2020A&A...638A.157H


Query : 2020A&A...638A.157H

2020A&A...638A.157H - Astronomy and Astrophysics, volume 638A, 157-157 (2020/6-1)

The IACOB project. VI. On the elusive detection of massive O-type stars close to the ZAMS.

HOLGADO G., SIMON-DIAZ S., HAEMMERLE L., LENNON D.J., BARBA R.H., CERVINO M., CASTRO N., HERRERO A., MEYNET G. and ARIAS J.I.

Abstract (from CDS):


Context. The apparent lack of massive O-type stars near the zero-age main sequence, or ZAMS (at ages <2Myr), is a topic that has been widely discussed in the past 40 yr. Different explanations for the elusive detection of these young massive stars have been proposed from the observational and theoretical side, but no firm conclusions have been reached yet.
Aims. We reassess this empirical result here, benefiting from the high-quality spectroscopic observations of (more than 400) Galactic O-type stars gathered by the IACOB and OWN surveys.
Methods. We used effective temperatures and surface gravities resulting from a homogeneous semi-automatizedIACOB-GBAT/FASTWIND spectroscopic analysis to locate our sample of stars in the Kiel and spectroscopic Hertzsprung-Russell (sHR) diagrams. We evaluated the completeness of our magnitude-limited sample of stars as well as potential observational biases affecting the compiled sample using information from the Galactic O star catalog. We discuss limitations and possible systematics of our analysis method, and compare our results with other recent studies using smaller samples of Galactic O-type stars. We mainly base our discussion on the distribution of stars in the sHR diagram in order to avoid the use of still uncertain distances to most of the stars in our sample. However, we also performed a more detailed study of the young cluster Trumpler-14 as an illustrative example of how Gaia cluster distances can help to construct the associated classical HR diagram.
Results. We find that the apparent lack of massive O-type stars near the ZAMS with initial evolutionary masses in the range between ~=30 and 70M still persist even when spectroscopic results from a large non-biased sample of stars are used. We do not find any correlation between the dearth of stars close to the ZAMS and obvious observational biases, limitations of our analysis method, and/or the use of one example spectroscopic HR diagram instead of the classical HR diagram. Finally, by investigating the effect of the efficiency of mass accretion during the formation process of massive stars, we conclude that an adjustment of the mass accretion rate towards lower values than canonically assumed might reconcile the hotter boundary of the empirical distribution of optically detected O-type stars in the spectroscopic HR diagram and the theoretical birthline for stars with masses above ~=30M. Last, we also discuss how the presence of a small sample of O2-O3.5 stars found much closer to the ZAMS than the main distribution of Galactic O-type star might be explained in the context of this scenario when the effect of nonstandard star evolution (e.g. binary interaction, mergers, and/or homogeneous evolution) is taken into account.

Abstract Copyright: © ESO 2020

Journal keyword(s): stars: early-type - stars: massive - Hertzsprung-Russell and C-M diagrams - stars: evolution - stars: formation - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/638/A157): tablee1.dat>

