The disk fractions of brown dwarfs in IC 348 and Chamaeleon

K. L. Luhman; C. J. Lada; L. Hartmann; A. A. Muench; S. T. Megeath; L. E. Allen; P. C. Myers; J. Muzerolle; E. Young; G. G. Fazio

doi:10.1086/497031

The disk fractions of brown dwarfs in IC 348 and Chamaeleon

K. L. Luhman, C. J. Lada, L. Hartmann, A. A. Muench, S. T. Megeath, L. E. Allen, P. C. Myers, J. Muzerolle, E. Young, G. G. Fazio

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Abstract

Using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope, we have obtained mid-infrared photometry for 25 and 18 low-mass members of the IC 348 and Chamaeleon I star-forming clusters, respectively (>M6, M ≲ 0.08 M_⊙). We find that 42% ± 13% and 50% ± 17% of the two samples exhibit excess emission indicative of circumstellar disks. In comparison, the disk fractions for stellar members of these clusters are 33% ± 4% and 45% ±7% (M0-M6, 0.7 M_⊙ ≳ M ≳ 0.1 M_⊙). The similarity in the disk fractions of stars and brown dwarfs is consistent with a common formation mechanism and indicates that the raw materials for planet formation are available around brown dwarfs as often as around stars.

Original language	English (US)
Pages (from-to)	L69-L72
Journal	Astrophysical Journal
Volume	631
Issue number	1 II
DOIs	https://doi.org/10.1086/497031
State	Published - Sep 20 2005

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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title = "The disk fractions of brown dwarfs in IC 348 and Chamaeleon",

abstract = "Using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope, we have obtained mid-infrared photometry for 25 and 18 low-mass members of the IC 348 and Chamaeleon I star-forming clusters, respectively (>M6, M ≲ 0.08 M⊙). We find that 42% ± 13% and 50% ± 17% of the two samples exhibit excess emission indicative of circumstellar disks. In comparison, the disk fractions for stellar members of these clusters are 33% ± 4% and 45% ±7% (M0-M6, 0.7 M⊙ ≳ M ≳ 0.1 M⊙). The similarity in the disk fractions of stars and brown dwarfs is consistent with a common formation mechanism and indicates that the raw materials for planet formation are available around brown dwarfs as often as around stars.",

author = "Luhman, {K. L.} and Lada, {C. J.} and L. Hartmann and Muench, {A. A.} and Megeath, {S. T.} and Allen, {L. E.} and Myers, {P. C.} and J. Muzerolle and E. Young and Fazio, {G. G.}",

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doi = "10.1086/497031",

language = "English (US)",

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TY - JOUR

T1 - The disk fractions of brown dwarfs in IC 348 and Chamaeleon

AU - Luhman, K. L.

AU - Lada, C. J.

AU - Hartmann, L.

AU - Muench, A. A.

AU - Megeath, S. T.

AU - Allen, L. E.

AU - Myers, P. C.

AU - Muzerolle, J.

AU - Young, E.

AU - Fazio, G. G.

PY - 2005/9/20

Y1 - 2005/9/20

N2 - Using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope, we have obtained mid-infrared photometry for 25 and 18 low-mass members of the IC 348 and Chamaeleon I star-forming clusters, respectively (>M6, M ≲ 0.08 M⊙). We find that 42% ± 13% and 50% ± 17% of the two samples exhibit excess emission indicative of circumstellar disks. In comparison, the disk fractions for stellar members of these clusters are 33% ± 4% and 45% ±7% (M0-M6, 0.7 M⊙ ≳ M ≳ 0.1 M⊙). The similarity in the disk fractions of stars and brown dwarfs is consistent with a common formation mechanism and indicates that the raw materials for planet formation are available around brown dwarfs as often as around stars.

AB - Using the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope, we have obtained mid-infrared photometry for 25 and 18 low-mass members of the IC 348 and Chamaeleon I star-forming clusters, respectively (>M6, M ≲ 0.08 M⊙). We find that 42% ± 13% and 50% ± 17% of the two samples exhibit excess emission indicative of circumstellar disks. In comparison, the disk fractions for stellar members of these clusters are 33% ± 4% and 45% ±7% (M0-M6, 0.7 M⊙ ≳ M ≳ 0.1 M⊙). The similarity in the disk fractions of stars and brown dwarfs is consistent with a common formation mechanism and indicates that the raw materials for planet formation are available around brown dwarfs as often as around stars.

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SP - L69-L72

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

The disk fractions of brown dwarfs in IC 348 and Chamaeleon

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