IoA Cambridge), C.G. Tinney (AAO), S.T. Hodgkin (IoA Cambridge | | 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%. | | Source: | arXiv, astro-ph/0301155 | | Services: | Forum | Review | PDF | Favorites | |
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