Simbad objects: 159

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Number of rows : 159
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 V* V747 Cep SB* 00 01 46.8678793584 +67 30 25.102332180 11.6 11.38 10.07     O5.5V(n)((f)) 48 0
2 BD+66 1675 * 00 02 10.2887046096 +67 24 32.228861796 10.18 10.16 9.08     O7.5Vz 85 0
3 HD 108 SB* 00 06 03.3890541936 +63 40 46.771220928 6.79 7.58 7.40     O4-8f?p 315 0
4 HD 229 * 00 06 53.6551889664 -56 50 48.344075520   10.532 9.602     K1III 12 0
5 HD 228 * 00 06 56.3409924504 -43 59 06.803241792   8.898 8.744     G8III 17 0
6 V* AO Cas SB* 00 17 43.0633133256 +51 25 59.116450728 5.04 6.01 6.14     O9.2II+O8V((f)) 322 0
7 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11841 1
8 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5510 1
9 HD 15137 SB* 02 27 59.8113542520 +52 32 57.589857672 7 7.92 7.86     O9.5II-IIIn 120 0
10 BD+60 497 Y*O 02 31 57.0901516200 +61 36 43.948697940 10.466 9.39 8.85     O6.5V((f))+O8/B0V 101 0
11 HD 15558 Y*O 02 32 42.5366901168 +61 27 21.572901360 7.82 8.37 7.87 7.34 6.94 O4.5III(f) 308 0
12 HD 16429 SB* 02 40 44.9492589168 +61 16 55.995618720 7.91 8.29 7.67     O9.5III+F4V 159 1
13 HD 17505 ** 02 51 07.97514 +60 25 03.8720 6.83 7.47 7.07     O6.5III((f))n+O8V 188 0
14 HD 17520 ** 02 51 14.4527711976 +60 23 10.057239852 7.86 8.54 8.24 7.96 7.73 O9.2Ve+O8Vz 138 0
15 HD 18326 ** 02 59 23.1709737312 +60 33 59.519691216 9.211 8.21 7.94     O6.5V((f))z+O9/B0V: 123 0
16 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 6325 1
17 V* CC Cas SB* 03 14 05.3361655368 +59 33 48.485582712 7.07 7.56 7.08     O8.5III(n)((f)) 278 0
18 V* X Per HXB 03 55 23.0777456088 +31 02 45.039836148 6.090 6.840 6.720     O9.5III 937 0
19 BD+56 864 SB* 03 59 18.2933470368 +57 14 13.757279424 10.837 9.93 9.80     O5.5V(n)+O6.5V(n) 48 0
20 LS V +38 12 * 05 20 00.6489369168 +38 54 43.505492400 11.23 10.82 10.40     O7V((f))+B0III-V 15 0
21 HD 242908 Y*O 05 22 29.3024469216 +33 30 50.454124452 8.6 9.280 9.084 9.241   O4.5V(n)((fc))z 119 0
22 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16071 1
23 HD 35921 EB* 05 29 42.65002 +35 22 30.0896 6.23 6.96 6.85     O9II 235 0
24 * tet01 Ori C SB* 05 35 16.4662967280 -05 23 22.921811880 4.20 5.15 5.13 4.91 4.73 O7Vp 1349 1
25 * tet02 Ori A SB* 05 35 22.9012398264 -05 24 57.832632108 5.37 6.30 6.39 6.30 6.35 O9.5IVp 522 0
26 * iot Ori SB* 05 35 25.9819073 -05 54 35.643537 1.45 2.53 2.77     O9IIIvar 752 0
27 RMC 136 Cl* 05 38 42.396 -69 06 03.36           ~ 1862 1
28 * sig Ori Y*O 05 38 44.7653828520 -02 36 00.283179888 2.54 3.58 3.79 3.87 4.11 O9.5V+B0.2V(n) 775 0
29 HD 37366 SB* 05 39 24.8024332824 +30 53 26.763532368 6.99 7.71 7.64     O9.5IV 75 0
30 HD 39680 Be* 05 54 44.7315378936 +13 51 17.064365364 7.05 8.01 7.99     O6V:[n]pevar 117 0
31 HD 45314 Be* 06 27 15.7784072112 +14 53 21.212913660 5.91 6.79 6.64     O9:npe 163 0
32 HD 46106 Y*O 06 31 38.3968383096 +05 01 36.396422796 7.33 8.08 7.93 7.76 7.66 O9.7III(n) 146 0
