Browsing by Author "Marley, M."

Now showing items 1-5 of 5

    • Mid-infrared photometry of cold brown dwarfs : diversity in age, mass and metallicity 

      Leggett, S.K.; Burningham, B.; Saumon, D.; Marley, M.; Warren, S.J.; Smart, R.L.; Jones, H.R.A.; Lucas, P.W.; Pinfield, D.J.; Tamura, M. (2010)
      We present new Spitzer Infrared Array Camera (IRAC) photometry of 12 very late-type T dwarfs: nine have [3.6], [4.5], [5.8], and [8.0] photometry and three have [3.6] and [4.5] photometry only. Combining this with previously ...

    • The physical properties of four ~600 K T dwarfs 

      Leggett, S.K.; Cushing, M.C.; Saumon, D.; Marley, M.; Roellig, T.L.; Warren, S.J.; Burningham, B.; Jones, H.R.A.; Kirkpatrick, J.D.; Lodieu, N.; Lucas, P.W.; Mainzer, A.K.; Martin, E.L.; McCaughrean, M.J.; Pinfield, D.J.; Sloan, G.C.; Smart, R.L.; Tamura, M.; Van Cleve, J. (2009)
      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 ...

    • The Properties of the 500 K Dwarf UGPS J072227.51-054031.2, and a Study of the Far-Red Flux of Cold Brown Dwarfs 

      Leggett, S.; Saumon, D.; Marley, M.; Lodders, K.; Canty, J.; Lucas, P.W.; Smart, R.; Tinney, C.; Homeier, D.; Allard, F.; Burningham, B.; Day-Jones, A.; Fegley, B.; Ishii, Miki; Jones, H.R.A.; Marocco, F.; Pinfield, D.J.; Tamura, M. (2012-04-01)
      We present i and z photometry for 25 T dwarfs and one 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 ...

    • Properties of the Coolest Dwarfs 

      Leggett, S.K.; Freedman, R.; Geballe, T.; Golimowski, D.; Lodieu, N.; Marley, M.; Pinfield, D.J.; Saumon, D.; Stephens, D.; Warren, S.J. (Astronomical Society of the Pacific, 2008)
      Eleven years after the discovery of the first T dwarf, a population of ultracool L and T dwarfs has been identified that is large enough to show a range of atmospheric properties. Also, model atmospheres are sufficiently ...

    • Properties of the T8.5 dwarf Wolf 940 B 

      Leggett, S.K.; Saumon, D.; Burningham, B.; Cushing, M.C.; Marley, M.; Pinfield, D.J. (2010)
      We present 7.5-14.2 μm low-resolution spectroscopy, obtained with the Spitzer Infrared Spectrograph, of the T8.5 dwarf Wolf 940 B, which is a companion to an M4 dwarf with a projected separation of 400 AU. We combine these ...