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.
- 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