Issue |
A&A
Volume 376, Number 2, September II 2001
|
|
---|---|---|
Page(s) | L22 - L25 | |
Section | Letters | |
DOI | https://doi.org/10.1051/0004-6361:20011055 | |
Published online | 15 September 2001 |
Exploring brown dwarf disks
Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy
Corresponding author: A. Natta, natta@arcetri.astro.it
Received:
3
July
2001
Accepted:
24
July
2001
We discuss the spectral energy distribution of three very low mass
objects in Chamaeleon I for which ground-based spectroscopy and photometry
as well as ISO measurements in the mid-infrared are available
(Comerón et al. [CITE]; Persi et al. [CITE]). One of these stars
(Cha Hα1) is a bona-fide brown dwarf, with mass 0.04-0.05 .
We show that the observed emission is very well described
by models of circumstellar disks identical to those associated to T Tauri stars,
scaled down to keep the ratio of the disk-to-star mass constant
and to the appropriate stellar parameters.
This result provides a first indication that the formation mechanism
of T Tauri stars (via core contraction and formation of an
accretion disk)
extends to objects in the brown dwarf mass range.
© ESO, 2001
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