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


Query : 2019A&A...625A..57H

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 - 2022
#notes
1 HD 4004 WR* 00 43 28.3971737448 +64 45 35.384652468 10.28 10.718 10.138     WN4-s 191 0
2 HD 6327 WR* 01 05 23.0143603 +60 25 18.965197   11.49 11.33     WN2-w 115 0
3 HD 9974 WR* 01 38 55.6274097096 +58 09 22.673806272 9.85 10.71 10.69     WN3h-w 164 0
4 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6371 1
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16153 1
6 BAT99 106 WR* 05 38 42.291 -69 06 03.45   12.83 12.93     WN5h 57 0
7 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1872 1
8 BAT99 108 WR* 05 38 42.43 -69 06 02.2   12.78 12.77     WN5h 72 0
9 BAT99 109 WR* 05 38 42.45 -69 06 02.2   13.09 13.38     WN5h 43 0
10 HD 50896 WR* 06 54 13.0439608392 -23 55 42.023319852 5.74 6.63 6.91 7.74   WN4b 756 0
11 HD 56925 WR* 07 18 29.1311435688 -13 13 01.513932528 11.21 11.74 11.56 11.40   WN4b 165 0
12 HD 65865 WR* 07 59 46.2451717872 -28 44 03.085045476 10.62 11.20 10.90 11.16   WN5h 103 0
13 CD-45 4482 WR* 08 44 47.2901340000 -45 58 55.417387548 10.95 11.29 10.74 10.58   WN8h+? 101 0
14 HD 86161 WR* 09 54 52.9033957968 -57 43 38.274644604 7.94 8.65 8.36 8.93   WN8h 211 0
15 HD 89358 WR* 10 17 02.2743231360 -57 54 46.875258324 11.1 11.19 10.83 10.59   WN4-s 167 1
16 WR 20 WR* 10 19 18.4020394728 -59 09 38.849457528   15.34 14.60     WN5-w 36 0
17 HD 90657 WR* 10 26 31.4087563344 -58 38 26.182481568 9.53 10.07 9.65 9.84   WN5+O4-6 156 0
18 HD 92740 WR* 10 41 17.5158425712 -59 40 36.895992960 5.68 6.50 6.42 7.38   WN7h+O9III-V 397 0
19 HD 93131 WR* 10 43 52.2579213120 -60 07 04.019676456 5.52 6.43 6.48 7.46   WN6ha-w 287 0
20 HD 93162 WR* 10 44 10.3890266112 -59 43 11.106500520 7.90 8.55 8.80 8.66   O2.5If*/WN6+OB 348 1
21 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 951 2
22 WR 28 WR* 10 48 58.7233875624 -59 03 37.305467496   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 117 0
24 WR 34 WR* 11 00 06.4565444280 -61 26 30.107994972   15.26 14.50     WN5-w 33 0
25 WR 35 WR* 11 00 21.8549644416 -61 13 52.417245540   14.460 13.574 13.453   WN6h-w 32 0
26 WR 36 WR* 11 02 32.9786756376 -59 26 20.909947272   13.90 12.94 12.86   WN5-s 33 0
27 WR 37 WR* 11 05 13.9026194544 -61 20 41.185677192   17.40 16.0     WN4-s 37 0
28 HD 96548 WR* 11 06 17.2032351624 -65 30 35.241182028 7.10 7.80 7.70 8.49   WN8h 403 0
29 MR 39 WR* 11 16 57.8368404744 -59 26 23.893309392   13.04 12.79 12.71   WN4-w 51 0
30 HD 104994 WR* 12 05 18.7204232424 -62 03 10.140656832 9.95 10.94 10.93 11.03   WN3p-w 161 0
31 HD 311884 WR* 12 43 50.9991209208 -63 05 14.812489320 11.45 11.64 10.81 10.59   WN6+O5V 164 0
32 WR 49 WR* 13 13 51.3091810056 -65 18 08.898073056   13.59 13.40 13.51   WN5(h)-w 40 0
33 MR 45 WR* 13 18 23.3593835760 -62 28 21.220535604   15.53 14.32 13.97   WN4-w 45 0
34 MR 48 WR* 13 32 43.7633368296 -65 01 27.837319620 12.85 13.20 12.73 12.61   WN5-w 53 0
35 HD 117688 WR* 13 33 30.1197052368 -62 19 01.214335740 8.69 10.81 10.90 10.44   WN7 124 0
36 MR 53 WR* 14 13 03.5252119752 -65 26 52.707986592 11.93 12.51 12.32 12.21   WN5-w 70 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 57.7186057272 -59 50 30.215432688 12.13 12.19 11.34 11.08   WN8(h) 102 0
40 MR 55 WR* 15 15 32.6272277376 -59 02 30.695283672 12.46 12.56 11.84 11.63   WN6-w 68 0
41 HD 143414 WR* 16 03 49.3455286488 -62 41 35.941627680 9.32 10.03 10.10     WN6-w 109 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 26.2279587024 -51 32 06.061114140   11.46 10.50 10.74   WN6-s 108 0
44 HD 151932 WR* 16 52 19.2477039480 -41 51 16.270066224 6.06 6.79 6.51 7.64   WN7h 302 0
45 WRAY 15-1600 WR* 17 04 04.6348092696 -45 12 15.057174564 12.95 13.00 11.55 11.85   WN7(h) 44 0
