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

Full paper

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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	Sp type	#ref 1850 - 2023	#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	86	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					~	43	0
9	BD+61 90a	SB*	00 28 37.7096445336	+62 29 17.695485960	9.67	10.39	10.20		B0.5V	10	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					~	465	0
13	Ass Per OB 1	As*	02 21	+57.6					~	170	1
14	IC 1805	OpC	02 32 50.4	+61 28 16		7.03	6.5		~	511	2
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					~	122	0
17	Ass Cam OB 1	As*	03 31.6	+58 38					~	93	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	29	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)	49	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	43	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					~	69	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		~	72	1
31	LBN 159.33+02.55	HII	04 56 05.5	+47 22 33					~	69	0
32	LBN 159.17+03.33	HII	04 58 45.70	+47 59 36.0					~	80	2
33	Ass Aur OB 1	As*	05 22	+33.9					~	83	0
34	NGC 1893	OpC	05 22 53.8	+33 26 38					~	257	0
35	Cl Stock 8	OpC	05 27 49.4	+34 27 07					~	78	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					~	45	0
38	NGC 1931	OpC	05 31 23	+34 14.0			10.1		~	125	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)	41	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	*	06 16 13.3274391960	+22 45 48.779291448	11.69	11.775	10.726	10.450	B0.2III:	25	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	13	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					~	159	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		~	112	0
66	LF 4 +52 49	Em*	22 12 36.4576638384	+52 29 54.198140640	10.3	11.1	11.0		B1.5Ve	14	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					~	85	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					~	188	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	16	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))	21	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					~	70	0
87	BD+63 2084	*	23 59 13.9085690136	+63 49 10.355210724		9.43	9.2		B2III	17	0

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