33 HD 47129 SB* 06 37 24.0420854544 +06 08 07.369104444 5.23 6.11 6.06     O8I+O7.5III 376 0
34 HD 48099 Be* 06 41 59.2308626256 +06 20 43.532571372 5.38 6.32 6.37 6.30 6.35 O5V((f))z+O9:V 285 0
35 HD 54662 SB* 07 09 20.2493151288 -10 20 47.635088964 5.35 6.24 6.21 7.23   O6.5Vz(n)+O7.5Vz 333 2
36 * 29 CMa SB* 07 18 40.3789353696 -24 33 31.318248528 3.80 4.80 4.95 4.95 5.08 O7Iafpvar 407 0
37 * tau CMa SB* 07 18 42.4864191 -24 57 15.741299 3.26 4.25 4.40 4.44 4.62 O9II 411 0
38 HD 57236 SB* 07 19 30.1024120872 -22 00 17.279067852 8.21 8.90 8.80 9.41   O8.5V 57 1
39 HD 60848 Be* 07 37 05.7325392528 +16 54 15.300327852 5.55 6.67 6.87     O8:V:pe 134 0
40 HD 64315 Em* 07 52 20.2837438416 -26 25 46.683933780 8.76 9.49 9.24 9.63 8.86 O5.5Vz+O7V 111 1
41 CD-28 5104 s*b 07 55 52.8512069760 -28 37 46.791254424 9.39 10.13 9.94 10.12   O6Ifp 77 0
42 * zet Pup BY* 08 03 35.04754 -40 00 11.3321 0.89 1.98 2.25 2.36 2.58 O4I(n)fp 1126 1
43 HD 69106 * 08 14 03.7995306624 -36 57 07.938057852 6.12 7.020 7.128 8.02   O9.7IIn 116 0
44 HD 75759 SB* 08 50 21.0167636904 -42 05 23.247034188 4.95 5.90 6.00 7.18   O9V+B0V 133 0
45 HD 92206 ** 10 37 22.245 -58 37 22.86 7.46         O6.5V((f))+O6.5V((f)) 74 0
46 HD 92206A * 10 37 22.2806454192 -58 37 22.852573968   8.315 8.219 9.014   O6V((f))z 16 0
47 HD 92206B * 10 37 22.9650846624 -58 37 22.959552000 8.48         O6V((f))z 24 0
48 V* V725 Car EB* 10 43 30.8371202256 -59 29 23.879203368 9.66 10.29 10.08 10.06   O9.7IV 35 0
49 CPD-58 2608A * 10 43 41.2298355888 -59 35 48.162428916 10.935 10.98 10.42 10.76 9.92 O7.5Vz 20 0
50 CD-58 3526 * 10 43 46.6855999968 -59 32 54.846500640 9.161 9.884 9.593 9.84 9.13 O6V((f))z 64 0
51 Cl Trumpler 14 21 SB* 10 43 48.6941418096 -59 33 24.351520752 10.467 11.122 10.774   10.106 O9V 44 0
52 HD 93128 SB* 10 43 54.3957741024 -59 32 57.497266716 8.82 8.97 8.77 9.40 8.71 O3.5V((fc))z 93 1
53 Cl Trumpler 14 OpC 10 43 57 -59 33.2   5.70 5.5     ~ 469 0
54 HD 93129 ** 10 43 57.462360 -59 32 51.27000 6.26 7.840 7.884 7.839   O2If*+O3.5V((f)) 195 1
55 HD 93129B * 10 43 57.6453994104 -59 32 53.765064780   10.40 8.84     O3.5V((f)) 65 0
56 CD-58 3529 * 10 43 59.9072622960 -59 32 25.452459240 8.631 9.439 9.286 9.73 9.11 O7V((f))z 21 0
57 Cl Collinder 228 OpC 10 44 00 -60 05.2   4.58 4.4     ~ 197 0
58 V* V661 Car EB* 10 44 00.3711575208 -59 52 27.521778900 7.60 8.31 8.04 8.75   O6.5III(f) 139 0
59 CPD-58 2625 * 10 44 00.9232424712 -59 35 45.798105192 10.425 11.050 10.670   9.958 O9.2V 42 1
60 CPD-58 2627 * 10 44 02.4460555080 -59 29 36.783166884 9.72 10.17 10.00 10.19   O9.5V(n) 26 0
61 HD 93160 SB* 10 44 07.2603347496 -59 34 30.623536272 7.27 7.99 7.60 8.46   O7III((f)) 107 0
62 HD 93161A SB* 10 44 08.8380609288 -59 34 34.509718560 7.33 8.619 8.581 8.61   O7.5V+O9V 39 1
63 HD 93161 SB* 10 44 08.972 -59 34 34.88 7.39 7.96 7.87     O8V+O9V+O6.5(f) 92 0
64 HD 93161B * 10 44 09.0755469120 -59 34 35.393294136   8.658 8.641     O6.5IV((f)) 14 1
