The 600k T9 dwarfs: Analysis of the spectral energy distributions

S. K. Leggett, Ben Burningham, Michael C. Cushing, M. S. Marley, D. J. Pinfield, D. Saumon, Richard L. Smart, S. J. Warren

Research output: Contribution to journalConference articlepeer-review


We present 8-15 μm spectra of ULAS J003402.77-005206.7, an extremely late-type T dwarf. We fit synthetic spectra to the near-through mid-infrared energy distribution of this dwarf, as well as to the near-infrared spectra of two similar dwarfs, ULAS J133553.45+113005.2 and CFBDS J005910.82-011401.3. The fit to ULAS J133553.45+113005.2 is constrained using midinfrared photometry. We derive effective temperatures of 550-600 K for all three of these T9 dwarfs; ULAS J003402.77-005206.7 appears to be the least massive (5-30 MJup), and CFBDS J005910.82-011401.3 the most massive (30-50 MJup).

Original languageEnglish (US)
Pages (from-to)541-544
Number of pages4
JournalAIP Conference Proceedings
StatePublished - 2009
Externally publishedYes
Event15th Cambridge Workshop on Cool Stars, Stellar Systems and the Sun - St. Andrews, United Kingdom
Duration: Jul 21 2008Jul 25 2008


  • Atmospheres
  • Brown dwarfs
  • Fundamental parameters
  • Low-mass

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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