Probing dust around brown dwarfs: The naked LP 944-20 and the disk of Chamaeleon Hα 2

D. Apai; I. Pascucci; Th Henning; M. F. Sterzik; R. Klein; D. Semenov; E. Günther; B. Stecklum

doi:10.1086/342210

Probing dust around brown dwarfs: The naked LP 944-20 and the disk of Chamaeleon Hα 2

D. Apai, I. Pascucci, Th Henning, M. F. Sterzik, R. Klein, D. Semenov, E. Günther, B. Stecklum

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35 Scopus citations

Abstract

We present the first mid-infrared (MIR) detection of a field brown dwarf (BD) and the first ground-based MIR measurements of a disk around a young BD candidate. We prove the absence of warm dust surrounding the field BD LP 944-20. In the case of the young BD candidate Cha Hα 2, we find clear evidence for thermal dust emission from a disk. Surprisingly, the object does not exhibit any silicate feature as previously predicted. We show that the flat spectrum can be explained by an optically thick flat dust disk.

Original language	English (US)
Pages (from-to)	L115-L117
Journal	Astrophysical Journal
Volume	573
Issue number	2 II
DOIs	https://doi.org/10.1086/342210
State	Published - Jul 10 2002

Keywords

Accretion, accretion disks
Circumstellar matter
Stars: individual (Chamaeleon Hα 2, LP 944-20)
Stars: low-mass, brown dwarfs

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/342210

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title = "Probing dust around brown dwarfs: The naked LP 944-20 and the disk of Chamaeleon Hα 2",

abstract = "We present the first mid-infrared (MIR) detection of a field brown dwarf (BD) and the first ground-based MIR measurements of a disk around a young BD candidate. We prove the absence of warm dust surrounding the field BD LP 944-20. In the case of the young BD candidate Cha Hα 2, we find clear evidence for thermal dust emission from a disk. Surprisingly, the object does not exhibit any silicate feature as previously predicted. We show that the flat spectrum can be explained by an optically thick flat dust disk.",

keywords = "Accretion, accretion disks, Circumstellar matter, Stars: individual (Chamaeleon Hα 2, LP 944-20), Stars: low-mass, brown dwarfs",

author = "D. Apai and I. Pascucci and Th Henning and Sterzik, {M. F.} and R. Klein and D. Semenov and E. G{\"u}nther and B. Stecklum",

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day = "10",

doi = "10.1086/342210",

language = "English (US)",

volume = "573",

pages = "L115--L117",

journal = "Astrophysical Journal",

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number = "2 II",

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TY - JOUR

T1 - Probing dust around brown dwarfs

T2 - The naked LP 944-20 and the disk of Chamaeleon Hα 2

AU - Apai, D.

AU - Pascucci, I.

AU - Henning, Th

AU - Sterzik, M. F.

AU - Klein, R.

AU - Semenov, D.

AU - Günther, E.

AU - Stecklum, B.

PY - 2002/7/10

Y1 - 2002/7/10

N2 - We present the first mid-infrared (MIR) detection of a field brown dwarf (BD) and the first ground-based MIR measurements of a disk around a young BD candidate. We prove the absence of warm dust surrounding the field BD LP 944-20. In the case of the young BD candidate Cha Hα 2, we find clear evidence for thermal dust emission from a disk. Surprisingly, the object does not exhibit any silicate feature as previously predicted. We show that the flat spectrum can be explained by an optically thick flat dust disk.

AB - We present the first mid-infrared (MIR) detection of a field brown dwarf (BD) and the first ground-based MIR measurements of a disk around a young BD candidate. We prove the absence of warm dust surrounding the field BD LP 944-20. In the case of the young BD candidate Cha Hα 2, we find clear evidence for thermal dust emission from a disk. Surprisingly, the object does not exhibit any silicate feature as previously predicted. We show that the flat spectrum can be explained by an optically thick flat dust disk.

KW - Accretion, accretion disks

KW - Circumstellar matter

KW - Stars: individual (Chamaeleon Hα 2, LP 944-20)

KW - Stars: low-mass, brown dwarfs

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U2 - 10.1086/342210

DO - 10.1086/342210

M3 - Article

SN - 0004-637X

VL - 573

SP - L115-L117

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2 II

ER -

Probing dust around brown dwarfs: The naked LP 944-20 and the disk of Chamaeleon Hα 2

Abstract

Keywords

ASJC Scopus subject areas

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