Spitzer Infrared Spectrograph (IRS) observations of M, L, and T dwarfs

T. L. Roellig; J. E. Van Cleve; G. C. Sloan; J. C. Wilson; D. Saumon; S. K. Leggett; M. S. Marley; M. C. Cushing; J. D. Kirkpatrick; A. K. Mainzer; J. R. Houck

doi:10.1086/421978

Spitzer Infrared Spectrograph (IRS) observations of M, L, and T dwarfs

T. L. Roellig, J. E. Van Cleve, G. C. Sloan, J. C. Wilson, D. Saumon, S. K. Leggett, M. S. Marley, M. C. Cushing, J. D. Kirkpatrick, A. K. Mainzer, J. R. Houck

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Abstract

We present the first mid-infrared spectra of brown dwarfs, together with observations of a low-mass star. Our targets are the M3.5 dwarf GJ 1001A, the L8 dwarf DENIS-P J0255-4700, and the T1/T6 binary system ∈ Indi Ba/Bb. As expected, the mid-infrared spectral morphology of these objects changes rapidly with spectral class because of the changes in atmospheric chemistry resulting from their differing effective temperatures and atmospheric structures. By taking advantage of the unprecedented sensitivity of the Infrared Spectrograph on the Spitzer Space Telescope, we have detected the 7.8 μm methane and 10 μm ammonia bands for the first time in brown dwarf spectra.

Original language	English (US)
Pages (from-to)	418-421
Number of pages	4
Journal	Astrophysical Journal, Supplement Series
Volume	154
Issue number	1
DOIs	https://doi.org/10.1086/421978
State	Published - Sep 2004
Externally published	Yes

Keywords

Infrared: stars
Stars: low-mass, brown dwarfs

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/421978

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title = "Spitzer Infrared Spectrograph (IRS) observations of M, L, and T dwarfs",

abstract = "We present the first mid-infrared spectra of brown dwarfs, together with observations of a low-mass star. Our targets are the M3.5 dwarf GJ 1001A, the L8 dwarf DENIS-P J0255-4700, and the T1/T6 binary system ∈ Indi Ba/Bb. As expected, the mid-infrared spectral morphology of these objects changes rapidly with spectral class because of the changes in atmospheric chemistry resulting from their differing effective temperatures and atmospheric structures. By taking advantage of the unprecedented sensitivity of the Infrared Spectrograph on the Spitzer Space Telescope, we have detected the 7.8 μm methane and 10 μm ammonia bands for the first time in brown dwarf spectra.",

keywords = "Infrared: stars, Stars: low-mass, brown dwarfs",

author = "Roellig, {T. L.} and {Van Cleve}, {J. E.} and Sloan, {G. C.} and Wilson, {J. C.} and D. Saumon and Leggett, {S. K.} and Marley, {M. S.} and Cushing, {M. C.} and Kirkpatrick, {J. D.} and Mainzer, {A. K.} and Houck, {J. R.}",

year = "2004",

month = sep,

doi = "10.1086/421978",

language = "English (US)",

volume = "154",

pages = "418--421",

journal = "Astrophysical Journal, Supplement Series",

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TY - JOUR

T1 - Spitzer Infrared Spectrograph (IRS) observations of M, L, and T dwarfs

AU - Roellig, T. L.

AU - Van Cleve, J. E.

AU - Sloan, G. C.

AU - Wilson, J. C.

AU - Saumon, D.

AU - Leggett, S. K.

AU - Marley, M. S.

AU - Cushing, M. C.

AU - Kirkpatrick, J. D.

AU - Mainzer, A. K.

AU - Houck, J. R.

PY - 2004/9

Y1 - 2004/9

N2 - We present the first mid-infrared spectra of brown dwarfs, together with observations of a low-mass star. Our targets are the M3.5 dwarf GJ 1001A, the L8 dwarf DENIS-P J0255-4700, and the T1/T6 binary system ∈ Indi Ba/Bb. As expected, the mid-infrared spectral morphology of these objects changes rapidly with spectral class because of the changes in atmospheric chemistry resulting from their differing effective temperatures and atmospheric structures. By taking advantage of the unprecedented sensitivity of the Infrared Spectrograph on the Spitzer Space Telescope, we have detected the 7.8 μm methane and 10 μm ammonia bands for the first time in brown dwarf spectra.

AB - We present the first mid-infrared spectra of brown dwarfs, together with observations of a low-mass star. Our targets are the M3.5 dwarf GJ 1001A, the L8 dwarf DENIS-P J0255-4700, and the T1/T6 binary system ∈ Indi Ba/Bb. As expected, the mid-infrared spectral morphology of these objects changes rapidly with spectral class because of the changes in atmospheric chemistry resulting from their differing effective temperatures and atmospheric structures. By taking advantage of the unprecedented sensitivity of the Infrared Spectrograph on the Spitzer Space Telescope, we have detected the 7.8 μm methane and 10 μm ammonia bands for the first time in brown dwarf spectra.

KW - Infrared: stars

KW - Stars: low-mass, brown dwarfs

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U2 - 10.1086/421978

DO - 10.1086/421978

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JO - Astrophysical Journal, Supplement Series

JF - Astrophysical Journal, Supplement Series

IS - 1

ER -

Spitzer Infrared Spectrograph (IRS) observations of M, L, and T dwarfs

Abstract

Keywords

ASJC Scopus subject areas

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