Volume 376, Number 3, September IV 2001
|Page(s)||907 - 916|
|Section||Interstellar and circumstellar matter|
|Published online||15 September 2001|
Sub-arcsec resolution near-infrared images of the Cederblad 110 region*
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, firstname.lastname@example.org
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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