2011A&A...532A.127D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST02:53:32

2011A&A...532A.127D - Astronomy and Astrophysics, volume 532A, 127-127 (2011/8-1)

A H2CO and H110α survey of H II regions with the 25-m radio telescope of Nanshan station.

DU Z.M., ZHOU J.J., ESIMBEK J., HAN X.H. and ZHANG C.P.

Abstract (from CDS):

Accurate distances are necessary for determining the physical properties of massive star-formation regions and the structure of our Galaxy. One way to approach these studies is by determining the kinematic distances of HII regions. This study determines the kinematic distances of HII regions located in the inner Galaxy and studies their spatial distribution. We observed 251 HII regions with the 25-m radio telescope of Nanshan Station, looking for H2CO absorption lines and H110α radio recombination lines (RRLs). The kinematic distances were calculated using the velocity of H110α lines and a model of the Galactic rotation. The kinematic distance ambiguity was resolved using the H2CO velocities. We detected the H110α RRLs in 28 sources and H2CO absorption lines in 59 sources. In the latter case, 43 features had not previously been observed. H2CO and H110α lines were simultaneously detected toward 23 HII regions. We resolved the kinematic distance ambiguities for 14 HII regions and 20 intervening molecular clouds. Our statistical analysis shows that UCHII regions are tightly confined to the Galactic plane, and their vertical height distribution is about 25.4pc. The corresponding value of the HII regions is 28.6pc. There is a good statistical relationship between the fluxes of H2CO and infrared 100µm, for those HII regions with both H2CO absorption lines and H110α RRLs detected. This suggests that there is a weak correlation between the continuum fluxes at 6cm and infrared 100µm.

Abstract Copyright:

Journal keyword(s): Galaxy: structure - HII regions - ISM: molecules - radio lines: ISM

VizieR on-line data: <Available at CDS (J/A+A/532/A127): table1.dat table2.dat table3.dat table4.dat>

CDS comments: In table 4, IRAS18507+0101 is a misprint for IRAS18507+0110.

