1994A&A...286..935B

Query : 1994A&A...286..935B

1994A&A...286..935B - Astronomy and Astrophysics, volume 286935-942 (1994/6-3)

ROSAT observation of the giant HII region RCW 49.

BELLONI T. and MEREGHETTI S.

Abstract (from CDS):

We have observed the southern emission nebula RCW 49 with the PSPC instrument on board the ROSAT satellite. Diffuse X-ray emission is seen to extend over a large portion of the detector. Two regions of X-ray emission can be identified: one associated to the core of the optical nebula, where the X-ray correlate with the optical, and a fainter one anticorrelated with the optical. The young star cluster Westerlund 2 is detected as peaked emission inside the core region, and is resolved in at least three point sources. The morphology and possible nature of the extended X-ray emission are discussed, together with their interrelation with other objects in the field. Among the additional point sources detected in the field, two of the three Wolf-Rayet stars present in this region are tentatively identified.

Abstract Copyright: ∼

Journal keyword(s): ISM: individual: RCW 49 - HII regions - X-rays: ISM - ISM: bubbles

Nomenclature: [BM94] NN N=25

Simbad objects: 28

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Number of rows : 28
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 2MASS J10230067-5742265 PM* 10 23 00.6719197200 -57 42 26.507463228           ~ 5 0
2 2E 1021.5-5720 X 10 23 22.5 -57 35 42           ~ 4 0
3 [BM94] 19 X 10 23 40.4 -57 57 50     12.5     ~ 1 0
4 HD 90273 * 10 23 44.4543211632 -57 38 31.534939032 8.35 9.25 9.05 9.58   ON7V((f)) 91 0
5 HD 90289 V* 10 23 50.6307943272 -57 57 14.154649776   7.834 6.325     K4III 29 0
6 [BM94] 20 X 10 23 52.3 -57 57 32           ~ 1 0
7 V* V712 Car EB* 10 23 58.0126366512 -57 45 48.937268268 15.466 15.473 13.5 12.6   O3If*/WN6+O3If*/WN6 176 0
8 2E 1022.1-5730 X 10 24 01.6 -57 45 21           ~ 4 1
9 Cl Westerlund 2 5 * 10 24 02.4404730984 -57 44 36.147162768 14.149 14.514 13.155 12.2   O5/5.5V/III(f) 26 0
10 [BM94] 24 X 10 24 02.5 -57 45 23           ~ 1 0
11 GUM 29 HII 10 24 14.6 -57 46 58           ~ 219 0
12 2MASS J10241665-5739310 Y*? 10 24 16.6592254200 -57 39 31.147165944       15.9   ~ 2 0
13 2MASS J10245850-5747379 Y*? 10 24 58.5042491664 -57 47 37.920183000       14.0   ~ 4 0
14 [BM94] 18 X 10 25 03.1 -57 54 17           ~ 1 0
15 [BM94] 12 X 10 25 36.8 -57 50 45           ~ 1 0
16 [BM94] 2 X 10 25 47.0 -57 35 24           ~ 1 0
17 [BM94] 10 X 10 25 49.7 -57 47 39           ~ 1 0
18 [BM94] 13 X 10 25 53.7 -57 53 53           ~ 1 0
19 [BM94] 17 X 10 25 56.0 -57 45 57           ~ 1 0
20 [BM94] 4 X 10 25 56.1 -57 37 56     12.2     ~ 1 0
21 THA 35-II-42 WR* 10 25 56.5024585224 -57 48 43.519215708   14.168 12.661 12.102   WN5ha/O3+O3Vz((f*)) 105 0
22 [BM94] 6 X 10 25 57.7 -57 39 28           ~ 1 0
23 RX J1026.0-5759 X 10 26 04.6 -57 59 08           ~ 1 0
24 [BM94] 8 X 10 26 05.1 -57 46 28     12.1     ~ 1 0
25 USNO-A2.0 0300-09622101 PM* 10 26 12.7406326284 -57 56 46.835263834   16.5   14.882   ~ 3 0
26 CPD-56 3337 PM* 10 26 46.0612193374 -57 35 48.231008303   12.345 11.232 10.839   ~ 2 0
27 [BM94] 1 X 10 26 55.3 -57 33 57     12.7     ~ 1 0
28 [BM94] 7 X 10 27 27.9 -57 42 43     13.2     ~ 1 0

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