46 MR 67 WR* 17 10 54.6274683720 -46 36 00.577401516   13.15 12.50 12.28   WN6 38 0
47 THA 31-1 WR* 17 11 21.7008844704 -39 53 21.976096632   14.18 13.01 12.54   WN7 38 0
48 LS 3982 WR* 17 14 27.1191622584 -39 45 47.051105904 10.63 10.95 10.41     WN6h-w 66 0
49 WRAY 15-1666 WR* 17 18 52.8750705984 -38 50 03.606746928 13.93 13.27 11.83 11.43   WN7 69 0
50 CD-38 11746 WR* 17 19 00.5232022104 -38 48 51.247595664 13.01 12.48 11.02 10.55   WN8h 93 0
51 WR 91 WR* 17 20 22.0229832912 -38 56 48.381120240   17.70 16.2     WN7 34 0
52 HD 158860 WR* 17 33 07.0670597184 -33 38 23.495487072   12.20 10.69 10.38   WN5-w 50 0
53 HD 318139 WR* 17 42 09.7606723248 -32 33 24.800937012   13.93 12.78 12.20   WN7 45 0
54 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 13084 0
55 V* V3893 Sgr WR* 17 45 47.5405102320 -26 10 26.779355616   15.13 14.20 14.23   WR 112 1
56 EM* AS 268 WR* 18 02 23.4574037952 -23 34 37.491692196   14.38 12.31 11.43   WN9h 99 0
57 SS73 123 WR* 18 04 46.0978039968 -21 51 27.175412880   15.00 13.51 12.80 11.35 WN8 29 0
58 HD 313846 WR* 18 05 25.7344895280 -23 00 20.334949992 10.48 10.69 9.89 9.89   WN9h+OB 128 0
59 HD 165688 WR* 18 07 56.9609461704 -19 23 56.863324824 10.46 10.31 9.87 9.85   WN5-6b 150 0
60 MR 87 WR* 18 25 30.0135261024 -14 38 40.967308176 13.38 13.09 11.86 11.33   WN6-w 78 0
61 EM* AS 306 WR* 18 27 04.2926310240 -12 22 52.676112720   14.79       WN8h 45 0
62 MR 89 WR* 18 41 00.8670061488 -04 26 14.484137676 13.1 12.97 11.93 11.67   WN7 69 2
63 HD 177230 WR* 19 03 59.0233422072 -04 19 01.910240688 11.32 11.60 11.12     WN8 165 0
64 Hen 2-427 WR* 19 11 30.8749167768 +16 51 38.200938264   12.19 11.50     WN8h 328 0
65 HD 186943 WR* 19 46 15.9393580368 +28 16 19.077099276 9.86 10.50 10.23     WN3+O9.5V 182 1
66 MR 96 WR* 19 48 18.2649812592 +30 26 52.672284420   13.3 13.4     WN4-w 34 0
67 HD 187282 WR* 19 48 32.1967360032 +18 12 03.695582124 9.60 10.49 10.51     WN4(h)-w 190 0
68 EM* AS 374 WR* 19 59 12.5931809928 +31 27 09.025581132   13.57 12.13 11.52   WN8(h) 62 1
69 MR 97 WR* 20 00 19.1223016752 +33 15 51.099973956 12.93 13.050 12.080     WN7h 76 0
70 HD 190918 WR* 20 05 57.3244526328 +35 47 18.150756792 6.11 6.88 6.75     WN5+O9I 358 0
71 HD 191765 WR* 20 10 14.1928045152 +36 10 35.070683376 7.64 8.08 8.08     WN6-s 434 0
72 HD 192163 WR* 20 12 06.5418877464 +38 21 17.784181008 7.12 7.49 7.50     WN6(h)-s 533 0
73 HD 193077 WR* 20 17 00.0260987184 +37 25 23.785483116 7.82 8.32 8.01 8.71   WN5-w+B? 284 0
74 HD 193576 WR* 20 19 32.4229160448 +38 43 53.959035756 8.15 8.53 8.00     WN5+O6II-V 693 0
75 HD 193928 WR* 20 21 31.7290073688 +36 55 12.773070696 10.67 10.60 9.78     WN5-w+O5V-III 192 0
76 WR 142 WR* 20 21 44.3438785440 +37 22 30.544989960   14.39 12.99 12.73 11.04 WO2 126 0
77 EM* AS 431 WR* 20 36 43.6322747712 +40 21 07.442607924     13.73 12.51   WN8(h)+B0.5V 215 0
78 HD 197406 WR* 20 41 21.5485520640 +52 35 15.142636896 10.42 10.87 10.30     WN8h+B3IV/BH 191 0
79 WR 149 WR* 21 07 11.6933616840 +48 25 36.238552680   15.90 14.70     WN5-s 42 0
80 MR 114 WR* 22 09 33.4430950032 +57 44 30.527883600 12.78 12.946 12.078 11.853   WN4+O5V 136 0
81 HD 211564 WR* 22 16 24.0318845736 +55 37 36.767570232   11.72 11.61     WN3(h)-w 117 0
82 HD 214419 WR* 22 36 53.9548302648 +56 54 20.989190232 8.68 9.21 8.80     WN6o+O9Ib/II 366 1
83 MR 119 WR* 23 00 10.1253892224 +60 55 38.410870260 11.85 11.949 10.844 10.520   WN8h 94 0
84 HD 219460B WR* 23 15 12.5454190406 +60 27 01.000751310   11.32 10.75     WN5 8 0
85 EM* AS 513 WR* 23 43 30.5960809392 +61 55 48.139591872 12.02 11.98 11.282     WN7h+Be? 68 0

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2022.08.10-07:03:40

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