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

Research output: Contribution to journalArticle

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 languageEnglish (US)
Pages (from-to)L115-L117
JournalAstrophysical Journal
Volume573
Issue number2 II
DOIs
StatePublished - 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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    Apai, D., Pascucci, I., Henning, T., Sterzik, M. F., Klein, R., Semenov, D., Günther, E., & Stecklum, B. (2002). Probing dust around brown dwarfs: The naked LP 944-20 and the disk of Chamaeleon Hα 2. Astrophysical Journal, 573(2 II), L115-L117. https://doi.org/10.1086/342210