Mid-infrared followup of cold brown dwarfs: Diversity in age, mass and metallicity S.K. Leggett, B. Burningham, D. Saumon, M.S. Marley, S.J. Warren, H.R.A. Jones, D.J. Pinfield and R.L. Smart EPJ Web of Conferences, 16 (2011) 06007 Published online: 18 July 2011 DOI: 10.1051/epjconf/20111606007