THE PHYSICAL PROPERTIES OF FOUR ∼600 K T DWARFS

@article{Leggett2009THEPP,
  title={THE PHYSICAL PROPERTIES OF FOUR ∼600 K T DWARFS},
  author={Sandy K. Leggett and Michael C. Cushing and Didier Saumon and Mark. S. Marley and Thomas L. Roellig and Stephen J. Warren and Ben Burningham and Hugh R. A. Jones and J. Davy Kirkpatrick and Nicholas Lodieu and Philip W. Lucas and Amanda Kathryn Mainzer and E. L. Mart{\'i}n and Mark J. Mccaughrean and David J. Pinfield and G. C. Sloan and Richard L. Smart and Motohide Tamura and Jeffery E. Van Cleve},
  journal={The Astrophysical Journal},
  year={2009},
  volume={695},
  pages={1517 - 1526}
}
We present Spitzer 7.6–14.5 μm spectra of ULAS J003402.77−005206.7 and ULAS J133553.45+113005.2, two T9 dwarfs with the latest spectral types currently known. We fit synthetic spectra and photometry to the near- through mid-infrared energy distributions of these dwarfs and that of the T8 dwarf 2MASS J09393548−2448279. We also analyze near-infrared data for another T9, CFBD J005910.82−011401.3. We find that the ratio of the mid- to near-infrared fluxes is very sensitive to effective temperature… 

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