2007A&A...465.1003M

Query : 2007A&A...465.1003M

2007A&A...465.1003M - Astronomy and Astrophysics, volume 465, 1003-1019 (2007/4-3)

The VLT-FLAMES survey of massive stars: wind properties and evolution of hot massive stars in the Large Magellanic Cloud.

MOKIEM M.R., DE KOTER A., EVANS C.J., PULS J., SMARTT S.J., CROWTHER P.A., HERRERO A., LANGER N., LENNON D.J., NAJARRO F., VILLAMARIZ M.R. and VINK J.S.

Abstract (from CDS):

We have studied the optical spectra of a sample of 28 O- and early B-type stars in the Large Magellanic Cloud, 22 of which are associated with the young star forming region N11. Our observations sample the central associations of LH9 and LH10, and the surrounding regions. Stellar parameters are determined using an automated fitting method (Mokiem et al., 2005A&A...441..711M), which combines the stellar atmosphere code fastwind (Puls et al., 2005A&A...435..669P) with the genetic algorithm based optimisation routine pikaia (Charbonneau 1995). We derive an age of 7.0±1.0 and 3.0±1.0Myr for LH9 and LH10, respectively. The age difference and relative distance of the associations are consistent with a sequential star formation scenario in which stellar activity in LH9 triggered the formation of LH10. Our sample contains four stars of spectral type O2. From helium and hydrogen line fitting we find the hottest three of these stars to be ∼49-54kK (compared to ∼45-46kK for O3 stars). Detailed determination of the helium mass fraction reveals that the masses of helium enriched dwarfs and giants derived in our spectroscopic analysis are systematically lower than those implied by non-rotating evolutionary tracks. We interpret this as evidence for efficient rotationally enhanced mixing leading to the surfacing of primary helium and to an increase of the stellar luminosity. This result is consistent with findings for SMC stars by Mokiem et al. (2006A&A...456.1131M). For bright giants and supergiants no such mass discrepancy is found; these stars therefore appear to follow tracks of modestly or non-rotating objects. The set of programme stars was sufficiently large to establish the mass loss rates of OB stars in this Z∼1/2Z☉ environment sufficiently accurate to allow for a quantitative comparison with similar objects in the Galaxy and the SMC. The mass loss properties are found to be intermediate to massive stars in the Galaxy and SMC. Comparing the derived modified wind momenta Dmom as a function of luminosity with predictions for LMC metallicities by Vink et al. (2001A&A...369..574V) yields good agreement in the entire luminosity range that was investigated, i.e. 5.0<logL/L☉<6.1.

Abstract Copyright: ∼

Journal keyword(s): galaxies: Magellanic Clouds - stars: atmospheres - stars: early-type - stars: fundamental parameters - stars: mass loss - stars: evolution

