2014MNRAS.437.1549B

Query : 2014MNRAS.437.1549B

2014MNRAS.437.1549B - Mon. Not. R. Astron. Soc., 437, 1549-1553 (2014/January-2)

The Milky Way spiral structure parameters from data on masers and selected open clusters.

BOBYLEV V.V. and BAJKOVA A.T.

Abstract (from CDS):

To estimate the parameters of the Galactic spiral structure - namely the pitch angle i and the number of spiral arms - data on Galactic masers with known trigonometric parallaxes were used. We applied the well-known method based on analysis of the `position angle - distance logarithm' diagram. Estimates of the pitch angle i obtained from four segments of different arms belonging to the global Galactic structure are self-consistent and close to i = -13°±1°. The segment which is most interesting is that of the Outer arm. It contains only three masers. Hence, in order to obtain correct estimates, we also used the data on 12 very young star clusters with distances determined by Camargo et al. from infrared photometry. The estimates obtained allow us to conclude in favour of the four-armed model of the Galactic spiral structure.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): Masers - Galaxy: structure

Simbad objects: 76

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Number of rows : 76
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [FSR2007] 0486 OpC 00 20 21.0 +59 19 05           ~ 13 0
2 IRAS 00420+5530 Y*? 00 44 57.31 +55 47 18.1           ~ 61 0
3 NGC 281 HII 00 52 25.1 +56 33 54           ~ 251 1
4 V* S Per s*r 02 22 51.7113133056 +58 35 11.422774248 13.22 10.55 7.90     M4.5-7Iae 388 0
5 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1064 2
6 RAFGL 5077 HII 02 43 28.62213 +62 57 08.7770           ~ 77 0
7 [SDA2014] West4 Y*O 03 25 38.83 +30 44 06.2           ~ 266 1
8 IRAS F03226+3033 Y*O 03 25 38.83 +30 44 06.2           ~ 371 0
9 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
10 CBB 10 Cl* 04 05 58.0 +51 06 07           ~ 3 0
11 HD 283447 Or* 04 14 12.9261150912 +28 12 12.359055168 13.17 12.07 10.68 9.45 8.67 K3Ve 445 0
12 HD 283572 Or* 04 21 58.8484815456 +28 18 06.512641416   9.80 9.03 9.14   G5IVe 308 0
13 V* T Tau TT* 04 21 59.4319873992 +19 32 06.432393336   11.22 10.12 9.80   K0IV/Ve 1456 1
14 CoKu HP Tau G2 Or* 04 35 54.1535049648 +22 54 13.426506072 13.63 12.31 11.158 10.14 9.172 G2e 138 0
15 CBB 11 Cl* 04 40 27.0 +50 28 03           ~ 3 0
16 NGC 1624 OpC 04 40 36.0 +50 27 42     11.8     ~ 79 1
17 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
18 CBB 12 Cl* 04 41 14.0 +50 28 00           ~ 3 0
19 [FSR2007] 0851 OpC 05 14 39.0 +19 48 01           ~ 11 0
20 IRAS 05137+3919 Cld 05 17 13.3 +39 22 14           ~ 75 0
21 IRAS 05168+3634 mul 05 20 16.2 +36 37 21           ~ 48 0
22 GAL 192.16-03.82 HII 05 58 13.4 +16 32 00           ~ 145 1
23 SH 2-252 A HII 06 08 33 +20 39.3           ~ 75 0
24 RAFGL 5180 SFR 06 08 54.1 +21 38 25           ~ 125 0
25 IRAS 06061+2151 SFR 06 09 07.8 +21 50 39           ~ 87 0
26 IC 2162 HII 06 13 04.1 +17 58 44           ~ 372 2
27 LBN 196.49-01.60 HII 06 14 38.29 +13 49 41.0           ~ 169 1
28 [FSR2007] 0909 OpC 06 15 46.0 +19 00 49           ~ 9 0
