2014ApJ...783..130R


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.29CET21:48:06

2014ApJ...783..130R - Astrophys. J., 783, 130 (2014/March-2)

Trigonometric parallaxes of high mass star forming regions: the structure and kinematics of the Milky Way.

REID M.J., MENTEN K.M., BRUNTHALER A., ZHENG X.W., DAME T.M., XU Y., WU Y., ZHANG B., SANNA A., SATO M., HACHISUKA K., CHOI Y.K., IMMER K., MOSCADELLI L., RYGL K.L.J. and BARTKIEWICZ A.

Abstract (from CDS):

Over 100 trigonometric parallaxes and proper motions for masers associated with young, high-mass stars have been measured with the Bar and Spiral Structure Legacy Survey, a Very Long Baseline Array key science project, the European VLBI Network, and the Japanese VLBI Exploration of Radio Astrometry project. These measurements provide strong evidence for the existence of spiral arms in the Milky Way, accurately locating many arm segments and yielding spiral pitch angles ranging from about 7° to 20°. The widths of spiral arms increase with distance from the Galactic center. Fitting axially symmetric models of the Milky Way with the three-dimensional position and velocity information and conservative priors for the solar and average source peculiar motions, we estimate the distance to the Galactic center, R0, to be 8.34±0.16 kpc, a circular rotation speed at the Sun, Θ0, to be 240±8 km/s, and a rotation curve that is nearly flat (i.e., a slope of -0.2±0.4 km/s/kpc) between Galactocentric radii of ~5 and 16 kpc. Assuming a "universal" spiral galaxy form for the rotation curve, we estimate the thin disk scale length to be 2.44±0.16 kpc. With this large data set, the parameters R0 and Θ0are no longer highly correlated and are relatively insensitive to different forms of the rotation curve. If one adopts a theoretically motivated prior that high-mass star forming regions are in nearly circular Galactic orbits, we estimate a global solar motion component in the direction of Galactic rotation, V= 14.6±5.0 km/s. While Θ0and Vare significantly correlated, the sum of these parameters is well constrained, Θ0+ V= 255.2±5.1 km/s, as is the angular speed of the Sun in its orbit about the Galactic center, (Θ0+ V)/R0= 30.57±0.43 km/s/kpc. These parameters improve the accuracy of estimates of the accelerations of the Sun and the Hulse-Taylor binary pulsar in their Galactic orbits, significantly reducing the uncertainty in tests of gravitational radiation predicted by general relativity.

Abstract Copyright:

Journal keyword(s): Galaxy: fundamental parameters - Galaxy: kinematics and dynamics - Galaxy: structure - gravitational waves - parallaxes - stars: formation

VizieR on-line data: <Available at CDS (J/ApJ/783/130): table1.dat refs.dat>

Nomenclature: Table 1: [RMB2014] GLLL.ll+BB.bb N=103.

Status at CDS : All or part of tables of objects could be ingested in SIMBAD; there are some issues with cross-identifications or classifications.

Simbad objects: 49

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Number of rows : 49

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 LDN 1287 DNe 00 36 47.5 +63 29 02           ~ 83 0
2 IRAS 00420+5530 Y*? 00 44 57.31 +55 47 18.1           ~ 56 0
3 NGC 281 HII 00 52 25.1 +56 33 54           ~ 229 1
4 V* S Per s*r 02 22 51.7103845023 +58 35 11.454759954 13.22 10.55 7.90     M4.5-7Iae 356 0
5 RAFGL 5077 HII 02 43 28.62213 +62 57 08.7770           ~ 63 0
6 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5766 1
7 NAME Per Arm PoG 03 30 +45.0           ~ 1278 0
8 IRAS 05137+3919 Cld 05 17 13.3 +39 22 14           ~ 56 0
9 M 42 HII 05 35 17.3 -05 23 28           ~ 3752 0
10 IRAS 06061+2151 SFR 06 09 07.8 +21 50 39           ~ 81 0
11 NGC 2175 OpC 06 09 39 +20 29.2   7.0 6.8     ~ 248 3
12 IC 2162 HII 06 13 04.1 +17 58 44           ~ 339 2
13 LBN 196.49-01.60 HII 06 14 38.40 +13 49 44.7           ~ 162 1
14 V* VY CMa s*r 07 22 58.32877 -25 46 03.2355 12.01 10.19 7.95     M5Iae 1006 0
15 OHIO N 001 Rad 12 03 08.09 +07 15 30.1           ~ 17 1
16 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1038 0
17 NAME Nor Arm PoG 16 00 -50.0           ~ 345 0
18 NGC 6334 HII 17 20 51 -36 06.9           ~ 591 0
19 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 3517 3
20 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11765 0
21 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1944 1
22 W 31 SFR 18 10 28.6 -19 55 51           ~ 241 0
23 GRS G012.89 +00.49 HII 18 11 51.3 -17 31 29           ~ 148 0
24 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1491 0
25 W 43s Rad 18 47 41.68 -02 00 24.3           ~ 22 0
26 NAME Sgr Arm PoG 19 00 -30.0           ~ 530 1
27 W 49n HII 19 10 13.2 +09 06 12           ~ 418 3
28 Caswell OH 043.80-00.13 Mas 19 11 54.3 +09 35 55           ~ 61 0
29 2MASS J19233684+1728589 Y*O 19 23 36.8147735002 +17 28 58.930908203           ~ 46 0
30 [WBN74] W 51 IRS 2 SFR 19 23 40.05 +14 31 07.1           ~ 255 0
31 W 51m Rad 19 23.7 +14 30           ~ 49 0
32 IRAS 20126+4104 Y*O 20 14 25.8816186803 +41 13 36.869078243           B2.5-B0.5 399 0
33 NAME Cygnus 2N HII 20 21 44.1 +37 26 40           ~ 110 1
34 RAFGL 2591 Y*O 20 29 25.03656 +40 11 20.3316           ~ 571 0
35 IRAS 20290+4052 HII 20 30 50.660 +41 02 27.60           ~ 24 0
36 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 360 1
37 NML Cyg s*r 20 46 25.5382179476 +40 06 59.396202678   18.64 16.60     M7/8 484 0
38 V* V645 Cyg Ae* 21 39 58.2775729406 +50 14 21.002745087   14.23 13.10 13.82   O6/9eq 255 0
39 NAME Outer Arm PoG 21 48 +69.4           ~ 226 0
40 LDN 1204A DNe 22 21 22.5 +63 51 13           ~ 90 0
41 LDN 1206 DNe 22 28 52.2 +64 13 43           ~ 62 0
42 NAME Cepheus A SFR 22 56 17.9 +62 01 49           ~ 699 2
43 NGC 7538 OpC 23 13 37 +61 30.0           ~ 831 0
44 NAME Scutum Spiral Arm PoG ~ ~           ~ 280 0
45 NAME Local Arm reg ~ ~           ~ 383 0
46 NAME GD-1 Stream St* ~ ~           ~ 168 0
47 NAME Local Group GrG ~ ~           ~ 7076 0
48 NAME Centaurus Arm PoG ~ ~           ~ 73 0
49 NAME Galactic Bar reg ~ ~           ~ 919 0

    Equat.    Gal    SGal    Ecl

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2020.10.29-21:48:06

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