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A&A 376, 907-916 (2001)
DOI: 10.1051/0004-6361:20010962
Sub-arcsec resolution near-infrared images of the Cederblad 110 region
P. Persi1, A. R. Marenzi1, M. Gómez2 and G. Olofsson31 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
(Received 14 March 2001 / Accepted 4 July 2001 )
Abstract
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
Offprint request: P. Persi, persi@ias.rm.cnr.it
SIMBAD Objects
© ESO 2001