Simbad objects: 80

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Number of rows : 80

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 IRAS 01202+6133 Y*O 01 23 32.17896 +61 48 49.5180           ~ 31 0
2 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2497 2
3 IRAS 03271+3013 cor 03 30 15.159 +30 23 49.38           ~ 60 0
4 NAME LDN 1641 S3 HII 05 39 56.1 -07 30 26           ~ 61 0
5 SH 2-235 HII 05 41.1 +35 50           ~ 185 0
6 IRAS 05379+3550 HII 05 41 20.5 +35 52 07           ~ 7 0
7 2MASS J05473667+0020060 Y*O 05 47 36.671 +00 20 06.04           ~ 24 0
8 IRAS 05454+0034 IR 05 47 59.2 +00 35 31           ~ 5 0
9 NAME Mon R2 HII 06 07 46.6 -06 22 59           ~ 650 2
10 IRAS 06055+2039 ISM 06 08 32.1 +20 39 18           ~ 54 0
11 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5336 6
12 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825108   17.51 17.25     ~ 3716 1
13 GAL 359.977+00.168 Y*O 17 44 53.4 -28 52 20           ~ 23 0
14 IRAS 17418-2927 IR 17 44 59.5 -29 28 54           ~ 6 0
15 IRAS 17420-2902 IR 17 45 14.8 -29 03 18           ~ 10 0
16 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11540 0
17 IRAS 17430-2900 IR 17 46 16.1 -29 01 37           ~ 8 0
18 GAL 000.38+00.04 HII 17 46 21.5 -28 35 45           ~ 23 0
19 IRAS 17432-2855 HII 17 46 26.7 -28 56 11           ~ 11 0
20 IRAS 17441-2822 HII 17 47 20.224 -28 23 04.13           ~ 23 0
21 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1909 1
22 IRAS 17449-2855 HII 17 48 10.5 -28 56 56           ~ 6 0
23 [CKW87] 174531.7-280044 HII 17 48 40.9 -28 01 40           ~ 8 0
24 IRAS 17455-2805 IR 17 48 41.0006 -28 06 57.800           ~ 8 0
25 IRAS 18035-2126 Y*O 18 06 35.9 -21 26 01           ~ 12 0
26 IRAS 18048-2131 HII 18 07 51.7 -21 30 53           ~ 4 0
27 GAL 010.30-00.15 HII 18 08 58.315 -20 05 15.27           ~ 79 0
28 IRAS 18064-2008 HII 18 09 24.3 -20 08 07           ~ 8 0
29 W 31a Rad 18 10 28.3 -19 55 59           ~ 16 0
30 W 31 SFR 18 10 28.6 -19 55 51           ~ 241 0
31 SNR G012.8-00.2 SFR 18 14 14.0 -17 55 50           ~ 218 0
32 IRAS 18114-1718 IR 18 14 23.3 -17 17 34           ~ 10 0
33 IRAS 18127-1717 IR 18 15 38.1 -17 16 29           ~ 9 0
34 RCW 157 HII 18 16.1 -16 35           ~ 4 0
35 [KC97c] G014.6+00.1 HII 18 16 48.3 -16 11 29           ~ 6 0
36 IRAS 18141-1615 HII 18 17 02.1 -16 14 39           ~ 16 0
37 NAME M 17S HII 18 20 25.1 -16 11 37           ~ 23 1
38 RCW 160 HII 18 20 30 -16 11.2           ~ 5 0
39 [L89b] 15.181-00.625 HII 18 20 30.6 -16 02 22           ~ 6 0
40 NAME M 17 North MoC 18 20 40.19 -16 09 29.0           ~ 41 0
41 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1484 0
42 IRAS 18222-1317 HII 18 25 02.3 -13 15 51           ~ 16 0
43 GAL 019.61-00.23 HII 18 27 38.0 -11 56 42           ~ 139 0
44 IRAS 18258-0737 HII 18 28 34.1 -07 35 31           ~ 16 0
45 IRAS 18265-1517 out 18 29 24.8 -15 15 49           ~ 60 0
46 [LT2008] 3 HII 18 34 43.9 -08 33 19           ~ 16 0
47 IRAS 18328-0735 IR 18 35 31.2 -07 33 22           ~ 6 0
48 RAFGL 2238 HII 18 43 17.5 -03 35 45           ~ 11 0
49 IRAS 18408-0348 HII 18 43 31.1 -03 44 57           ~ 16 0
50 CORNISH G030.8662+00.1143 HII 18 47 15.7 -01 47 10           ~ 22 1
51 SNR G030.8-00.0 SNR 18 47 32 -01 56.5           ~ 437 0
52 GAL 030.78-00.03 HII 18 47 36.4 -01 55 55           ~ 11 0
53 IRAS 18454-0158 HII 18 48 01.3 -01 54 49           ~ 15 0
54 IRAS 18461-0136 HII 18 48 44.6 -01 33 16           ~ 10 0
55 IRAS 18507+0101 * 18 53 17.04384 +01 04 54.9192           ~ 2 0
56 OH 34.26 +0.15 SFR 18 53 18.54 +01 14 57.9           ~ 460 0
57 NRAO 584 Rad 18 53 20 +01 14.9           ~ 14 0
58 IRAS 18530+0215 cor 18 55 33.7 +02 19 09           ~ 36 0
59 IRAS 18536+0753 mul 18 56 03.7 +07 57 26           ~ 17 0
60 [KC97c] G040.5+02.5 HII 18 56 12.7 +07 53 39           ~ 5 0
61 LBN 040.46+02.46 HII 18 56.4 +07 48   12.16 11.66     ~ 22 0
62 IRAS 18566+0408 cor 18 59 10.3479 +04 12 18.220           ~ 119 1
63 GAL 035.20-01.74 Y*O 19 01 47.0 +01 13 08           ~ 71 1
64 Caswell OH 045.12+00.13 HII 19 13 27.845 +10 53 36.74           ~ 111 0
65 GAL 045.5+00.0 HII 19 14 20.8 +11 09 04           ~ 138 0
66 [GPD88] 045.454+0.060 HII 19 14 21.3 +11 09 13           ~ 150 1
67 IRAS 19124+1106 IR 19 14 45 +11 12.1           ~ 22 0
68 [KB94] 54 HII 19 17 26.4 +11 55 54           ~ 12 0
69 GAL 048.61+00.02 HII 19 20 31.3 +13 55 24           ~ 51 0
70 [KJB2003] G48.929-0.281 HII 19 22 16.3 +14 03 50           ~ 14 0
71 [KJB2003] G49.370-0.302 HII 19 23 12.7 +14 26 46           ~ 8 0
72 W 51 SNR 19 23 50 +14 06.0           ~ 1143 1
73 W 58a HII 20 01 45.8 +33 32 43           ~ 278 4
74 GAL 079.30+01.30 HII 20 28 09.5 +40 51 43           ~ 9 0
75 IRAS 20332+4124 HII 20 35 00.5 +41 34 48           ~ 35 0
76 [KC97c] G081.3+01.1 HII 20 35 06.2 +42 20 24           ~ 7 0
77 NGC 7027 PN 21 07 01.8 +42 14 10   9.1 10.9     ~ 2323 1
78 IRAS 23033+5951 Y*O 23 05 25.16112 +60 08 15.4428           ~ 78 0
79 NGC 7538 OpC 23 13 37 +61 30.0           ~ 827 0
80 IRAS 23116+6111 mul 23 13 45.6 +61 28 18           ~ 45 0

    Equat.    Gal    SGal    Ecl

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2020.07.10-02:53:32

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