Simbad objects: 134

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Number of rows : 134
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11149 1
2 NGC 346 Cl* 00 59 04.4000 -72 10 39.000           ~ 490 0
3 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7066 0
4 [ELS2006] N11 097 * 04 55 17.6621004024 -66 27 35.695436076 14.516 14.994 14.961   14.789 B3II 6 0
5 LHA 120-S 4 Em* 04 55 17.8790296464 -66 31 49.817010432 13.396 14.78 14.69 14.75 14.286 B0:n(Be-Fe) 9 0
6 SK -66 15 * 04 55 22.3466106768 -66 28 19.100254044 11.888 12.660 12.894   12.759 B0.5Ia 17 0
7 [ELS2006] N11 089 EB* 04 55 28.3333772472 -66 29 41.810485380 14.288 14.819 14.867   14.860 B2III 9 0
8 SK -66 16 * 04 55 29.4146271192 -66 23 12.244739964 11.605 12.361 12.461   11.908 O9.7Ib 12 0
9 [ELS2006] N11 093 Pu* 04 55 29.9590344528 -66 30 37.660389228 14.180 14.783 14.930   15.062 B2.5III 7 0
10 [ELS2006] N11 107 SB* 04 55 32.9102754600 -66 32 31.492037256 14.217 14.830 14.942 15.32 15.355 B1-2+B 5 0
11 BI 26 * 04 55 32.9332368624 -66 25 27.897861648 12.613 13.388 13.446   13.501 B1Ib 16 0
12 [ELS2006] N11 030 * 04 55 48.3779395968 -66 29 41.640527256 12.783 13.580 13.720   13.957 B1e 3 0
13 [ELS2006] N11 109 * 04 55 49.1032224480 -66 27 39.161769408 15.071 15.174 16.956     B0.5Ib 8 0
14 [ELS2006] N11 119 SB* 04 55 49.4431091112 -66 26 03.702515208 14.014 15.215 15.137 15.47 15.424 B1.5V 7 0
15 [ELS2006] N11 072 * 04 55 51.6261590472 -66 21 57.848920668 13.563 14.435 14.565   14.841 B0.2V 12 0
16 [ELS2006] N11 058 * 04 55 52.3578837456 -66 34 13.574752212 13.090 13.953 14.197   14.422 O5.5V((f)) 8 0
17 [ELS2006] N11 102 * 04 55 53.8587404112 -66 34 29.581245912   14.79 14.95     B0.2V 8 0
18 SK -66 19 * 04 55 53.951 -66 24 59.35   14.98 14.87     O7V 24 0
19 [ELS2006] N11 116 * 04 55 54.8007767088 -66 27 41.954059044 14.469 15.123 15.214   15.260 B2III 7 0
20 [ELS2006] N11 104 * 04 55 55.2289356096 -66 21 57.552891660 14.222 14.850 15.218     B1.5V 8 0
21 SK -66 17 * 04 55 55.4935323072 -66 28 20.603403336 11.920 12.738 12.938   12.945 OC9.5II 7 0
22 [ELS2006] N11 029 * 04 55 56.3298710160 -66 29 04.278105240   13.51 13.63     OC9.7Ib 10 0
23 SK -66 18 Pu* 04 55 59.8226723496 -65 58 29.732367612 12.394 13.294 13.467   13.725 O6V((f)) 17 0
24 RMC 63 * 04 56 00.8925890544 -66 26 16.589782356 12.309 13.191 13.327   13.454 O6.5II(f)var 8 0
25 [ELS2006] N11 077 * 04 56 01.3596341664 -66 20 51.521381844 13.902 14.584 14.696   14.807 B2III 7 0
26 [ELS2006] N11 068 * 04 56 04.6016389344 -66 23 58.014437424 13.496 14.377 14.545   14.657 O7V((f)) 9 0
27 [ELS2006] N11 078 * 04 56 04.9408592904 -66 31 25.087483956 13.903 14.532 14.667   14.910 B2(Be-Fe) 5 0
28 [ELS2006] N11 111 * 04 56 05.8518036480 -66 21 55.116588276 14.151 14.935 15.129   15.372 B1.5III 7 0
29 SSTISAGEMC J045609.18-662708.5 * 04 56 09.1830652032 -66 27 08.628573780 13.874 14.614 14.821   14.949 B0.5V 7 0
30 [L72] LH 9-89 * 04 56 11.0176066200 -66 28 24.363611436 12.580 13.531 13.645   13.837 B0IIIn 10 0
31 SK -66 22 * 04 56 11.7105130200 -66 31 59.448742212 12.121 12.961 13.208   13.441 O8-9V-III((f)) 5 0
32 PGMW 1015 * 04 56 15.4596960528 -66 27 41.547611988 14.130 14.185 14.163   13.887 A0II 4 0
33 PGMW 1017 * 04 56 15.5465488008 -66 27 21.276695196   13.7 13.93     B0III 11 0
