2005A&A...429..685G


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.02CET10:05:11

2005A&A...429..685G - Astronomy and Astrophysics, volume 429, 685-704 (2005/1-2)

An XMM-Newton look at the Wolf-Rayet star WR 40. The star itself, its nebula and its neighbours.

GOSSET E., NAZE Y., CLAESKENS J.-F., RAUW G., VREUX J.-M. and SANA H.

Abstract (from CDS):

We present the results of an XMM-Newton observation of the field of the Wolf-Rayet star WR 40. Despite a nominal exposure of 20ks and the high sensitivity of the satellite, the star itself is not detected: we thus derive an upper limit on its X-ray flux and luminosity. Joining this result to recent reports of a non-detection of some WC stars, we suggest that the X-ray emission from single normal Wolf-Rayet stars could often be insignificant despite remarkable instabilities in the wind. On the basis of a simple modelling of the opacity of the Wolf-Rayet wind of WR 40, we show that any X-ray emission generated in the particular zone where the shocks are supposed to be numerous will indeed have little chance to emerge from the dense wind of the Wolf-Rayet star. We also report the non-detection of the ejecta nebula RCW 58 surrounding WR 40. Concerning the field around these objects, we detected 33 X-ray sources, most of them previously unknown: we establish a catalog of these sources and cross-correlate it with catalogs of optical/infrared sources.

Abstract Copyright:

Journal keyword(s): stars: individual: WR 40 - stars: early-type - stars: Wolf-Rayet - X-rays: stars - ISM: individual objects: RCW 58 - ISM: bubbles

Nomenclature: Fig.8, Table 5: [GNC2005] NN (Nos 1-33).

Simbad objects: 48

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Number of rows : 48

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HD 4004 WR* 00 43 28.3971235391 +64 45 35.383738645 10.28 10.718 10.138     WN4-s 184 0
2 * del Ori Al* 05 32 00.40009 -00 17 56.7424 0.96 2.02 2.41 2.32 2.54 B0III+O9V 746 0
3 * zet Ori ** 05 40 45.52666 -01 56 33.2649 0.50 1.56 1.77 1.85 2.05 O9.7Ib+B0III 331 0
4 HD 50896 WR* 06 54 13.0440847499 -23 55 42.020318514 5.74 6.63 6.91 7.74   WN4b 746 0
5 NGC 2359 HII 07 18 30.000 -13 13 36.00           ~ 159 0
6 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1099 1
7 NGC 3199 HII 10 16 32.8 -57 56 02           ~ 62 1
8 HD 92740 WR* 10 41 17.5154230335 -59 40 36.897706569 5.68 6.50 6.42 7.38   WN7h+O9III-V 383 0
9 HD 93162 WR* 10 44 10.3888220947 -59 43 11.105959983 7.90 8.55 8.80 8.66   O2.5If*/WN6+OB 338 1
10 HD 96309 * 11 04 56.1507652251 -65 24 54.353580483   9.27 8.89     F2V 15 0
11 XMMU J110504.9-653133 X 11 05 04.9 -65 31 33           ~ 1 0
12 XMMU J110508.8-653255 X 11 05 08.8 -65 32 55           ~ 1 0
13 XMMU J110514.7-652706 X 11 05 14.7 -65 27 06           ~ 1 0
14 XMMU J110616.5-653837 X 11 05 16.5 -65 38 37           ~ 1 0
15 XMMU J110524.0-651825 X 11 05 24.0 -65 18 25           ~ 1 0
16 UCAC4 124-040601 * 11 05 25.3762837443 -65 17 05.663958907     15.6 15.79   ~ 2 0
17 XMMU J110529.7-653251 X 11 05 29.7 -65 32 51     13.5     ~ 1 0
18 XMMU J110531.4-653227 X 11 05 31.4 -65 32 27           ~ 1 0
19 XMMU J110537.7-653502 X 11 05 37.60 -65 35 00.8   16.4 15.8     ~ 1 0
20 XMMU J110541.4-652012 X 11 05 41.4 -65 20 12           ~ 1 0
21 2MASS J11054416-6528422 X 11 05 44.1537356191 -65 28 42.099004897   18.3 17.8     ~ 1 0
22 2MASS J11054629-6523217 * 11 05 46.2730707526 -65 23 21.698226683   18.4 17.6     ~ 1 0
23 XMMU J110550.1-653238 X 11 05 50.1 -65 32 38           ~ 1 0
24 2MASS J11055212-6536245 * 11 05 52.1108158638 -65 36 24.494556070   16.4 15.8     ~ 1 0
25 XMMU J110555.9-652928 X 11 05 55.9 -65 29 28           ~ 1 0
26 XMMU J110558.5-653545 X 11 05 58.5 -65 35 45           ~ 1 0
27 XMMU J110559.6-653859 X 11 05 59.6 -65 38 59           ~ 1 0
28 XMMU J110613.4-653121 X 11 06 13.4 -65 31 21           ~ 1 0
29 HD 96548 WR* 11 06 17.2033098417 -65 30 35.237611013 7.10 7.80 7.70 8.49   WN8h 393 0
30 2MASS J11061801-6521356 * 11 06 18.0150455631 -65 21 35.619400185   15.4 14.4     ~ 1 0
31 XMMU J110633.3-651934 X 11 06 33.3 -65 19 34           ~ 1 0
32 XMMU J110634.4-653223 X 11 06 34.4 -65 32 23           ~ 1 0
33 XMMU J110650.1-653302 X 11 06 50.1 -65 33 02           ~ 1 0
34 2MASS J11065926-6535108 * 11 06 59.2752347762 -65 35 10.787748526   17.4 16.9     ~ 1 0
35 XMMU J110701.8-653103 X 11 07 01.8 -65 31 03           ~ 1 0
36 2MASS J11070502-6535164 X 11 07 05.0332413887 -65 35 16.428723895     17.6     ~ 1 0
37 2MASS J11070795-6530479 * 11 07 07.9638785764 -65 30 47.914285953   16.5 16.1     ~ 1 0
38 XMMU J110719.5-652116 X 11 07 19.5 -65 21 16     16.3     ~ 1 0
39 2MASS J11072830-6531258 X 11 07 28.2887420994 -65 31 25.866509060   17.9 17.4     ~ 1 0
40 2MASS J11073002-6522361 * 11 07 30.0114847868 -65 22 36.189415694   18.1 17.2     ~ 1 0
41 2MASS J11073226-6531250 * 11 07 32.2567850181 -65 31 25.054874914   17.0 16.6     ~ 1 0
42 2MASS J11081215-6534167 * 11 08 12.1596237889 -65 34 16.855902348   16.3 15.9     ~ 1 0
43 HD 96920 * 11 08 26.3450596792 -65 25 42.720059537   8.21 7.10     G8III 7 0
44 * tau Sco * 16 35 52.9528530 -28 12 57.661515 1.55 2.56 2.81 2.93 3.18 B0.2V 862 0
45 * 9 Sgr Em* 18 03 52.4455370104 -24 21 38.639393923 5.08 5.97 5.97 5.72 5.70 O4V((f))z 520 0
46 HD 165688 WR* 18 07 56.9612003141 -19 23 56.866361615 10.46 10.31 9.87 9.85   WN5-6b 147 0
47 HD 169010 WR* 18 23 16.3425134513 -13 43 26.103469647 13.53 12.99 12.02 11.95   WC 75 0
48 NGC 6888 ISM 20 12 07 +38 21.3   7.44       WN6b(h) 260 1

    Equat.    Gal    SGal    Ecl

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2020.12.02-10:05:11

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