2014A&A...562A...6C


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.22CET18:22:17

2014A&A...562A...6C - Astronomy and Astrophysics, volume 562A, 6-6 (2014/2-1)

Star forming regions linked to RCW 78 and the discovery of a new IR bubble.

CAPPA C.E., RUBIO M., ROMERO G.A., DURONEA N.U. and FIRPO V.

Abstract (from CDS):

With the aim of investigating the presence of molecular and dust clumps linked to two star forming regions identified in the expanding molecular envelope of the stellar wind bubble RCW78, we analyzed the distribution of the molecular gas and cold dust. To accomplish this study we performed dust continuum observations at 870µm and 13CO(2-1) line observations with the Atacama Pathfinder EXperiment (APEX) telescope, using the Large Apex BOlometer CAmera (LABOCA) and SHeFI-1 instruments, respectively, and analyzed Herschel images at 70, 160, 250, 350, and 500µm. These observations allowed us to identify cold dust clumps linked to region B (that we have named the southern clump) and region C (clumps 1 and 2), and an elongated filament. Molecular gas was clearly detected linked to the southern clump and the filament. The velocity of the molecular gas is compatible with the location of the dense gas in the expanding envelope of RCW78. We estimate dust temperatures and total masses for the dust condensations from the emissions at different wavelengths in the far-IR and from the molecular line using local thermodynamic equilibrium and the virial theorem. Masses obtained through different methods agree within a factor of 2-6. Color-color diagrams and spectral energy distribution analysis of young stellar objects (YSOs) confirmed the presence of intermediate and low-mass YSOs in the dust regions, indicating that moderate star formation is present. In particular, a cluster of IR sources was identified inside the southern clump. The IRAC image at 8µm revealed the existence of an infrared dust bubble of 16'' in radius probably linked to the O-type star HD117797 located at 4kpc. The distribution of the near- and mid-IR emission indicate that warm dust is associated with the bubble.

Abstract Copyright:

Journal keyword(s): ISM: bubbles - ISM: individual objects: RCW 78 - stars: formation

CDS comments: Paragraph 3.1.1 Calibrator IRAS 1314-6264 not identified. Paragraph 4.1.1 filament CF1 from 2012A&A...540A.121D not in SIMBAD.

Simbad objects: 44

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Number of rows : 44

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * omi Cet Mi* 02 19 20.79210 -02 58 39.4956   7.63 6.53 5.03   M5-9IIIe+DA 1422 0
2 V* VY CMa s*r 07 22 58.32877 -25 46 03.2355 12.01 10.19 7.95     M5Iae 987 0
3 HD 117688 WR* 13 33 30.1195029290 -62 19 01.211515819 8.69 10.81 10.90 10.44   WN7 115 0
4 RCW 78 HII 13 33.9 -62 15           ~ 24 0
5 2MASS J13340796-6227062 IR 13 34 07.9526252489 -62 27 06.382995627           ~ 1 0
6 2MASS J13340853-6227109 IR 13 34 08.533 -62 27 10.91           ~ 1 0
7 2MASS J13340882-6226586 IR 13 34 08.8245483414 -62 26 58.619863613           ~ 1 0
8 2MASS J13340978-6227072 IR 13 34 09.7817149516 -62 27 07.200799467           ~ 1 0
9 2MASS J13340980-6226583 IR 13 34 09.801 -62 26 58.37           ~ 1 0
10 2MASS J13340991-6226499 IR 13 34 09.9819190669 -62 26 49.429030316           ~ 1 0
11 2MASS J13341000-6227018 IR 13 34 10.005 -62 27 01.87           ~ 1 0
12 MSX6C G307.8561+00.0463 IR 13 34 10.2 -62 24 58           ~ 2 0
13 2MASS J13341028-6226540 IR 13 34 10.2827929744 -62 26 54.044491042           ~ 1 0
14 SSTGLMC G307.8497+00.0063 IR 13 34 10.353 -62 27 24.08           ~ 1 0
15 2MASS J13341086-6226537 * 13 34 10.8575037963 -62 26 53.756903667           ~ 1 0
16 2MASS J13341085-6227130 IR 13 34 10.9273212750 -62 27 13.731704293           ~ 1 0
17 IRAS 13307-6211 FIR 13 34 11.6 -62 27 01           ~ 3 0
18 HD 117797 * 13 34 11.9819702070 -62 25 01.783079406 9.13 9.68 9.20 9.56   O7.5fp 51 0
19 MSX6C G307.8603+00.0439 IR 13 34 12.6 -62 25 04           ~ 2 0
20 2MASS J13341270-6221339 IR 13 34 12.7110763868 -62 21 33.880373760           ~ 1 0
21 MSX6C G307.8620+00.0399 IR 13 34 13.8 -62 25 18           ~ 2 0
22 SSTGLMC G307.8687+00.0756 IR 13 34 14.135 -62 23 06.70           ~ 1 0
23 [CRM2009] B FIR 13 34 15 -62 26.0           ~ 2 0
24 2MASS J13341619-6222319 IR 13 34 16.196 -62 22 31.97           ~ 1 0
25 2MASS J13341623-6224506 * 13 34 16.2159585299 -62 24 50.584483636           ~ 1 0
26 SDC G307.873+0.079 DNe 13 34 16.27 -62 22 48.3           ~ 4 0
27 2MASS J13341660-6223585 * 13 34 16.6638543169 -62 23 58.287519249           ~ 1 0
28 2MASS J13341684-6223370 IR 13 34 16.849 -62 23 37.07           ~ 1 0
29 2MASS J13341700-6223028 * 13 34 16.9866444085 -62 23 02.825741815           ~ 1 0
30 2MASS J13341932-6224580 * 13 34 19.3192194834 -62 24 58.084836456           ~ 1 0
31 2MASS J13342151-6225058 IR 13 34 21.5107146064 -62 25 05.818768231           ~ 1 0
32 SSTGLMC G307.8761+00.0227 IR 13 34 22.462 -62 26 09.96           ~ 1 0
33 C 1331-622 OpC 13 34 37 -62 25.0           ~ 10 0
34 2MASS J13344426-6225229 IR 13 34 44.2699638835 -62 25 22.962875461           ~ 1 0
35 2MASS J13344615-6226472 IR 13 34 46.160 -62 26 47.23           ~ 1 0
36 2MASS J13344675-6225401 IR 13 34 46.759 -62 25 40.16           ~ 1 0
37 2MASS J13344931-6226084 IR 13 34 49.2988792133 -62 26 08.538073608           ~ 1 0
38 2MASS J13345107-6226258 IR 13 34 51.072 -62 26 25.84           ~ 1 0
39 SSTGLMC G307.9430+00.0189 IR 13 34 56.990 -62 25 43.18           ~ 1 0
40 2MASS J13345960-6224513 * 13 34 59.6173317353 -62 24 51.290362818           ~ 1 0
41 2MASS J13350130-6226147 IR 13 35 01.2678206163 -62 26 14.963726673           ~ 1 0
42 2MASS J13350291-6225137 IR 13 35 02.9195213418 -62 25 13.825720481           ~ 1 0
43 [CRM2009] C FIR 13 35 10 -62 26.0           ~ 2 0
44 V* X TrA C* 15 14 19.1744832785 -70 04 46.126632480 15.88 9.19 5.81     C5,5 104 0

    Equat.    Gal    SGal    Ecl

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2020.02.22-18:22:17

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