THE PROPERTIES OF THE 500 K DWARF UGPS J072227.51−054031.2 AND A STUDY OF THE FAR-RED FLUX OF COLD BROWN DWARFS

@article{Leggett2012THEPO,
  title={THE PROPERTIES OF THE 500 K DWARF UGPS J072227.51−054031.2 AND A STUDY OF THE FAR-RED FLUX OF COLD BROWN DWARFS},
  author={Sandy K. Leggett and Didier Saumon and Mark. S. Marley and Katharina Lodders and J. Canty and Philip W. Lucas and Richard L. Smart and Christopher G. Tinney and Derek Homeier and France Allard and Ben Burningham and Avril C. Day-Jones and Bruce Fegley and Miki Ishii and Hugh R. A. Jones and Federico Marocco and David J. Pinfield and Motohide Tamura},
  journal={The Astrophysical Journal},
  year={2012},
  volume={748}
}
We present i and z photometry for 25 T dwarfs and 1 L dwarf. Combined with published photometry, the data show that the i − z, z − Y, and z − J colors of T dwarfs are very red, and continue to increase through to the late-type T dwarfs, with a hint of a saturation for the latest types with Teff ≈ 600 K. We present new 0.7–1.0 μm and 2.8–4.2 μm spectra for the very late type T dwarf UGPS J072227.51−054031.2, as well as improved astrometry for this dwarf. Examination of the spectral energy… 
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TLDR
The substantial increase in the number of known late-type T dwarfs provides a population that will be used to test models of cold atmospheres and star formation and supports the possible re-emergence of clouds after the L/T transition.
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