2008AJ....135.2279P


Query : 2008AJ....135.2279P

2008AJ....135.2279P - Astron. J., 135, 2279-2286 (2008/June-0)

Star formation in the southern dark cloud DC 296.2-3.6.

PERSI P., GOMEZ M., TAPIA M., ROTH M., DE BUIZER J.M. and MARENZI A.R.

Abstract (from CDS):

We 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.

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Journal keyword(s): infrared: ISM - ISM: clouds - stars: formation - stars: individual: DC 296.2-3.6

Nomenclature: Fig.5, Table 1: [PGT2008] DC 296.2-3.6 A (Nos A-E).

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 NAME Car Arm PoG 10 00 -60.0           ~ 471 1
2 HD 91056 * 10 28 52.5748022328 -64 10 20.207849736   7.11 5.27   8.65 M0III 46 0
3 2MASS J11453285-6532589 Y*O 11 45 32.85 -65 32 58.9           ~ 1 0
4 IRAS 11431-6516 HII 11 45 34.0 -65 32 59           ~ 13 0
5 [PGT2008] DC 296.2-3.6 C Y*O 11 45 34.1 -65 32 56           ~ 1 0
6 2MASS J11453413-6532435 Y*O 11 45 34.13 -65 32 43.5           ~ 1 0
7 [PGT2008] DC 296.2-3.6 B Y*O 11 45 35.4 -65 33 01           ~ 1 0
8 2MASS J11453688-6533063 Y*O 11 45 36.88 -65 33 06.4           ~ 1 0
9 ESO 94-6 RNe 11 45 57.1 -65 33 34           ~ 9 0
10 [DB2002b] G296.22-3.55 DNe 11 45 58 -65 34.0           ~ 7 0
11 * 9 Sgr Y*O 18 03 52.4450051016 -24 21 38.632254012 5.08 5.97 5.97 5.72 5.70 O4V((f))z 563 0

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