2003A&A...406..119N

Query : 2003A&A...406..119N

2003A&A...406..119N - Astronomy and Astrophysics, volume 406, 119-130 (2003/7-4)

Stellar tracers of the Cygnus Arm. I. Spectroscopic study of bright photometric candidates.

NEGUERUELA I. and MARCO A.

Abstract (from CDS):

We present medium-resolution spectroscopy of a sample of stars in the second Galactic quadrant selected from the literature because their colours suggest that they are moderately-reddened early-type stars at very large distances. From the derived spectral types and observed colours, we calculate distances to all these objects. For a sizable fraction of our sample, we find distances well in excess of what is expected for Perseus Arm objects, even allowing for rather generous errors. In the interval l=150°-180°, there is a large number of objects with distances in excess of 4kpc, which are likely tracing the Outer or Cygnus Arm. In particular, we find that the association Cam OB3 is placed on this Arm. Based on our results, the extent and definition of the associations Cas OB4 and Aur OB2 need to be reevaluated.

Abstract Copyright: ∼

Journal keyword(s): stars: early-type - stars: distances - Galaxy: structure - open clusters and associations: general

Simbad objects: 87

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Number of rows : 87
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 BD+62 2353 * 00 02 22.7084701776 +62 54 03.184785864 9.54 10.07 9.9     B1II 19 0
2 HD 225146 s*b 00 03 57.5025246576 +61 06 13.094034012 8.32 8.96 8.60     O9.7Iab 87 0
3 BD+60 2664 * 00 04 02.5884925128 +60 50 55.593723336 10.51 10.99 10.62 10.66   B1V 15 0
4 BD+60 2664B * 00 04 02.9491195104 +60 50 45.050524368   10.98 10.65 10.62   B1.5V 5 0
5 BD+63 18 * 00 15 30.9559621512 +64 08 55.381423596 10.31 10.73 10.3     B0.2IIIe 16 0
6 LS I +62 99 * 00 25 44.3781407088 +62 46 43.137084900 11.58 11.7 11.4     B3Vn 10 0
7 LS I +61 153 * 00 26 02.6559922008 +61 19 20.265918528 10.59 11.24 11.09     B2III 13 0
8 Ass Cas OB 4 As* 00 27 +62.4           ~ 45 0
9 BD+61 90a SB* 00 28 37.7096445336 +62 29 17.695485960 9.67 10.39 10.20     B0.5V 11 0
10 BD+62 89 V* 00 29 49.2426923808 +63 04 04.045860840 10.08 10.62 10.25     B1.5Ve 24 0
11 LS I +62 119 * 00 31 42.4331053272 +62 40 47.915293692 11.53 12.06 11.75     Be? 8 0
12 NGC 869 OpC 02 18 57.8 +57 08 02           ~ 476 0
13 Ass Per OB 1 As* 02 21 +57.6           ~ 174 1
14 IC 1805 OpC 02 32 50.4 +61 28 16           ~ 519 1
15 LS I +60 247 * 02 39 05.6007994128 +60 23 57.369818688   11.60 10.94     B0.7II-III 11 0
16 Ass Cas OB 6 As* 02 43 +61.3           ~ 124 0
17 Ass Cam OB 1 As* 03 31.6 +58 38           ~ 94 0
18 BD+55 837 * 03 58 01.7263223856 +55 54 55.583154252 11.66 10.18 9.66     B1Ib: 28 0
