Issue |
A&A
Volume 376, Number 3, September IV 2001
|
|
---|---|---|
Page(s) | 907 - 916 | |
Section | Interstellar and circumstellar matter | |
DOI | https://doi.org/10.1051/0004-6361:20010962 | |
Published online | 15 September 2001 |
Sub-arcsec resolution near-infrared images of the Cederblad 110 region*
1
Istituto Astrofisica Spaziale, CNR, Area di Ricerca Tor Vergata, Via del Fosso del Cavaliere, 00133 Roma, Italy
2
Observatorio Astrónomico de Córdoba, Laprida 854, 5000 Córdoba, Argentina
3
Stockolm Observatory, 133 36 Saltsjöbaden, Sweden
Corresponding author: P. Persi, persi@ias.rm.cnr.it
Received:
14
March
2001
Accepted:
4
July
2001
We present the results of deep () sub-arcsec
resolution (0.3´´) imaging observations of the Cederblad 110
region in the Chamaeleon I dark cloud. This region (roughly
) is characterized by the presence of
six ISOCAM-detected young stellar objects (YSOs). Our images have
recovered all these sources at near-infrared (near-IR)
wavelengths. Ced 110 IRS4, the brightest object in the region, is
associated with a remarkable near-IR bipolar nebulosity. Ced 110
IRS6 is resolved in a double system IRS6a and IRS6b with a
separation of
AU at the distance of
the Cha I cloud). We have combined 1.3 mm, far and mid-IR fluxes
from the literature with our JHK data and obtained the spectral
energy distributions (SEDs) for three (IRS4, IRS6a and ISO-ChaI86)
of the six ISOCAM sources in the region. We modelled the SEDs of
IRS6a and ISO-ChaI86 with a spherically symmetric dusty envelope,
using the DUSTY code. These objects are clear Class I sources of
the cloud. Finally, we report the detection of three new objects
in this region (NIR 72, 84 and 89) with significant near-IR
excess. If these sources are associated with the cloud, the
derived luminosities and masses suggest that they are candidate
young brown dwarfs of Chamaeleon I.
Key words: stars: formation / stars: low-mass, brown dwarfs / stars: pre-main sequence / infrared: stars
© ESO, 2001
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