Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...453..937y&link_type=abstract
Astronomy and Astrophysics, Volume 453, Issue 3, July III 2006, pp.937-941
Astronomy and Astrophysics
Astrophysics
Stars: Formation, Ism: Clouds, Ism: Individual: Objects: Dc 287.1+02.4, Infrared: Ism, Radio Lines: Ism, Ism: Dust, Extinction
Scientific paper
Aims.We report the discovery of a group of 12 new infrared sources seen toward IRAS 10501-5630 and the southern dark globule DC 287.1+02.4. The globule appears as a round patch of extinction in optical images with a typical diameter of 5 arcmin. Methods: .The sources are seen on Ks and L' band images taken using SOFI at the NTT and ISAAC at the VLT. The globule was mapped in millimeter molecular transitions (CO(1-0), C18O(1-0), C18O(2-1), CS(2-1), HCN(1-0)) using the SEST telescope. Results: .Millimeter-wave spectroscopy revealed a single dense core seen in C18O, CS, and HCN, extending about 2 arcmin. The infrared sources are likely to be embedded in the dense cloud core. The reddest of the new infrared sources, named here DC 287.1+02.4 IRS, is not detected shortward of 2 μm, and it exhibits a very red (Ks - L') colour. The location and colour of this source suggest that this is the near-infrared counterpart of IRAS 10501-5630. Red nebular emission with an elongated shape is also seen in the H and Ks band images and could be due to scattered light originating in the embedded objects.
Figueira P. R.
Yun Joao Lin
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