2014A&A...566A..17W

Query : 2014A&A...566A..17W

2014A&A...566A..17W - Astronomy and Astrophysics, volume 566A, 17-17 (2014/6-1)

Trigonometric parallaxes of star-forming regions in the Sagittarius spiral arm.

WU Y.W., SATO M., REID M.J., MOSCADELLI L., ZHANG B., XU Y., BRUNTHALER A., MENTEN K.M., DAME T.M. and ZHENG X.W.

Abstract (from CDS):

We report measurements of parallaxes and proper motions of ten high-mass star-forming regions in the Sagittarius spiral arm of the Milky Way as part of the BeSSeL Survey with the VLBA. Combining these results with eight others from the literature, we investigated the structure and kinematics of the arm between Galactocentric azimuths β≃-2° and 65°. We found that the spiral pitch angle is 7.3±1.5°; the arm's half-width, defined as the rms deviation from the fitted spiral, is ≃0.2kpc; and the nearest portion of the Sagittarius arm is 1.4±0.2kpc from the Sun. Unlike for adjacent spiral arms, we found no evidence for significant peculiar motions of sources in the Sagittarius arm opposite to Galactic rotation.

Abstract Copyright: ∼

Journal keyword(s): astrometry - Galaxy: structure - Galaxy: kinematics and dynamics - masers - stars: formation

