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J/A+A/376/907 Near-IR Sources in the Cederblad 110 region. (Persi+ 2001)
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Beginning of ReadMe :J/A+A/376/907 Near-IR Sources in the Cederblad 110 region. (Persi+ 2001)
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Sub-arcsec resolution near-infrared images of the Cederblad 110 region.
Persi P., Marenzi A.R., Gomez M., Olofsson G.
<Astron. Astrophys. 376, 907 (2001)>
=2001A&A...376..907P
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ADC_Keywords: Stars, pre-main sequence ; Photometry, infrared
Keywords: stars: formation - stars: low-mass, brown dwarfs -
stars: pre-main sequence - infrared: stars
Abstract:
We present the results of deep (K_s_=18.9) sub-arcsec resolution
(0.3") imaging observations of the Cederblad 110 region in the
Chamaeleon I dark cloud. This region (roughly 5'x5') 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
2" ( 320AU 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.