34 SK -66 25 * 04 56 17.2873778904 -66 31 03.974335824 11.719 12.591 12.638   12.852 O8Ib(f) 4 0
35 [ELS2006] N11 039 * 04 56 17.3175935064 -66 17 48.388739244 13.003 13.709 13.839   13.901 B2III 8 0
36 SK -66 23 * 04 56 17.5569600120 -66 18 18.954787860 12.504 13.144 13.089   13.358 B2.5Iab 14 0
37 [L72] LH 9-72 * 04 56 18.6121501800 -66 28 37.690448052 14.425 15.174 15.377   15.600 B0.5V 9 0
38 [L72] LH 9-79 * 04 56 19.3227419616 -66 27 01.960411536   14.16 14.40     O6.5V((f)) 11 0
39 [L72] LH 9-81 * 04 56 19.4651612880 -66 27 37.980088488 13.826 14.637 14.648   14.276 B0.5(Be-Fe) 6 0
40 PGMW 1052 * 04 56 22.3102142640 -66 28 05.083058244 12.899 13.665 13.764   13.730 B0III 10 0
41 [ELS2006] N11 047 Pu* 04 56 25.4436836472 -66 26 33.336186684 12.918 13.794 13.976   14.157 B0III 7 0
42 [L72] LH 9-73 EB* 04 56 29.5593006240 -66 28 20.980326828 12.994 13.821 14.035   14.247 O7.5V 7 0
43 [ELS2006] N11 051 Pu* 04 56 29.6988034392 -66 21 38.860019604 12.909 13.812 13.990   14.173 O5Vn((f)) 9 0
44 [ELS2006] N11 021 * 04 56 30.5685198288 -66 18 09.018319752 13.565 13.394 13.266   12.838 A7II 4 0
45 [L72] LH 9-67 * 04 56 30.9913107552 -66 28 41.271275820 13.188 14.012 14.194   14.443 O9V 8 0
46 [L72] LH 9-66 * 04 56 32.8852861632 -66 28 52.673333772 13.847 14.606 14.775   14.978 B1III 11 0
47 PGMW 3013 * 04 56 33.5537512944 -66 23 28.387006836 14.250 14.969 14.590   13.989 B0.2Ia 7 0
48 [ELS2006] N11 025 * 04 56 34.8395 -66 28 23.101   13.8 13.45     O8.5V 3 0
49 NGC 1761 As* 04 56 39 -66 29.0     9.94     ~ 99 0
50 PGMW 3042 * 04 56 39.1831546944 -66 24 50.028577128 13.590 14.514 14.461   14.708 O9.5Vn 11 0
51 PGMW 1291 SB* 04 56 39.3637508976 -66 28 59.444905332 13.944 14.665 14.900   15.027 B0.5V 7 0
52 [L72] LH 9-53 SB* 04 56 40.9576309608 -66 27 40.090528476 11.925 12.707 12.937   12.654 O9.5III+B1-2: 7 0
53 PGMW 3053 * 04 56 41.0475516240 -66 24 40.537858536   13.04 13.13     O6II(f+) 11 0
54 [ELS2006] N11 106 * 04 56 42.0804495648 -66 31 19.184196216 13.953 14.803 14.878   15.103 B0V 9 0
55 PGMW 3058 Pu* 04 56 42.1339871825 -66 24 54.713617412 12.901 14.092 14.089   13.991 O3V((f*)) 16 0
56 [L72] LH 10-3061 * 04 56 42.5074945536 -66 25 18.217550208 12.699 13.595 13.491   13.405 ON2III(f*) 25 0
57 [L72] LH 9-45 * 04 56 42.6732066768 -66 29 45.664980036 12.819 13.546 13.657   13.715 B0.5III 10 0
58 [L72] LH 9-41 * 04 56 43.7015625504 -66 28 36.745839912 13.916 14.562 14.840   14.962 B1V 10 0
59 PGMW 1346 SB* 04 56 43.950 -66 28 14.78 14.039 14.794 15.013   15.082 B1-2+B 5 0
60 PGMW 3086 * 04 56 44.2983133776 -66 23 05.089390116 14.408 15.099 15.222   15.361 B1.5V 8 0
61 PGMW 1351 * 04 56 44.5372241280 -66 30 03.800434212 14.536 15.109 15.624   15.305 B1Vn 9 0
62 [ELS2006] N11 046 * 04 56 44.6245232208 -66 34 20.862623244 12.874 13.850 13.856   14.109 O9.5V 8 0
63 PGMW 3100 * 04 56 45.2033296872 -66 25 10.776628056 13.007 13.736 13.648   13.547 O5III(f+) 12 0
64 PGMW 1378 SB* 04 56 46.3796040288 -66 27 16.734982824 13.981 14.779 14.970   15.084 B1V 5 0
65 PGMW 1379 ** 04 56 46.7304958608 -66 29 11.887218024 14.119 14.964 15.123   15.347 B0.5III 5 0
66 PGMW 3128 * 04 56 47.2162457064 -66 24 42.120879876   14.59 14.71     B0.2V 10 0
