2019A&A...625A..57H


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.20CEST09:34:57

2019A&A...625A..57H - Astronomy and Astrophysics, volume 625A, 57-57 (2019/5-1)

The Galactic WN stars revisited. Impact of Gaia distances on fundamental stellar parameters.

HAMANN W.-R., GRAFENER G., LIERMANN A., HAINICH R., SANDER A.A.C., SHENAR T., RAMACHANDRAN V., TODT H. and OSKINOVA L.M.

Abstract (from CDS):

Comprehensive spectral analyses of the Galactic Wolf-Rayet stars of the nitrogen sequence (i.e. the WN subclass) have been performed in a previous paper. However, the distances of these objects were poorly known. Distances have a direct impact on the "absolute" parameters, such as luminosities and mass-loss rates. The recent Gaia Data Release (DR2) of trigonometric parallaxes includes nearly all WN stars of our Galactic sample. In the present paper, we apply the new distances to the previously analyzed Galactic WN stars and rescale the results accordingly. On this basis, we present a revised catalog of 55 Galactic WN stars with their stellar and wind parameters. The correlations between mass-loss rate and luminosity show a large scatter, for the hydrogen-free WN stars as well as for those with detectable hydrogen. The slopes of the logL-logM correlations are shallower than found previously. The empirical Hertzsprung-Russell diagram (HRD) still shows the previously established dichotomy between the hydrogen-free early WN subtypes that are located on the hot side of the zero-age main sequence (ZAMS), and the late WN subtypes, which show hydrogen and reside mostly at cooler temperatures than the ZAMS (with few exceptions). However, with the new distances, the distribution of stellar luminosities became more continuous than obtained previously. The hydrogen-showing stars of late WN subtype are still found to be typically more luminous than the hydrogen-free early subtypes, but there is a range of luminosities where both subclasses overlap. The empirical HRD of the Galactic single WN stars is compared with recent evolutionary tracks. Neither these single-star evolutionary models nor binary scenarios can provide a fully satisfactory explanation for the parameters of these objects and their location in the HRD.

Abstract Copyright: © ESO 2019

Journal keyword(s): stars: mass-loss - stars: winds, outflows - stars: Wolf-Rayet - stars: atmospheres - stars: evolution - stars: distances

