Probing Dust around Brown Dwarfs: The Naked LP 944-20 and the Disk of Chamaeleon Hα 2
Open Access
- 10 July 2002
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 573 (2) , L115-L117
- https://doi.org/10.1086/342210
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 Ha2, 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
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