2004AJ....127.2885C


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.22CET21:55:08

2004AJ....127.2885C - Astron. J., 127, 2885-2897 (2004/May-0)

A very large array 3.6 centimeter continuum survey of galactic Wolf-Rayet stars.

CAPPA C., GOSS W.M. and VAN DER HUCHT K.A.

Abstract (from CDS):

We report the results of a survey of radio continuum emission of Galactic Wolf-Rayet (WR) stars north of δ=-46°. The observations were obtained at 8.46 GHz (3.6 cm) using the Very Large Array, with an angular resolution of ∼6"x9" and typical rms noise of ∼0.04 mJy/beam. Our survey of 34 WR stars resulted in 15 definite and five probable detections, 13 of these for the first time at radio wavelengths. All detections are unresolved (θ≲5"). Time variations in flux are confirmed in the cases of WR 98a, 104, 105, and 125. WR 79a and WR 89 are also variable in flux, and we suspect they are also nonthermal emitters. Thus, of our sample 20%-30% of the detected stars are nonthermal emitters. Average mass-loss rate determinations obtained excluding definite and suspected nonthermal cases give similar values for WN (all subtypes) and WC5-7 stars [M{dot}(WN)=(4±3)x10–5 M/yr and M{dot}(WC5-7)=(4±2)x10–5 M/yr], while a lower value was obtained for WC8-9 stars [M{dot}(WC8-9)=(2±1)x10–5 M/yr]. Uncertainties in stellar distances largely contribute to the observed scatter in mass-loss rates. Upper limits to the mass-loss rates were obtained in cases of undetected sources and for sources that probably show additional nonthermal emission.

Abstract Copyright:

Journal keyword(s): radio continuum: stars - Stars: Mass Loss - Stars: Wolf-Rayet

Simbad objects: 39

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Number of rows : 39

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 16523 WR* 02 41 11.6752293070 +56 43 49.735743590 10.03 10.34 9.99     WC6 126 0
2 HD 17638 WR* 02 52 11.6616623898 +56 56 07.129636750 10.99 10.86 10.41     WC6 112 0
3 HD 62910 WR* 07 44 58.2216344436 -31 54 29.553631132 10.08 10.44 10.10 10.17   WN6/WC4 119 0
4 CD-45 4482 WR* 08 44 47.2902196838 -45 58 55.414166402 10.95 11.29 10.74 10.58   WN8h+? 99 0
5 HD 152408 s*b 16 54 58.5049001684 -41 09 03.091715510 5.17 5.92 5.77 7.00   O8Iape 352 0
6 HD 152386 s*b 16 55 06.4500962204 -44 59 21.325469696 8.15 8.64 8.13 8.84   O6:Iafpe 76 0
7 WRAY 15-1581 WR* 16 59 02.1891502339 -45 43 10.016531285   16.34 14.49 14.31 11.95 WC9 36 0
8 MR 66 WR* 17 02 40.3825863866 -45 59 15.455194984   13.62 12.07 11.77   WC9 60 0
9 WRAY 15-1600 WR* 17 04 04.6347450070 -45 12 15.059699813 12.95 13.00 11.55 11.85   WN7(h) 44 0
10 CPD-33 4347 WR* 17 18 49.7246525731 -33 57 41.389875461   13.93 12.56 12.21   WN8/WC9 63 0
11 WRAY 15-1666 WR* 17 18 52.8750745581 -38 50 03.606959080 13.93 13.27 11.83 11.43   WN7 67 0
12 CD-38 11746 WR* 17 19 00.5230727136 -38 48 51.250086613 13.01 12.48 11.02 10.55   WN8h 89 0
13 HD 157451 WR* 17 25 23.2779746024 -43 29 31.469615959 10 10.59 10.20 10.46   WC9 84 0
14 MR 74 WR* 17 36 19.8953384759 -33 26 12.274561705 16.01 14.87 13.18 12.99   WC9 84 1
15 WRAY 15-1736 WR* 17 36 24.4547143641 -32 54 31.435866769   15.12 13.58 13.30 11.27 WC9 40 0
16 WR 98a WR* 17 41 13.0431655551 -30 32 30.425152324   18.40   15.20 13.82 WC8/9 92 1
17 HD 318139 WR* 17 42 09.7605770496 -32 33 24.800534509   13.93 12.78 12.20   WN7 44 0
18 HD 164270 WR* 18 01 43.1452971756 -32 42 55.161881733 8.52 8.97 8.74 9.51   WC9d+? 217 0
19 MR 80 WR* 18 02 04.1238716757 -23 37 42.144766363   14.85       WC9 213 2
20 EM* AS 268 WR* 18 02 23.4579211710 -23 34 37.481060535   14.38 12.31 11.43   WN9h 97 0
21 HD 313643 WR* 18 04 43.6647304100 -21 09 30.557213987 13.58 13.27 12.02 11.67   WC9d 89 0
22 WR 112 WR* 18 16 33.49 -18 58 42.3   20.7 17.7     WC8+O6/7III/V 120 0
23 HD 168206 WR* 18 19 07.3628284656 -11 37 59.165038875 9.65 9.88 9.10     WC8+O8/9III/V 286 1
24 HD 169010 WR* 18 23 16.3425134513 -13 43 26.103469647 13.53 12.99 12.02 11.95   WC 75 0
25 THA 20-1 WR* 18 39 17.9036019736 -10 05 30.898511525   13.07 12.43     WC9d 53 0
26 MR 89 WR* 18 41 00.8669826586 -04 26 14.473452479 13.1 12.97 11.93 11.67   WN7 67 2
27 EM* AS 320 WR* 18 44 13.1527220304 -03 47 57.779718279 13.7 13.340 13.983     WC9d 114 0
28 Hen 2-427 WR* 19 11 30.8750511254 +16 51 38.199008052   12.19 11.50     WN8h 321 0
29 MR 93 WR* 19 28 15.6144084163 +19 33 21.527872339   14.83       WC7+O9(III) 101 0
30 HD 190918 WR* 20 05 57.3242972785 +35 47 18.153743699 6.11 6.88 6.75     WN5+O9I 346 0
31 HD 193793 WR* 20 20 27.9763345925 +43 51 16.289775091 6.90 7.25 6.85 4.58   WC7p+O5 656 1
32 WR 142 WR* 20 21 44.3438534563 +37 22 30.543604467   14.39 12.99 12.73 11.04 WO2 122 0
33 HD 195177 WR* 20 28 22.6627301104 +38 37 18.970997793 13.42 12.67 11.46     WC4+Be 86 0
34 Ass Cyg OB 2 As* 20 33.2 +41 19           ~ 815 0
35 MR 112 WR* 20 35 47.0859278605 +41 22 44.703520146     12.64 12.16   WC5-6e+O8 145 1
36 EM* AS 431 WR* 20 36 43.6345223872 +40 21 07.453291511     13.73 12.51   WN8(h)+B0.5V 212 0
37 HD 211853 WR* 22 18 45.6058273717 +56 07 33.896665584 8.84 9.39 9.00     WN6o+O6I 262 0
38 HD 214419 WR* 22 36 53.9549498582 +56 54 20.985957352 8.68 9.21 8.80     WN6o+O9Ib/II 364 1
39 MR 119 WR* 23 00 10.1254033879 +60 55 38.409749646 11.85 12.18 11.01     WN8h 92 0

    Equat.    Gal    SGal    Ecl

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2021.01.22-21:55:08

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