Simbad objects: 85

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Number of rows : 85

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 188 0
2 HD 6327 WR* 01 05 23.0143603 +60 25 18.965197   11.49 11.33     WN2-w 114 0
3 HD 9974 WR* 01 38 55.6271504593 +58 09 22.671823428 9.85 10.71 10.69     WN3h-w 162 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5984 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15432 1
6 BAT99 106 WR* 05 38 42.291 -69 06 03.45   12.83 12.93     WN5h 55 0
7 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1800 1
8 BAT99 108 WR* 05 38 42.43 -69 06 02.2   12.78 12.77     WN5h 64 0
9 BAT99 109 WR* 05 38 42.45 -69 06 02.2   13.09 13.38     WN5h 40 0
10 HD 50896 WR* 06 54 13.0440847499 -23 55 42.020318514 5.74 6.63 6.91 7.74   WN4b 749 0
11 HD 56925 WR* 07 18 29.1313276537 -13 13 01.513156589 11.21 11.74 11.56 11.40   WN4b 163 0
12 HD 65865 WR* 07 59 46.2452165709 -28 44 03.084742445 10.62 11.20 10.90 11.16   WN5h 101 0
13 CD-45 4482 WR* 08 44 47.2902196838 -45 58 55.414166402 10.95 11.29 10.74 10.58   WN8h+? 101 0
14 HD 86161 WR* 09 54 52.9034376427 -57 43 38.273623332 7.94 8.65 8.36 8.93   WN8h 208 0
15 HD 89358 WR* 10 17 02.2741836044 -57 54 46.871795579 11.1 11.19 10.83 10.59   WN4-s 165 1
16 WR 20 WR* 10 19 18.4020182129 -59 09 38.850146550   15.34 14.60     WN5-w 36 0
17 HD 90657 WR* 10 26 31.4088129340 -58 38 26.179161012 9.53 10.07 9.65 9.84   WN5+O4-6 150 0
18 HD 92740 WR* 10 41 17.5154230335 -59 40 36.897706569 5.68 6.50 6.42 7.38   WN7h+O9III-V 389 0
19 HD 93131 WR* 10 43 52.2575981063 -60 07 04.016913264 5.52 6.43 6.48 7.46   WN6ha-w 283 0
20 HD 93162 WR* 10 44 10.3888220947 -59 43 11.105959983 7.90 8.55 8.80 8.66   O2.5If*/WN6+OB 344 1
21 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 920 2
22 WR 28 WR* 10 48 58.7235338702 -59 03 37.303699221   13.70 12.98     WN6(h)-w 30 0
23 HD 94546 WR* 10 53 44.8196302 -59 30 46.694249 10.38 10.94 10.51 10.48   WN4+O8V 114 0
24 WR 34 WR* 11 00 06.4565379740 -61 26 30.107771412   15.26 14.50     WN5-w 33 0
25 WR 35 WR* 11 00 21.8549973326 -61 13 52.416069146   14.460 13.574 13.453   WN6h-w 32 0
26 WR 36 WR* 11 02 32.9786581120 -59 26 20.908131146   13.90 12.94 12.86   WN5-s 33 0
27 WR 37 WR* 11 05 13.9025929090 -61 20 41.184951648   17.40 16.0     WN4-s 37 0
28 HD 96548 WR* 11 06 17.2033098417 -65 30 35.237611013 7.10 7.80 7.70 8.49   WN8h 396 0
29 MR 39 WR* 11 16 57.8367853584 -59 26 23.891767387   13.04 12.79 12.71   WN4-w 51 0
30 HD 104994 WR* 12 05 18.7203813373 -62 03 10.139083749 9.95 10.94 10.93 11.03   WN3p-w 159 0
31 HD 311884 WR* 12 43 50.9989169468 -63 05 14.811840934 11.45 11.64 10.81 10.59   WN6+O5V 159 0
32 WR 49 WR* 13 13 51.3090989970 -65 18 08.897671074   13.59 13.40 13.51   WN5(h)-w 40 0
33 MR 45 WR* 13 18 23.3593856408 -62 28 21.220292118   15.53 14.32 13.97   WN4-w 45 0
34 MR 48 WR* 13 32 43.7631500403 -65 01 27.835643271 12.85 13.20 12.73 12.61   WN5-w 53 0
35 HD 117688 WR* 13 33 30.1195029290 -62 19 01.211515819 8.69 10.81 10.90 10.44   WN7 122 0
36 MR 53 WR* 14 13 03.5249088603 -65 26 52.708243005 11.93 12.51 12.32 12.21   WN5-w 69 0
37 WRAY 16-154 WR* 14 31 06.13 -61 20 59.5   15.82 14.22     WN6-s 31 1
38 WRAY 15-1254 WR* 14 50 58.2650618251 -59 51 26.428849251 14.29 13.96 12.47 11.85   WN6 42 0
39 HD 134877 WR* 15 14 57.7490917148 -59 50 30.232117350 12.13 12.19 11.34 11.08   WN8(h) 99 0
40 MR 55 WR* 15 15 32.6263216950 -59 02 30.692489276 12.46 12.56 11.84 11.63   WN6-w 67 0
41 HD 143414 WR* 16 03 49.3451223381 -62 41 35.942835918 9.32 10.03 10.10     WN6-w 106 0
42 WR 74 WR* 16 16 13.81 -51 36 41.8   15.53 14.01     WN7 27 0
43 HD 147419 WR* 16 24 26.2278740665 -51 32 06.062121260   11.46 10.50 10.74   WN6-s 106 0
44 HD 151932 WR* 16 52 19.2478420644 -41 51 16.269632432 6.06 6.79 6.51 7.64   WN7h 300 0
