2000A&A...361.1079Z

Query : 2000A&A...361.1079Z

2000A&A...361.1079Z - Astronomy and Astrophysics, volume 361, 1079-1094 (2000/9-3)

HNCO in massive galactic dense cores.

ZINCHENKO I., HENKEL C. and MAO R.Q.

Abstract (from CDS):

We surveyed 81 dense molecular cores associated with regions of massive star formation and Sgr A in the JK-1K1=505-404 and 10010-909 lines of HNCO. Line emission was detected towards 57 objects. Selected subsamples were also observed in the 101-000, 404-303, 707-606, 15015-14014, 16016-15015 and 21021-20020 lines, covering a frequency range from 22 to 461GHz. HNCO lines from the K–1 = 2,3 ladders were detected in several sources. Towards Orion-KL, K–1 = 5 transitions with upper state energies Eu/k∼1100 and 1300K could be observed. Five HNCO cores were mapped. The sources remain spatially unresolved at 220 and 461GHz (10010-909 and 21010-20020 transitions) with beam sizes of 24" and 18", respectively. The detection of hyperfine structure in the 101-000 transition is consistent with optically thin emission under conditions of Local Thermodynamic Equilibrium (LTE). This is corroborated by a rotational diagram analysis of Orion-KL that indicates optically thin line emission also for transitions between higher excited states. At the same time a tentative detection of interstellar HN13CO (the 100,10-90,9 line at 220GHz toward G 310.12-0.20) suggests optically thick emission from some rotational transitions. Typical HNCO abundances relative to H2 as derived from a population diagram analysis are ∼10–9. The rotational temperatures reach ∼500 K. The gas densities in regions of HNCO K–1=0 emission should be n>106cm–3 and in regions of K–1>0 emission about an order of magnitude higher even for radiative excitation. HNCO abundances are found to be enhanced in high-velocity gas. HNCO integrated line intensities correlate well with those of thermal SiO emission. This indicates a spatial coexistence of the two species and may hint at a common production mechanism, presumably based on shock chemistry.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - ISM: clouds - ISM: molecules - radio lines: ISM

VizieR on-line data: <Available at CDS (J/A+A/361/1079): tables 1, 2, 5 to 14>

Errata: Erratum vol. 363, p. 1195 (2000)

CDS comments: Tables 1, 2: col(1): masers in SIMBAD, [ZMT95] or [ZPT98] or [HLB98] or [PCC93], col(Remarks): source containing the maser. In abstract : G 310.12-0.20 misprint for 301.12 (in SIMBAD : [BE83] Maser 301.12-00.20)

