ASpitzerInfrared Spectrograph Spectral Sequence of M, L, and T Dwarfs | Zendy

Michael C. Cushing | Zendy; Thomas L. Roellig | Zendy; Mark S. Marley | Zendy; D. Saumon | Zendy; S. K. Leggett | Zendy; J. Davy Kirkpatrick | Zendy; John C. Wilson | Zendy; G. C. Sloan | Zendy; Amy Mainzer | Zendy; J. E. Van Cleve | Zendy; J. R. Houck | Zendy

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ASpitzerInfrared Spectrograph Spectral Sequence of M, L, and T Dwarfs

Author(s) -

Michael C. Cushing,

Thomas L. Roellig,

Mark S. Marley,

D. Saumon,

S. K. Leggett,

J. Davy Kirkpatrick,

John C. Wilson,

G. C. Sloan,

Amy Mainzer,

J. E. Van Cleve,

J. R. Houck

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/505637

Subject(s) - physics , astrophysics , spectral line , spectrograph , photometry (optics) , population , large magellanic cloud , infrared , spitzer space telescope , flattening , astronomy , telescope , galaxy , stars , demography , sociology

We present the first mid-infrared spectra of brown dwarfs, together withobservations of a low-mass star. Our targets are the M3.5 dwarf GJ 1001A, theL8 dwarf DENIS-P J0255-4700, and the T1/T6 binary system epsilon Indi Ba/Bb. Asexpected, the mid-infrared spectral morphology of these objects changes rapidlywith spectral class due to the changes in atmospheric chemistry resulting fromtheir differing effective temperatures and atmospheric structures. By takingadvantage of the unprecedented sensitivity of the Infrared Spectrograph on theSpitzer Space Telescope we have detected the 7.8 micron methane and 10 micronammonia bands for the first time in brown dwarf spectra.Comment: 4 pages, 2 figure

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