19 Hilt 412 * 03 59 07.4899665432 +57 14 11.661837396 11.254 10.35 10.08     O8Vz 31 0
20 BD+56 864 SB* 03 59 18.2933470368 +57 14 13.757279424 10.837 9.93 9.80     O5.5V(n)+O6.5V(n) 50 0
21 BD+56 866 * 03 59 28.8804779616 +57 07 04.788060096 11.613 10.55 10.44     O9V 35 0
22 Ass Cam OB 3 As* 04 03 +56.7           ~ 26 0
23 HD 237211 s*b 04 03 15.6484849920 +56 32 24.874684872 10.579 9.41 9.05     O9.5Iab 44 0
24 HD 237213 s*b 04 04 24.5578033320 +56 00 19.465069860 11.19 9.39 8.74     B6Ia 45 0
25 HD 25914 s*b 04 09 23.2441416624 +57 05 28.256540388 8.31 8.56 8.07     B5Ia 49 0
26 Cl Waterloo 1 OpC 04 18 43.7 +52 51 47           ~ 73 0
27 HD 232947 s*b 04 25 24.5594670504 +53 24 55.143338904 9.56 9.85 9.33     B0Ia 32 0
28 LS V +56 59 SB* 04 27 56.6698565256 +56 26 51.291015612   11.19 10.92     B1V: 7 0
29 LS V +56 60 * 04 30 51.2979787128 +56 37 35.506726896   11.76 11.51     B2.5III 7 0
30 NGC 1624 OpC 04 40 36.0 +50 27 42     11.8     ~ 75 1
31 LBN 159.33+02.55 HII 04 56 05.5 +47 22 33           ~ 70 0
32 LBN 159.17+03.33 HII 04 58 45.70 +47 59 36.0           ~ 82 2
33 Ass Aur OB 1 As* 05 22 +33.9           ~ 83 0
34 NGC 1893 OpC 05 22 53.8 +33 26 38           ~ 261 0
35 Cl Stock 8 OpC 05 27 49.4 +34 27 07           ~ 84 0
36 HD 243827 * 05 28 09.5876971608 +33 18 47.244855564 10.56 10.9 10.7     B0.2III 18 0
37 Ass Aur OB 2 As* 05 28 +34.9           ~ 46 0
38 NGC 1931 OpC 05 31 23 +34 14.0     10.1     ~ 127 0
39 BD+39 1328 s*b 05 32 13.8496699896 +40 03 57.897493524 9.95 10.28 9.92     O8.5Iab(n)(f) 42 0
40 HD 248893 * 05 54 01.7787823656 +22 06 29.419643628 9.57 10.00 9.75     B0III 25 0
41 LS V +22 6 Em* 05 54 36.2228836296 +22 45 49.683919608   11.33 10.95     B1V 7 0
42 LS V +23 8 s*b 05 57 17.1784185768 +23 01 45.578005212   11.95 10.99     O8Iaf 8 0
43 GSC 01863-02063 * 05 58 16.0865980056 +22 55 59.334760596     12.33     B2.5III: 2 0
44 HD 252535 Y*? 06 09 50.1358526856 +20 37 05.262347460 9.54 10.26 10.26 10.16   B1.5V 26 0
45 HD 252991 V* 06 11 52.7142208080 +25 59 00.811870692   10.66 10.44 10.47   B0.3V 11 0
46 LS V +22 38 s*b 06 16 13.3274391960 +22 45 48.779291448 11.69 11.775 10.726 10.450   B0.2III: 28 1
47 LS V +19 2 V* 06 17 46.1239692096 +19 49 37.571198844 12.26 12.71 12.10 11.95   B1.5III: 11 0
48 LS V +22 50 Em* 06 20 00.5101845456 +22 09 48.932529012 11.13 11.69 11.47     B2IVe 14 0
49 Cl Bochum 1 OpC 06 25 18 +19 46.8   8.08 7.9     ~ 51 1
50 Ass Vul OB 2 As* 19 47.6 +28 49           ~ 28 0
51 HD 332907 Pu* 19 50 08.3255476296 +28 08 01.130961876 10.85 11.16 10.9     B0.7III 10 0
52 NAME Cyg Arm PoG 20 02 +40.0           ~ 160 0
53 LS III +46 19 SB* 20 41 10.5852282240 +46 34 51.706555356 11.68 11.99 11.38     B1V 12 0
54 LS III +45 54 * 21 11 12.3332332728 +45 31 31.555907292 11.51 11.5 11.1     B2Ib 12 0
55 LS III +46 50 * 21 12 00.4539299808 +46 41 51.344189700 11.07 11.41 10.69     O9.2II 13 0