29 [FSR2007] 0831 Cl* 06 28 47.0 +33 39 16           ~ 6 0
30 [FSR2007] 1099 OpC 06 34 27.0 -03 49 37           ~ 8 0
31 CBB 14 Cl* 06 54 34.0 +00 14 58           ~ 3 0
32 CBB 15 Cl* 06 54 46.0 +00 23 38           ~ 3 0
33 [FSR2007] 0843 Cl* 07 00 37.0 +35 04 38           ~ 8 0
34 NAME Car Arm PoG 10 00 -60.0           ~ 471 1
35 G 44-46 PM* 10 53 31.7561987561 +12 56 02.676023329   15.8   13.9   dM4.0 24 0
36 NAME Crux-Scutum Spiral Arm reg 12 30 -60.0           ~ 323 0
37 NAME Car-Sgr Arm PoG 15 00 -40.0           ~ 581 1
38 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
39 Haro 1-6 Or* 16 26 03.0276684144 -24 23 36.188140848   14.15 14.01 12.38 10.80 K0 229 2
40 GSS 35 TT* 16 26 34.1761719864 -24 23 28.283473860     16.53 14.75 12.51 B3 254 1
41 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
42 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1357 1
43 BFS 65 HII 17 20 06.91 -38 57 34.1           ~ 81 1
44 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2443 1
45 RAFGL 2046 HII 18 00 32.1 -24 04 03           ~ 380 0
46 GAL 009.62+00.19 HII 18 06 13.9 -20 31 44           ~ 226 0
47 GAL 012.89+00.49 HII 18 11 51.3 -17 31 29           ~ 217 0
48 W 33 SFR 18 14 14.0 -17 55 50           ~ 292 0
49 GAL 014.33-00.64 HII 18 18 53.5 -16 47 39           ~ 75 0
50 [EC92] 95 Y*O 18 29 57.893 +01 12 46.25           K1.0 79 3
51 Caswell CH3OH 023.437-00.184 Mas 18 34 39.270 -08 31 39.00           ~ 5 0
52 MSX5C G023.0126-00.4177 MIR 18 34 42.2 -09 00 41           ~ 65 0
53 Caswell CH3OH 027.36-00.16 Mas 18 41 50.6 -05 01 47           ~ 14 0
54 MSXDC G034.43+00.24 MoC 18 53 18.9 +01 26 39           ~ 122 0
55 GAL 035.2-00.74 cor 18 58 13.00 +01 40 36.0           ~ 176 0
56 IRAS 18556+0136 mul 18 58 13.1 +01 40 35           ~ 142 0
57 SNR G035.2-01.8 SNR 19 01.6 +01 14           ~ 158 0
58 IRAS 19181+1349 HII 19 20 30.95 +13 55 26.7           ~ 54 0
59 2MASS J19233684+1728589 Y*O 19 23 36.8145280608 +17 28 58.953209844           ~ 52 0
60 W 51 SNR 19 23 50 +14 06.0           ~ 1352 1
61 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0
62 NAME Cyg Arm PoG 20 02 +40.0           ~ 163 0
63 IRAS 20143+3634 MIR 20 16 13.38264 +36 43 33.6936           ~ 13 0
64 2MASS J20161456+3735295 HII 20 16 14.566 +37 35 29.53           ~ 18 0
65 GAL 074.03-01.71 Mas 20 25 07.1053 +34 49 57.593           ~ 10 0
66 [HLB98] Onsala 148 Mas 21 02 22.8 +50 03 07           ~ 4 0
67 V* V645 Cyg Ae* 21 39 58.2745507632 +50 14 21.042184668   14.23 13.10 13.82   O6/9eq 279 0
68 NAME Outer Arm PoG 21 48 +69.4           ~ 370 0
69 LDN 1204G cor 22 19 19.1 +63 18 51           ~ 10 0
70 LDN 1204A HII 22 21 26.68 +63 51 38.2           ~ 120 0
71 IRC +60370 s*r 22 49 58.9665300864 +60 17 56.653704636       9.06   K2Ia 50 0
72 NAME Cep A HW 9 Rad 22 56 18.64 +62 01 48.0           ~ 19 0
73 NGC 7538 OpC 23 13 37 +61 30.0           ~ 920 1
74 V* PZ Cas s*r 23 44 03.2814215136 +61 47 22.190200476 12.80 11.48 8.90 6.08 3.90 M3Ia 210 0
75 NAME Ori Arm PoG ~ ~           ~ 218 0
76 NAME Local Arm reg ~ ~           ~ 649 0

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