P. Persi et al. 2008 The Astronomical Journal 135 2279 doi:10.1088/0004-6256/135/6/2279
P. Persi1, M. Gómez2, M. Tapia3, M. Roth4, J. M. De Buizer5,6 and A. R. Marenzi1
Show affiliationsWe report near- and mid-infrared (IR) images of the southern hemisphere dark cloud DC 296.2-3.6 associated with IRAS 11431 – 6516. The Ks and L' images show the presence of an IR nebulosity at the center of the dark cloud (DC). From the analysis of the near-IR color-color diagrams we have identified a young stellar population in the region. Five of these young stellar objects, here named A, B, C, D, and E, were also detected in the mid-IR. Sources B, D, and E are Class I-II T Tauri as suggested by the analysis of their spectral energy distributions. In addition, source E shows a long-term near-IR variability. The near-IR color-color diagrams indicate the presence of circumstellar dust envelope in sources A, B, D, and E, while the fit of SEDs of the intermediate- and low-mass objects A and B with a radiation transfer model including infalling envelope+disk+central source suggests circumstellar disks around these two objects. These results indicate that DC 296.2-3.6, located in the far Carina arm, is associated with an embedded cluster of low-mass young stellar objects.
infrared: ISM; ISM: clouds; stars: formation; stars: individual (DC 296.2–3.6)
Issue 6 (2008 June)
Received 2008 February 2, accepted for publication 2008 March 13
Published 2008 May 13
P. Persi et al. 2008 The Astronomical Journal 135 2279
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