56 LS III +47 39 * 21 24 38.0003216952 +48 00 38.656778400 12.67 11.78 11.75 11.55   B0.5V 16 0
57 LS III +47 41 * 21 25 00.3415064328 +48 00 25.585141716 13.42 13.15 12.36     B1III 10 0
58 LS III +47 49 * 21 37 25.7970046032 +47 57 56.738560500   11.91 12.26     B1II 7 0
59 LS III +55 19 * 21 57 49.2529311816 +56 12 27.004751424 10.86 11.2 10.8     B0III: 15 0
60 LS III +52 17 * 21 58 28.0307131656 +52 55 26.120452404 12.35 12.68 12.25     B2IV 9 0
61 LS III +52 19 * 21 58 47.6721993912 +52 54 58.811890788 11.99 12.48 12.04     BN1IIIe 8 0
62 LS III +55 20 * 22 02 40.8398897400 +55 15 06.303278988 11.59 11.6 10.9     BN0IV 11 0
63 LS III +59 19 * 22 03 43.6795497672 +59 58 45.793177428 11.22 11.7 11.1     B1.5III: 13 0
64 LS III +53 32 * 22 04 21.6550783560 +53 52 56.429754708 10.63 11.09 10.69     B2Ib 12 0
65 NGC 7235 OpC 22 12 19.9 +57 16 16   8.58 7.7     ~ 114 0
66 LF 4 +52 49 Em* 22 12 36.4576638384 +52 29 54.198140640 10.3 11.1 11.0     B1.5Ve 15 0
67 BD+51 3289 * 22 12 52.8264311472 +52 29 57.288792156 9.88 10.42 10.6     B2IV 14 0
68 Ass Cep OB 1 As* 22 29 +56.6           ~ 87 0
69 LS III +55 88 * 22 29 57.2423372736 +55 30 32.711230908   11.48 11.14     B0.2IV 9 0
70 LS III +59 29 * 22 42 28.7700084648 +59 40 18.787152900 11.53 11.6 11.0     B0.7III 12 0
71 NGC 7380 OpC 22 47 16 +58 07.5           ~ 190 0
72 LS III +58 70 * 22 59 13.7118810120 +58 44 42.971126208 11.24 11.66 11.32 11.316   B0V 26 0
73 LS III +57 111 * 22 59 23.4866008800 +57 43 30.080631000   10.96 10.31     B0.2III 9 0
74 LS III +58 71 * 22 59 28.3694908008 +58 47 51.161147160 12.03 12.55 12.12 12.08   B0.3V 8 0
75 LS III +57 112 * 22 59 48.9423283920 +57 45 35.145418284 11.11 11.2 10.6     B0.3III 13 0
76 Ass Cep OB 5 As* 23 02 16 +57 01.3           ~ 19 1
77 LS I +59 10 * 23 38 10.8292196448 +59 58 55.801139520 11.27 11.6 10.8     B0.2III 17 0
78 BD+62 2296 ** 23 47 20.401560 +63 13 12.33804 9.75     8.995   B2.5Iae+WN4 25 0
79 BD+62 2296A s*b 23 47 20.4033720432 +63 13 12.276725520   9.80 8.82     B2.5Iae 8 0
80 LS I +60 33 bC* 23 47 51.6805166904 +61 05 45.820933044 11.17 11.30 11.0     B0III 18 0
81 BD+59 2779 * 23 49 33.0545635488 +60 45 15.347417220 10.93 11.17 10.5     B0.2V 14 0
82 BD+60 2631 * 23 52 12.9878182392 +60 54 58.247545788 9.68 10.05 9.7     B0.5III 18 0
83 BD+60 2635 * 23 53 05.2165799040 +60 54 44.678044584 9.98 10.50 10.1     O6V((f)) 23 0
84 LS I +62 43 * 23 53 07.4268200184 +62 30 01.105774524 12.3 12.71 12.34     B2IV 9 0
85 LS I +62 44 * 23 53 21.2320442016 +62 28 17.284117980 12.74 13.01 12.53 12.52   B2.5IV 7 0
86 Ass Cas OB 5 As* 23 54 +61.6           ~ 74 0
87 BD+63 2084 * 23 59 13.9085690136 +63 49 10.355210724   9.43 9.2     B2III 17 0

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