65 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
66 HD 93206 EB* 10 44 22.9085235888 -59 59 35.970489960 5.53 6.37 6.24 7.42   O9.7Ibn 204 0
67 TYC 8626-2506-1 * 10 44 30.2282857992 -59 26 12.954990876   11.52 10.90     O9V(n) 9 0
68 V* V560 Car SB* 10 44 33.7393258944 -59 44 15.434446956 6.89 7.80 7.75 7.56 7.46 O3.5V((f))+O8V 289 0
69 HD 303311 SB* 10 44 37.4602634976 -59 32 55.460525100 8.30 9.042 8.979 9.58 9.09 O6V((f))z 78 0
70 C 1042-593 OpC 10 44 39.00 -59 33 36.0     6.8     ~ 62 0
71 Cl Trumpler 15 OpC 10 44 42 -59 22.1   7.41 7.0     ~ 193 0
72 HD 93249 PM* 10 44 43.8755766936 -59 21 25.141338252 7.75 8.78 8.20 9.20   O9III 88 0
73 HD 93250 * 10 44 45.0275085072 -59 33 54.680974848 6.73 8.12 7.50 8.38   O4III(fc) 302 0
74 V* V572 Car EB* 10 44 47.3048862456 -59 43 53.277923784 8.17 8.96 8.81 9.45   O7.5V(n)z+B0V(n) 162 1
75 Cl Trumpler 16 OpC 10 45 01 -59 42.0   5.35 5.0     ~ 454 0
76 HD 93343 * 10 45 12.2210285688 -59 45 00.441008892 9.01 9.76 9.558 9.17 8.76 O8Vz 80 0
77 V* V731 Car EB* 10 45 12.7214663496 -59 44 46.149112428 8.739 9.472 9.229 9.65 8.699 O8V(n)+O9.5V 86 0
78 CPD-59 2636 SB* 10 45 12.8686809888 -59 44 19.205057544 8.913 9.559 9.218   8.535 O8V+O8V 71 0
79 CD-59 3310 SB* 10 45 16.5181708560 -59 43 37.050828744 8.842 9.542 9.219 9.65 8.585 O6V((fc)) 86 0
80 HD 93403 SB* 10 45 44.1198371784 -59 24 28.153300860 6.72 8.46 8.27 8.35   O5.5III(fc)var 188 1
81 MR 32 WR* 10 58 45.4633977552 -61 10 42.955415616   11.56 11.04 10.45   O5Ifp 30 0
82 HD 96264 * 11 04 55.5014861880 -61 03 05.790816756 6.60 7.54 7.62 8.49   O9.5III 65 0
83 HD 96670 SB* 11 07 13.9342973568 -59 52 23.180506824 6.86 7.60 7.43 8.38   O7V(f)n 82 1
84 HD 97166 SB* 11 10 05.9922642600 -60 14 56.890907952 7.15 9.26 8.91 8.70   O7.5IV((f))+O9III: 51 0
85 NGC 3603 OpC 11 15 11 -61 15.5           ~ 1013 1
86 V* TU Mus EB* 11 31 10.9241479224 -65 44 32.099167788 7.58 9.52 9.34 9.25   O8V(n)z+B0V(n) 160 0
87 V* V1051 Cen EB* 11 37 48.4343499072 -63 19 23.518561512 6.28 7.18 7.16 8.11   O5.5V((f))+O8:V 141 1
88 HD 101205 EB* 11 38 20.36114 -63 22 21.8889 5.64 6.53 6.54 7.41   B7/8Ib 152 0
89 HD 101436 ** 11 39 49.9553334624 -63 28 43.549419180 6.8 8.98 8.93 8.78   O6.5V((f)) 133 1
90 HD 114886 ** 13 14 44.38260 -63 34 51.8077 6.15 6.98 6.89 7.76   O9-B0V 96 0
91 V* V961 Cen SB* 13 16 04.8010592232 -62 35 01.490795556 7.51 9.16 9.32 8.82   O9.5III+B0Ib 99 1
92 HD 115455 SB* 13 18 35.3592390638 -62 29 28.407889555 7.40 8.17 7.97 8.81   O8III((f)) 98 1
93 HD 117856 * 13 34 43.40546 -63 20 07.6319 6.92 8.97 8.90 8.29   O9.7II-III 48 0
94 HD 120678 Em* 13 52 56.4133904568 -62 43 14.260321632 7.04 9.45 8.20 9.02   O9.5Ve 68 1
95 HD 123590 * 14 10 43.9689754248 -62 28 44.450066712 6.93 9.21 8.84 8.68   O8Vz 38 0
96 HD 124314 ** 14 15 01.60615 -61 42 24.3831   8.96 6.64 6.45 6.31 O6V(n)((f)) 141 1
97 HD 125206 * 14 20 09.0397470528 -61 04 54.621382980 7.47 8.18 7.92 8.89   O9.7IVn 64 1