45 WRAY 15-1600 WR* 17 04 04.6347450070 -45 12 15.059699813 12.95 13.00 11.55 11.85   WN7(h) 44 0
46 MR 67 WR* 17 10 54.6275136033 -46 36 00.577179537   13.15 12.50 12.28   WN6 38 0
47 THA 31-1 WR* 17 11 21.7005819428 -39 53 21.977257211   14.18 13.01 12.54   WN7 38 0
48 LS 3982 WR* 17 14 27.1191115555 -39 45 47.053559348 10.63 10.95 10.41     WN6h-w 65 0
49 WRAY 15-1666 WR* 17 18 52.8750745581 -38 50 03.606959080 13.93 13.27 11.83 11.43   WN7 68 0
50 CD-38 11746 WR* 17 19 00.5230727136 -38 48 51.250086613 13.01 12.48 11.02 10.55   WN8h 90 0
51 WR 91 WR* 17 20 22.0232742995 -38 56 48.379201459   17.70 16.2     WN7 34 0
52 HD 158860 WR* 17 33 07.0669567120 -33 38 23.500757398   12.20 10.69 10.38   WN5-w 49 0
53 HD 318139 WR* 17 42 09.7605770496 -32 33 24.800534509   13.93 12.78 12.20   WN7 44 0
54 NAME Galactic Center gam 17 45 39.60213 -29 00 22.0000           ~ 12262 0
55 V* V3893 Sgr WR* 17 45 47.5403190596 -26 10 26.777772852   15.13 14.20 14.23   WR 109 1
56 EM* AS 268 WR* 18 02 23.4579211710 -23 34 37.481060535   14.38 12.31 11.43   WN9h 99 0
57 SS73 123 WR* 18 04 46.0977446521 -21 51 27.157890594   15.00 13.51 12.80 11.35 WN8 29 0
58 HD 313846 WR* 18 05 25.7345590489 -23 00 20.335027460 10.48 10.69 9.89 9.89   WN9h+OB 127 0
59 HD 165688 WR* 18 07 56.9612003141 -19 23 56.866361615 10.46 10.31 9.87 9.85   WN5-6b 148 0
60 MR 87 WR* 18 25 30.0233828772 -14 38 41.034349989 13.38 13.09 11.86 11.33   WN6-w 75 0
61 EM* AS 306 WR* 18 27 04.2927141192 -12 22 52.681549543   14.79       WN8h 45 0
62 MR 89 WR* 18 41 00.8669826586 -04 26 14.473452479 13.1 12.97 11.93 11.67   WN7 67 2
63 HD 177230 WR* 19 03 59.0232385542 -04 19 01.911120922 11.32 11.60 11.12     WN8 164 0
64 Hen 2-427 WR* 19 11 30.8750511254 +16 51 38.199008052   12.19 11.50     WN8h 323 0
65 HD 186943 WR* 19 46 15.9393000440 +28 16 19.074048808 9.86 10.50 10.23     WN3+O9.5V 179 1
66 MR 96 WR* 19 48 18.2649973585 +30 26 52.670591228   13.3 13.4     WN4-w 34 0
67 HD 187282 WR* 19 48 32.1968574697 +18 12 03.693991312 9.60 10.49 10.51     WN4(h)-w 187 0
68 EM* AS 374 WR* 19 59 12.5938476816 +31 27 09.011482722   13.57 12.13 11.52   WN8(h) 61 1
69 MR 97 WR* 20 00 19.1224209318 +33 15 51.098849239 12.93 13.050 12.080     WN7h 73 0
70 HD 190918 WR* 20 05 57.3242972785 +35 47 18.153743699 6.11 6.88 6.75     WN5+O9I 348 0
71 HD 191765 WR* 20 10 14.1929815789 +36 10 35.069005168 7.64 8.08 8.08     WN6-s 429 0
72 HD 192163 WR* 20 12 06.5420067895 +38 21 17.783840972 7.12 7.49 7.50     WN6(h)-s 526 0
73 HD 193077 WR* 20 17 00.0264117871 +37 25 23.780238760 7.82 8.32 8.01 8.71   WN5-w+B? 280 0
74 HD 193576 WR* 20 19 32.4230196684 +38 43 53.958209968 8.15 8.53 8.00     WN5+O6II-V 688 0
75 HD 193928 WR* 20 21 31.7290292758 +36 55 12.769017074 10.67 10.60 9.78     WN5-w+O5V-III 189 0
76 WR 142 WR* 20 21 44.3438534563 +37 22 30.543604467   14.39 12.99 12.73 11.04 WO2 122 0
77 EM* AS 431 WR* 20 36 43.6345223872 +40 21 07.453291511     13.73 12.51   WN8(h)+B0.5V 212 0
78 HD 197406 WR* 20 41 21.5486849958 +52 35 15.140677138 10.42 10.87 10.30     WN8h+B3IV/BH 189 0
79 WR 149 WR* 21 07 11.6932466487 +48 25 36.238906743   15.90 14.70     WN5-s 42 0
80 MR 114 WR* 22 09 33.4427302357 +57 44 30.525316054 12.78 12.91 12.12     WN4+O5V 134 0
81 HD 211564 WR* 22 16 24.0322637172 +55 37 36.763974776   11.72 11.61     WN3(h)-w 116 0
82 HD 214419 WR* 22 36 53.9549498582 +56 54 20.985957352 8.68 9.21 8.80     WN6o+O9Ib/II 364 1
83 MR 119 WR* 23 00 10.1254033879 +60 55 38.409749646 11.85 12.18 11.01     WN8h 92 0
84 HD 219460B WR* 23 15 12.542 +60 27 01.00   11.32 10.75     WN4.5 8 0
85 EM* AS 513 WR* 23 43 30.5961785796 +61 55 48.136617629 12.02 11.98 11.282     WN7h+Be? 66 0

    Equat.    Gal    SGal    Ecl

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2021.06.20-09:34:57

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