Simbad objects: 64

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Number of rows : 64
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 Per Arm PoG 03 30 +45.0           ~ 1513 0
2 NAME Car Arm PoG 10 00 -60.0           ~ 439 1
3 NVSS J171205-351434 Rad 17 12 05.1353 -35 14 34.183           ~ 3 0
4 NGC 6334 HII 17 20 53 -36 07.9           ~ 682 0
5 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 342 0
6 MMB G351.445+00.660 cor 17 20 54.61 -35 45 08.6           ~ 48 0
7 PMN J1733-3722 Rad 17 33 15.1930935 -37 22 32.398009           ~ 51 1
8 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14393 0
9 [IBR2011] J1808-1822 Rad 18 08 55.51552 -18 22 53.3897           ~ 7 0
10 PMN J1809-1519 Rad 18 09 10.20936 -15 20 09.6991           ~ 10 1
11 PMN J1810-1626 Rad 18 10 39.85118 -16 26 52.9225           ~ 8 1
12 IRAS 18134-1942 HII 18 16 22.1327 -19 41 27.219           ~ 59 0
13 GAL 014.33-00.64 HII 18 18 53.5 -16 47 39           ~ 64 0
14 HEC G014.63-00.57 DNe 18 19 13.6 -16 29 56           ~ 10 0
15 GAL 015.03-00.67 Mas 18 20 22.3 -16 11 18           ~ 12 0
16 NAME M 17 SW SFR 18 20 23.1 -16 11 43           ~ 269 0
17 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1612 0
18 PMN J1821-2110 Rad 18 21 05.46937 -21 10 45.2453           ~ 7 0
19 PMN J1825-1718 Rad 18 25 36.532306 -17 18 49.84801           ~ 36 1
20 QSO J1832-2039 BLL 18 32 11.0455806144 -20 39 48.210054948   18.56 20.2     ~ 70 1
21 GAL 034.4+00.23 HII 18 53 17.4 +01 24 55           ~ 82 1
22 RAFGL 2271 SFR 18 53 18.54 +01 14 57.9           ~ 504 0
23 MSXDC G034.43+0.24 MoC 18 53 18.9 +01 26 39           ~ 101 0
24 [WWS2012] G035.03+00.35 cor 18 54 00.7975 +02 01 24.083           ~ 22 0
25 MSX5C G037.4232+01.5180 NIR 18 54 13.3970598000 +04 41 21.078806604           ~ 2 0
26 IRAS 18517+0437 SFR 18 54 13.8 +04 41 32           ~ 73 0
27 NVSS J185535+025119 Rad 18 55 35.43648898 +02 51 19.5650288           ~ 18 1
28 NVSS J185631+061017 Rad 18 56 31.83884653 +06 10 16.7658351           ~ 21 1
29 NVSS J185751-004817 Rad 18 57 51.35860 -00 48 21.9496           ~ 12 1
30 GAL 035.2-00.74 cor 18 58 13.00 +01 40 36.0           ~ 169 0
31 IRAS 18556+0136 mul 18 58 13.1 +01 40 35           ~ 139 0
32 NAME Sgr Arm PoG 19 00 -30.0           ~ 637 1
33 SNR G035.2-01.8 SNR 19 01.6 +01 14           ~ 153 0
34 GAL 035.20-01.74 Y*O 19 01 46.49 +01 13 24.7           ~ 74 1
35 GAL 035.19-01.75 HII 19 01 47.4 +01 13 00           ~ 24 0
36 NVSS J190353+014526 Rad 19 03 53.06321019 +01 45 26.3087456           ~ 10 1
37 [IBR2011] J1904+0110 Rad 19 04 26.39738 +01 10 36.7078           ~ 5 0
38 NVSS J190539+095208 Rad 19 05 39.89897022 +09 52 08.4074677           ~ 20 1
39 [IBR2011] J1907+0907 Rad 19 07 41.96336 +09 07 12.3968           ~ 3 0
40 [IBR2011] J1908+1201 Rad 19 08 40.32064 +12 01 58.8609           ~ 3 0
41 W 49 SFR 19 10 20 +09 07.7           ~ 574 1
42 OH 043.796-00.127 Mas 19 11 53.9868 +09 35 50.325           ~ 80 0
43 [IBR2011] J1913+1307 Rad 19 13 14.00638 +13 07 47.3307           ~ 4 0
44 [IBR2011] J1913+1220 Rad 19 13 16.24 +12 20 39.2           ~ 2 0
45 IRAS 19110+1045 Y*O 19 13 22.0427 +10 50 53.336           ~ 126 0
46 NVSS J191324+093246 Rad 19 13 24.0254 +09 32 45.379           ~ 8 1
47 Caswell H2O 045.46+00.05 Mas 19 14 23.9 +11 09 38           ~ 5 0
48 GAL 043.89-00.78 HII 19 14 26.16 +09 22 34.0           ~ 51 0
49 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2627 0
50 NVSS J191718+140509 Rad 19 17 18.06412 +14 05 09.7675           ~ 7 1
51 NVSS J192218+084157 Rad 19 22 18.63366368 +08 41 57.3758311           ~ 20 1
52 AGAL G049.214-00.342 Y*O 19 23 01.2831 +14 17 06.445           ~ 17 0
53 GAL 049.2-00.3 HII 19 23 03 +14 16.2           ~ 26 0
54 2MASS J19233684+1728589 Y*O 19 23 36.8145280608 +17 28 58.953209844           ~ 50 0
55 [WBN74] W 51 IRS 2 PCG 19 23 39.93 +14 31 09.4           ~ 292 0
56 NAME W 51 Main reg 19 23 43.8 +14 30 37           ~ 143 0
57 W 51 SNR 19 23 50 +14 06.0           ~ 1276 1
58 ICRF J192439.4+154043 Bz? 19 24 39.45588 +15 40 43.9420           ~ 44 1
59 NVSS J192540+122738 Rad 19 25 40.81705290 +12 27 38.0868063           ~ 22 1
60 4C 15.66 Rad 19 30 52.76698092 +15 32 34.4273751           ~ 19 1
61 NAME Outer Arm PoG 21 48 +69.4           ~ 316 0
62 NAME Local Arm reg ~ ~           ~ 537 0
63 NAME Galactic Bar reg ~ ~           ~ 1216 0
64 NAME Scutum Spiral Arm PoG ~ ~           ~ 351 0

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