98 * del Cir SB* 15 16 56.8959099600 -60 57 26.120078136 4.11 5.03 5.09 6.68   O8V 151 0
99 HD 148937 SB* 16 33 52.3869185520 -48 06 40.476418740 6.49 7.12 6.71 7.61   O6f?p 371 4
100 HD 149404 s*b 16 36 22.5628499784 -42 51 31.902127776 5.23 5.88 5.52 6.90   O8.5Iab(f)p 237 1
101 HD 150135 * 16 41 19.4443334664 -48 45 47.568769200 6.19 7.00 6.88 7.33   O6.5V((f))z 117 0
102 HD 150136 SB* 16 41 20.4155898816 -48 45 46.730465028 4.98 5.78 5.65 6.93   O3.5-4III(f*)+O6IV 181 0
103 HD 151003 * 16 46 34.1955926208 -41 36 38.522639052 6.49 7.26 7.09 8.00   O8.5III 67 1
104 HD 150958 ** 16 46 38.8728467256 -47 05 24.623668536 7.01 7.64 7.30 8.22   O6.5Ia(n)f 82 1
105 HD 152219 EB* 16 53 55.6078109256 -41 52 51.496403268 6.950 7.705 7.569   7.267 O9.5III(n) 102 0
106 HD 152218 EB* 16 53 59.9905195488 -41 42 52.817214240 7.02 7.78 7.570   7.243 O9IV+B0:V: 143 0
107 HD 152246 SB* 16 54 05.2976157264 -41 04 46.117795944 6.69 7.45 7.29 8.19   O9IV 119 1
108 HD 152248 EB* 16 54 10.0618206816 -41 49 30.139291596 5.56 6.15 6.088     O7Iabf+O7Ib(f) 244 0
109 CD-41 11037 SB* 16 54 13.2253067352 -41 50 32.518100184 7.21 8.08 7.90     O9IV 73 0
110 HD 152314 Y*? 16 54 32.0048577720 -41 48 18.848961036 7.256 7.974 7.749 9.01 7.446 O9IV 106 0
111 HD 152408 s*b 16 54 58.5051071856 -41 09 03.093075612 5.17 5.92 5.77 7.00   O8Iape 362 0
112 HD 152386 s*b 16 55 06.4499424072 -44 59 21.364771956 8.15 8.64 8.13 8.84   O6:Iafpe 79 0
113 HD 153426 * 17 01 13.0078001616 -38 12 11.886304536 6.79 7.61 7.47 8.49   O8.5III 92 0
114 HD 153919 HXB 17 03 56.7725629224 -37 50 38.913331452 6.06 6.78 6.51 6.08 5.90 O6Iafcp 781 1
115 HD 155806 Be* 17 15 19.2478670712 -33 32 54.299379012 4.61 5.52 5.53     O7.5V((f))z(e) 217 0
116 V* V1012 Sco EB* 17 15 22.3245385176 -38 12 46.690529760 5.87 8.66 8.61 7.83   O9.7III(n) 59 0
117 HD 156292 SB* 17 18 45.8116958160 -42 53 29.928425568 7.13 7.75 7.55 8.42   O9.7III 64 0
118 HD 319703 * 17 19 46.1639892408 -36 05 52.337458248 11.9 11.73 10.92 10.46 9.30 O7V((f))z 59 0
119 HD 319702 Y*O 17 20 50.6128007664 -35 51 46.033836192 10.94 11.04 10.11 10.10   O8III 50 0
120 HD 323110 s*b 17 21 15.7981421496 -37 59 09.547362060 10.96 11.05 9.96 9.70   ON9Ia 26 0
121 HD 319718 ** 17 24 43.490 -34 11 57.03 12.28 11.94 10.44 10.05   O3.5If* 85 0
122 V* V1081 Sco EB* 17 29 12.9252525072 -31 32 03.427372140 6.22 7.07 7.04 7.93   O9.5V(n) 84 0
123 HD 161853 ** 17 49 16.5582018192 -31 15 18.068754204 7.48 8.11 7.97 8.81   O8V(n)z+B 72 2
124 NAME Her 36SE SB* 18 03 40.3201232304 -24 22 42.857540472 10.26 11.022 10.372 10.267   O7:V 185 0
125 HD 164816 Be* 18 03 56.8425865728 -24 18 45.118050552 6.17 7.006 6.986 8.08 6.989 O9.5V+B0V 145 0
126 HD 165052 SB* 18 05 10.5506592816 -24 23 54.847798080 6.16 6.98 6.87 7.77   O5.5:Vz+O8:V 257 1
127 HD 313846 WR* 18 05 25.7344895280 -23 00 20.334949992 10.48 10.69 9.89 9.89   WN9h+OB 128 0
128 * 11 Sgr Or* 18 09 17.6999100192 -23 59 18.231196056 6.65 7.45 7.31 8.36   O7V(n)z+B0:V: 134 2