67 SK -66 30 * 04 56 48.0086445240 -66 20 10.231472832 12.365 12.972 13.046   12.529 B2Iab 12 0
68 [ELS2006] N11 020 * 04 56 50.3000363664 -66 31 03.909836244 12.177 13.019 13.178   13.198 O5I(n)f+ 5 0
69 [L72] LH 9-25 * 04 56 50.5116193272 -66 28 23.628488520 14.324 15.094 15.392   15.602 O9.5V 8 0
70 [ELS2006] N11 012 * 04 56 51.1569724272 -66 31 48.657636984 12.151 12.885 12.884   12.088 B1Ia 9 0
71 LHA 120-N 11 HII 04 56 51.4 -66 24 24           ~ 255 0
72 [L72] LH 9-23 ** 04 56 51.466752 -66 28 07.15512   13.115 12.554 12.544   F8: 5 0
73 NGC 1763 As* 04 56 51.5 -66 24 25     9.40     ~ 162 3
74 [ELS2006] N11 041 * 04 56 52.3254005808 -66 32 52.828418580 12.881 13.742 13.896   13.953 O6.5Iaf 3 0
75 [ELS2006] N11 026 * 04 56 52.5287243472 -66 19 56.230847832 12.646 13.405 13.580     O2.5III(f*) 14 0
76 [ELS2006] N11 027 * 04 56 53.1649257432 -66 19 02.313979680   14.24 13.56     G2 2 0
77 [ELS2006] N11 096 SB* 04 56 54.0660713688 -66 21 56.592824148 14.033 14.760 14.909   15.085 B1.5III 4 0
78 PGMW 3168 * 04 56 54.4599428448 -66 24 15.867618408   13.57 13.68     O7II(f) 16 0
79 PGMW 1480 EB* 04 56 54.4795272408 -66 27 32.001079248 13.154 13.965 14.145   14.082 B1:(Be-Fe) 6 0
80 PGMW 3173 * 04 56 54.7165572816 -66 24 54.515510316   14.56 14.71     O4-O6V 5 0
81 [ELS2006] N11 062 Pu* 04 56 55.3468257720 -66 33 02.188053612 13.338 14.142 14.274   14.415 B0.2V 7 0
82 [ELS2006] N11 066 Pu* 04 56 57.5049204216 -66 35 21.664009428 13.286 14.211 14.362   14.618 O7V((f)) 8 0
83 [ELS2006] N11 045 * 04 56 58.3147552632 -66 31 33.329857656   13.82 13.97     O9-9.5III 8 0
84 [ELS2006] N11 112 * 04 56 58.4959590576 -66 32 43.924090596   15.01 15.12     B1Vn 3 0
85 PGMW 3204 * 04 56 58.7897 -66 24 40.710   13.85 14.02     O6.5V((f)) 15 0
86 [ELS2006] N11 098 * 04 56 58.9709318760 -66 34 46.643962764 14.100 14.796 14.888   15.072 B2III 6 0
87 [ELS2006] N11 083 * 04 57 00.2516334072 -66 32 16.686135204 13.773 14.564 14.734   14.861 B0.5V 8 0
88 PGMW 3224 EB* 04 57 00.8732045736 -66 23 57.319318284 13.369 14.167 14.043   13.820 O6III 10 0
89 BI 42 Ro* 04 57 00.8846599752 -66 24 25.206714576 11.998 12.768 12.896 13.210 12.663 O8V 25 0
90 PGMW 1519 * 04 57 01.0669799736 -66 28 30.334803924 12.927 13.754 14.015   14.149 O7III+B0: 4 0
91 [ELS2006] N11 091 * 04 57 01.3055699040 -66 20 13.404303096 13.941 14.759 14.747   14.858 O9V 3 0
92 [ELS2006] N11 067 * 04 57 03.3346889448 -66 30 08.536387572 13.559 14.317 14.550   17.929 B0.5:Vn 3 0
93 SK -66 34 * 04 57 04.1020811616 -66 29 10.542275484 11.699 12.502 12.779     B1Ia 7 0
94 PGMW 3239 * 04 57 04.6124533752 -66 24 22.515518916 14.076 14.523 14.696   14.727 B3III 9 0
95 [ELS2006] N11 108 * 04 57 09.2992445712 -66 22 12.115996500 14.066 14.888 15.000   15.155 O9.5V 8 0
96 SV* HV 5500 * 04 57 10.5577002120 -66 18 07.229810376 13.504 14.335 14.153   13.591 O8-9IIIne 3 0
97 [ELS2006] N11 073 * 04 57 11.2604065416 -66 26 53.840986908 13.769 14.560 14.653   14.471 B0.5(Be-Fe) 5 0
98 [ELS2006] N11 064 SB* 04 57 11.4624078984 -66 22 19.087898664 13.601 14.266 14.627   14.646 B0.2:Vn 4 0
99 [ELS2006] N11 120 * 04 57 15.2119066824 -66 22 29.830811484   15.12 15.24     B0.2Vn 8 0
100 SV* HV 2241 V* 04 57 15.7351536912 -66 33 54.281614680   13.82 13.96     O6-8V-III((f)) 30 0
