2003ApJ...587..714W

Query : 2003ApJ...587..714W

2003ApJ...587..714W - Astrophys. J., 587, 714-726 (2003/April-3)

Resolution of distance ambiguities of inner galaxy massive star formation regions. I.

WATSON C., ARAYA E., SEWILO M., CHURCHWELL E., HOFNER P. and KURTZ S.

Abstract (from CDS):

Fifty-four ultracompact (UC) H II regions in the GLIMPSE survey region (|b|<1° and 30°<l<70°) were observed in H2CO and H110α using the 305 m Arecibo telescope. By analyzing H2CO absorption against the UC H II region continuum emission, we resolve the distance ambiguity toward 44 sources. This determination is critical to measure global physical properties of UC H II regions (e.g., luminosity, size, mass) and properties of the Galaxy (e.g., spiral structure, abundance gradients). We find that the distribution of UC H II regions in this survey is consistent with a ``local spur'', the Perseus, Sagittarius, and Scutum arms as delineated by Taylor & Cordes. However, departures from model velocities produce distance uncertainties only slightly smaller than the proposed arm separations.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Disk - Radio Lines: General - Stars: Formation

VizieR on-line data: <Available at CDS (J/ApJ/587/714): table1.dat table2.dat table3.dat table4.dat>

Nomenclature: Table 3: [WAS2003] GLL.ll+B.bb MCN N=136.

Simbad objects: 62

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Number of rows : 62
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 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
2 IRAS 18469-0041 HII 18 49 34.1 -00 38 00           ~ 7 0
3 BGPSv2 G032.119+00.092 cor 18 49 37.81 -00 41 01.1           ~ 33 0
4 IRAS 18488+0000 IR 18 51 24.8 +00 04 19           ~ 32 0
5 IRAS 18494+0113 HII 18 51 56.8 +01 17 00           ~ 11 0
6 IRAS 18494+0010 HII 18 51 57.5 +00 14 11           ~ 13 0
7 IRAS 18494+0110 bub 18 51 59.8 +01 13 47           ~ 15 1
8 IRAS 18495+0014 Y*O 18 52 09.34104 +00 18 30.9636           ~ 19 0
9 GAL 034.4+00.23 HII 18 53 17.4 +01 24 55           ~ 93 1
10 IRAS 18511+0038 HII 18 53 42.2 +00 41 47           ~ 14 1
11 GAL 035.03+00.35 cor 18 54 00.60 +02 01 19.3           ~ 48 0
12 IRAS 18530+0215 cor 18 55 33.7 +02 19 09           ~ 43 0
13 IRAS 18538+0216 HII 18 56 22.52 +02 20 27.0           ~ 35 0
14 IRAS 18540+0220 HII 18 56 35.6 +02 24 54           ~ 16 0
15 IRAS 18545+0134 Y*O 18 57 06.6 +01 38 51           ~ 17 0
16 IRAS 18551+0302 bub 18 57 42.1 +03 06 04           ~ 21 1
17 NAME Sgr Arm PoG 19 00 -30.0           ~ 710 1
18 GAL 037.55-00.11 HII 19 00 16.02 +04 03 15.1           ~ 41 0
19 IRAS 18578+0345 HII 19 00 23.5 +03 50 12           ~ 9 0
20 IRAS 18581+0409A HII 19 00 36.3 +04 14 15           ~ 8 0
21 IRAS 18582+0331 HII 19 00 45.2 +03 36 00           ~ 6 0
22 IRAS 18585+0407 HII 19 00 59.3 +04 12 06           ~ 12 0
23 IRAS 19002+0654 Y*O 19 02 39.5357424288 +06 59 07.788621768           ~ 23 0
24 IRAS 19008+0530 HII 19 03 13.9 +05 35 24           ~ 11 0
25 AGAL G039.388-00.141 cor 19 03 45 +05 40.7           ~ 58 1
26 IRAS 19035+0641 Y*O 19 06 01.6288 +06 46 36.140           ~ 84 0
27 IRAS 19074+0814 mul 19 09 50.1 +08 19 40           ~ 25 0
28 [L89b] 42.431-00.264 cor 19 09 50.18 +08 19 27.7           ~ 51 1
29 IRAS 19074+0752 cor 19 09 53.55 +07 57 14.8           ~ 46 0
30 IRAS 19078+0901 HII 19 10 15.6 +09 06 05           ~ 44 0
31 GAL 043.23-00.05 HII 19 10 33.52 +09 08 25.1           ~ 25 0
32 GAL 043.26-00.21 HII 19 11 11.7 +09 05 06           ~ 10 0
33 IRAS 19095+0930 cor 19 11 54.09216 +09 35 49.6896           ~ 115 0
34 GAL 043.18-00.52 HII 19 12 23.19 +08 32 12.2           ~ 43 0
35 RAFGL 2345 Cld 19 14 08.6 +11 12 27           ~ 64 0
36 OH 045.5+00.1 OH* 19 14 19.61808 +11 10 35.3280           O-rich 65 0
37 IRAS 19139+1113 Y*O 19 16 18.4 +11 19 10           ~ 15 0
38 IRAS 19145+1116 HII 19 16 55.6 +11 21 45           ~ 10 0
39 IRAS 19175+1357 cor 19 19 49.22 +14 02 46.8           ~ 30 0
40 IRAS 19191+1538 HII 19 21 27.2 +15 44 15           ~ 15 0
41 GAL 049.20-00.35 Cl* 19 23 02.1 +14 16 40           ~ 66 0
42 AGAL G051.678+00.719 cor 19 23 59 +16 57.7           ~ 48 0
43 AGAL G049.669-00.457 Y*O 19 24 20 +14 38.0           ~ 42 0
44 IRAS 19227+1721 HII 19 25 00.0 +17 27 34           ~ 10 0
45 2MASX J19251779+1512247 HII 19 25 17.790 +15 12 24.77           ~ 11 1
46 AGAL G053.037+00.112 cor 19 28 55.5 +17 52 00           ~ 50 0
47 IRAS 19282+1814 HII 19 30 28.1 +18 20 53           ~ 38 0
48 IRAS 19294+1836 Y*O 19 31 42.8 +18 42 33           ~ 16 0
49 BLAST J193849+230839 HII 19 38 47.19 +23 08 28.1           ~ 19 1
50 MSX6C G059.6032+00.9116 HII 19 39 34.8 +23 59 51           ~ 22 0
51 4C 21.53W HII 19 39 40.0 +21 37 28           ~ 21 0
52 NGC 6820 GNe 19 42 27.930 +23 05 14.75       14.56   ~ 50 0
53 MSX6C G059.7831+00.0648 Y*O 19 43 11.2464 +23 44 03.270           ~ 159 0
54 IRAS 19410+2336 SFR 19 43 11.5 +23 44 06           ~ 160 0
55 IRAS 19411+2306 cor 19 43 17.9613824400 +23 14 01.619818008           ~ 49 0
56 MSX6C G059.7654-00.0269 HII 19 43 29.8 +23 40 25           ~ 27 0
57 [BNM96] 063.125+0.443 HII 19 49 09.3798758496 +26 49 08.186732688           ~ 23 0
58 BWE 1949+2613 HII 19 52 00.2 +26 21 12           ~ 13 1
59 [KCW94] 069.540-00.975 HII 20 10 08.95 +31 31 35.4           ~ 168 1
60 IRAS 20081+3122 Y*O 20 10 09.036 +31 31 34.14           ~ 172 0
61 Onsala 1 cor 20 10 09.2036 +31 31 36.090           ~ 194 0
62 NAME Scutum Spiral Arm PoG ~ ~           ~ 393 0

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