129 HD 166734 s*b 18 12 24.6551425392 -10 43 53.060750040 9.36 9.49 8.42 7.33 6.47 O7.5Iabf 168 0
130 * 16 Sgr SB* 18 15 12.9690278832 -20 23 16.691046360 5.25 6.05 6.02 5.94 5.86 O9.5III 184 0
131 HD 167771 SB* 18 17 28.5570708120 -18 27 48.424975128 5.81 6.65 6.54 7.43   O7III((f))+O8III 177 0
132 HD 167971 s*b 18 18 05.8947362832 -12 14 33.313601112 7.89 8.27 7.50 6.68 6.279 O8Iaf(n)+O4/5 285 0
133 HD 168075 SB* 18 18 36.0418343184 -13 47 36.449731536 8.62 9.22 8.77 9.45   O7V(n)((f))z 137 0
134 HD 168137 SB* 18 18 56.1894798360 -13 48 31.092549588 8.72 9.36 8.94 9.55   O8Vz 116 0
135 2MASS J18210223-1601010 Y*O 18 21 02.2332989664 -16 01 01.007289984 10.28 10.61 9.98 9.95   O5.5V((f))z 47 0
136 BD-14 5014 * 18 22 22.318 -14 37 08.46 10.8 11.03 10.15 10.44   O7.5V(n)((f)) 32 0
137 V* V1182 Aql SB* 18 55 23.1255094080 +09 20 48.087475944 8.73 9.10 8.64     O7V(n)((f))z+B 110 0
138 NGC 6822 G 19 44 56.199 -14 47 51.29   18 8.1     ~ 1499 0
139 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4107 0
140 HD 191201 ** 20 07 23.6846928338 +35 43 05.890234225 6.66 7.43 7.34     O9III+O9V 113 0
141 HD 191612 SB* 20 09 28.6105997664 +35 44 01.286453904 7.40 8.07 7.80     O8fpe 227 0
142 HD 193322 ** 20 18 06.98820 +40 43 55.5001 5.17 5.94 5.84 5.69 5.68 O9IV(n)+B1.5V 272 0
143 HD 229196 Pu* 20 23 10.7840350992 +40 52 29.847533160 9.29 9.32 8.59     O6II(f) 114 0
144 HD 194649 SB* 20 25 22.1272777920 +40 13 01.206964704 9.86 9.93 9.07     O5.5V((f))+O7Vz 44 0
145 BD+45 3216A * 20 33 50.367 +45 39 40.95   9.96 9.60     O5V((f))z 4 0
146 LS III +46 11 s*b 20 35 12.6369328512 +46 51 12.108461292 12.46 12.295 10.926 10.005   O3.5If*+O3.5If* 30 0
147 LS III +46 12 * 20 35 18.5652236712 +46 50 02.913981468 11.07 11.217 10.262 9.640   O4.5IV(f) 28 0
148 V* Y Cyg SB* 20 52 03.5771840640 +34 39 27.486121104 6.31 7.23 7.32     O9.5IV+O9.5IV 361 1
149 HD 199579 SB* 20 56 34.7779063080 +44 55 29.000891928 5.16 6.01 5.96     O6.5V((f))z 354 0
150 HD 204827 SB* 21 28 57.7592315784 +58 44 23.238427956 8.63 8.74 7.94 7.25 6.76 O9.5IV 327 0
151 HD 206267 SB* 21 38 57.6195772032 +57 29 20.554016280 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 478 0
152 * 14 Cep SB* 22 02 04.5726270264 +58 00 01.309758516 4.77 5.551 5.542     O9IV(n)var+B1:V: 247 0
153 LS III +55 45 * 22 20 21.7733465688 +56 08 52.341006732 10.79 11.1 10.6     O7IV((f)) 13 0
154 HD 213023A * 22 26 52.3646255520 +63 43 04.912149324   9.729 9.047     O7.5Vz 5 0
155 HD 215835 SB* 22 46 54.1107754872 +58 05 03.533752788 8.24 8.85 8.629   8.049 O5.5V((f))+O6V((f)) 245 0
156 BD+55 2840 * 22 55 08.4862176048 +56 22 58.900350540 9.9 10.46 10.01     O7.5V(n) 25 0
157 LS III +56 109 SB* 22 55 44.9377506456 +56 28 36.644440404   11.11 10.68     O5.5V(n)((fc))+B 15 0
158 NAME Carina Region reg ~ ~           ~ 174 0
159 NAME Local Group GrG ~ ~           ~ 7679 0

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2022.07.05-08:08:04

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