101 [ELS2006] N11 028 * 04 57 16.2396 -66 23 20.784   13.73 13.63     O6-8V 3 0
102 [ELS2006] N11 040 * 04 57 16.7206348296 -66 28 23.170742292 13.000 13.737 13.960   13.987 B0:IIIn 5 0
103 [ELS2006] N11 094 SB* 04 57 17.0773267032 -66 30 22.872741372 13.924 14.676 14.845   15.048 B1III 4 0
104 BI 45 * 04 57 17.6858852256 -66 26 31.561783080 12.309 12.759 12.73   11.895 B3Iab 12 0
105 [ELS2006] N11 054 * 04 57 18.3250220664 -66 25 59.692612800 13.361 14.065 14.107   14.098 B1Ib 9 0
106 [ELS2006] N11 075 * 04 57 22.0396539648 -66 19 21.027944388 13.910 14.579 14.671   14.837 B2III 8 0
107 [ELS2006] N11 071 * 04 57 24.1908613320 -66 26 00.041270784 13.642 14.466 14.618   14.725 O8:V 3 0
108 [ELS2006] N11 061 * 04 57 25.7192939592 -66 21 05.738996376 13.418 14.233 14.231   14.208 O9V 8 0
109 [ELS2006] N11 035 * 04 57 28.6954905696 -66 31 02.690283540 13.025 13.732 13.755   13.516 O9II(f) 6 0
110 [ELS2006] N11 082 EB* 04 57 32.4868355160 -66 29 49.398745488 13.880 14.603 14.812   14.870 B1-2+B 6 0
111 [ELS2006] N11 090 * 04 57 32.5144984080 -66 25 56.928757188 14.325 15.047 15.129   14.976 B2e 5 0
112 [ELS2006] N11 110 * 04 57 37.1078489736 -66 23 44.956664448 14.396 15.057 15.187   15.054 B1III 10 0
113 [ELS2006] N11 114 * 04 57 37.6874912736 -66 24 48.695230260   14.94 15.15     B0Vn 8 0
114 [ELS2006] N11 095 * 04 57 37.9111937424 -66 24 59.835919536   14.71 14.89     B1Vn 10 0
115 [ELS2006] N11 052 SB* 04 57 40.12 -66 26 02.7   13.88 14.06     O9.5V 4 0
116 [DMJ93] LH 13 62 EB* 04 57 40.5203166912 -66 27 25.157287512 13.139 14.040 14.118   14.183 O9:Vn 8 0
117 [ELS2006] N11 036 * 04 57 41.0084798592 -66 29 56.642184132 12.877 13.577 13.803   13.845 B0.5Ib 15 0
118 [ELS2006] N11 115 * 04 57 43.25 -66 24 38.0   15.01 15.15     B1III 7 0
119 [ELS2006] N11 117 * 04 57 44.4518517360 -66 23 59.461039284 14.342 15.073 15.224   15.387 B1Vn 7 0
120 [ELS2006] N11 099 * 04 57 46.6973130744 -66 28 28.165736352   14.82 14.93     B0.2V 6 0
121 [ELS2006] N11 056 ** 04 57 49.0500905808 -66 24 17.520611652 13.263 14.075 14.111   14.117 B1e 5 0
122 SK -70 69 * 05 05 18.6717716496 -70 25 49.874974104 12.586 13.616 13.854   14.074 O3V(f) 39 0
123 LH 30 As* 05 08 14 -69 13.4           ~ 9 0
124 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17434 0
125 SK -66 100 * 05 27 45.4472444328 -66 55 15.293259480 12.227 12.976 13.204   13.501 O6II(f) 44 0
126 NGC 2004 Cl* 05 30 41.340 -67 17 21.83   9.6       ~ 275 0
127 HD 269698 s*b 05 31 44.2080798984 -67 38 01.374839556 9.520 12.00 12.22 12.47 11.167 O4Ia 111 0
128 BI 237 * 05 36 14.6333257920 -67 39 19.168082640 12.865 13.790 13.830   13.948 O2V(f*) 35 0
129 BI 253 * 05 37 34.4595697440 -69 01 10.178659452 12.765 13.650 13.669   13.742 O2V(f*) 46 0
130 SK -68 137 * 05 38 24.6792593784 -68 52 32.951140752 12.243 13.274 13.346   13.242 OB 40 0
131 RMC 136 Cl* 05 38 42.396 -69 06 03.36   5.81 5.40     ~ 2019 2
132 * zet Oph Be* 16 37 09.5400587698 -10 34 01.509742704 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1839 0
133 HD 152003 s*b 16 52 47.3744351712 -41 47 08.990966004 6.90 7.47 7.08 6.72 6.35 O9.7IabNwk 120 1
134 HD 191423 * 20 08 07.1135347944 +42 36 21.962454480 7.43 8.19 8.03     ON9II-IIInn 111 0

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