Simbad objects: 132

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Number of rows : 132
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 V* V710 Cas Or* 00 36 45.9936324072 +63 28 52.969968696           ~ 91 0
2 [HLB98] Onsala 2 Mas 00 36 47.3530 +63 29 02.160           ~ 9 0
3 NGC 281 HII 00 52 25.1 +56 33 54           ~ 242 1
4 [HLB98] Onsala 5 Mas 00 52 25.1 +56 33 55           ~ 3 0
5 [HLB98] Onsala 8 Mas 02 25 28.2 +62 06 58           ~ 5 0
6 GAL 133.69+01.22 HII 02 25 28.23 +62 06 57.7           ~ 6 0
7 NAME W 3 OH HII 02 27 04.1 +61 52 22           ~ 1026 2
8 [HLB98] Onsala 13 Mas 02 27 04.7 +61 52 26           ~ 4 0
9 [HLB98] Onsala 36 Mas 05 20 16.1 +36 37 21           ~ 2 0
10 IRAS 05168+3634 mul 05 20 16.2 +36 37 21           ~ 46 0
11 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2293 1
12 [HLB98] SEST 3 Mas 05 35 14.5 -05 22 30           ~ 2 0
13 M 42 HII 05 35 17 -05 23.4           ~ 4074 0
14 IRAS 05345+3556 HII 05 37 57.9 +35 58 41           ~ 15 0
15 NAME Ori A MoC 05 38 -07.1           ~ 3011 0
16 [HLB98] Onsala 51 Mas 05 39 12.9 +35 45 54           ~ 5 0
17 SH 2-231 Y*O 05 39 13.2 +35 45 48           ~ 131 0
18 SH 2-235 B HII 05 40 52.366 +35 41 29.43   17       ~ 179 1
19 [TFT95b] H2O 053731.864+354017.775 Mas 05 40 53.3 +35 41 49           ~ 8 0
20 SH 2-235 HII 05 41.1 +35 50           ~ 218 0
21 LBN 189.02+00.91 HII 06 08 23 +21 35.3           ~ 68 0
22 Caswell H2O 188.94+00.89 Mas 06 08 53.9 +21 38 37           ~ 10 0
23 [HLB98] Onsala 74 Mas 06 12 53.6 +17 59 27           ~ 2 0
24 MMB G192.600-00.048 Y*O 06 12 54.0100 +17 59 23.200           ~ 400 0
25 IC 2162 HII 06 13 04.1 +17 58 44           ~ 358 2
26 [HLB98] SEST 27 Mas 08 32 07.5 -43 13 46           ~ 5 1
27 DCld 264.3+01.5 DNe 08 54 42 -42 54.8           ~ 68 0
28 GAL 264.28+01.48 Mas 08 56 27.8 -43 05 05           ~ 7 0
29 RCW 34 HII 08 56 28.1 -43 05 58   10.5 11.21     ~ 96 0
30 V* V391 Vel Or* 08 56 28.109952 -43 05 55.40028 12.61 12.71 11.73 11.50   O8/8.5V 82 1
31 RCW 36 HII 08 59 00.9 -43 44 10     15.20     ~ 147 0
32 Caswell H2O 267.94-01.06 Mas 08 59 03.6 -47 30 47           ~ 13 0
33 RCW 38 SFR 08 59 05.50 -47 30 39.4           ~ 305 2
34 Caswell H2O 265.14+01.45 Mas 08 59 24.7 -43 45 22           ~ 9 0
35 [BSG89] 268.42-0.85 Mas 09 01 54.3 -47 43 59           ~ 7 0
36 [BSG89] 269.16-1.14 Mas 09 03 32.8 -48 28 40           ~ 5 0
37 GRS G270.26 +00.83 Rad 09 16.7 -47 57           ~ 2 0
38 [BE83] Maser 270.26+00.83 Mas 09 16 43 -47 56.6           ~ 7 0
39 TYC 8170-333-1 HII 09 16 58.2089265600 -47 57 47.393035668   13.36 12.96     ~ 23 0
40 IRC +10216 C* 09 47 57.40632 +13 16 43.5648           C9,5e 2342 0
41 OH 285.26-00.05 Mas 10 31 29.87 -58 02 18.0           ~ 22 0
42 [HLB98] SEST 44 Mas 10 38 30.6 -58 19 00           ~ 6 0
43 Caswell H2O 291.27-00.71 Mas 11 11 53.28 -61 18 24.1           ~ 14 0
44 OH 291.57-00.43 Mas 11 15 05.67 -61 09 41.0           ~ 14 0
45 NGC 3603 OpC 11 15 10.8 -61 15 32           ~ 1065 1
46 [BSG89] 294.97-1.73 Mas 11 39 13.94 -63 29 04.6           ~ 14 0
47 OH 300.97+01.15 Mas 12 34 53.29 -61 39 40.0           ~ 31 0
48 GUM 43 HII 12 34 54.4 -61 39 25           ~ 56 1
49 [BE83] Maser 301.12-00.20 Mas 12 35 24.3 -63 01 10           ~ 7 0
50 GRS G305.40 +00.20 HII 13 10 19 -62 38.5           ~ 33 0
51 OH 305.20+00.21 Mas 13 11 10.4904 -62 34 38.856           ~ 45 0
52 OH 305.36+00.15 Mas 13 12 35.86 -62 37 17.9           ~ 20 0
53 [SRM89] 13134-6242 Mas 13 16 42.9 -62 58 45           ~ 3 0
54 [HLB98] SEST 64 Mas 13 32 43.4 -60 26 46           ~ 2 0
55 GRS G308.60 +00.60 HII 13 39.9 -61 45           ~ 101 0
56 [HLB98] SEST 65 Mas 13 43 01.9 -62 08 51           ~ 2 0
57 [HLB98] SEST 67 Mas 13 50 42.4 -61 34 49           ~ 2 0
58 [HLB98] SEST 73 Mas 14 44 58.8 -59 48 09           ~ 2 0
59 [HLB98] SEST 74 Mas 14 45 25.0 -59 49 31           ~ 2 0
60 [HLB98] SEST 76 Mas 14 53 41.5 -59 08 54           ~ 2 0
61 [HLB98] SEST 83 Mas 15 31 43.4 -56 30 26           ~ 8 0
62 [HLB98] SEST 84 Mas 15 32 53.3 -55 56 19           ~ 2 0
63 IRAS 15394-5358 Y*O 15 43 18.97320 -54 07 35.6448           ~ 35 0
64 AGAL G326.641+00.612 smm 15 44 33.490 -54 05 31.00           ~ 17 0
65 [HLB98] SEST 90 Mas 15 54 04.6 -53 11 37           ~ 2 0
66 OH 328.81+00.63 Mas 15 55 47.3 -52 43 08           ~ 16 0
67 [HLB98] SEST 93 Mas 15 57 57.2 -53 58 45           ~ 3 0
68 OH 329.03-00.20 Mas 16 00 30.32 -53 12 27.3           ~ 14 0
69 [HLB98] SEST 98 Mas 16 09 52.2 -51 55 21           ~ 2 0
70 [HLB98] SEST 99 Mas 16 10 19.4 -52 06 03           ~ 2 0
71 [HLB98] SEST 100 Mas 16 11 24.5 -51 41 25           ~ 2 0
72 GAL 332.80-00.60 HII 16 19 47 -51 04.1           ~ 99 1
73 [HLB98] SEST 104 Mas 16 20 11.5 -50 52 55           ~ 2 0
74 [HLB98] SEST 105 Mas 16 20 59.7 -50 35 25           ~ 2 0
75 OH 333.6-00.2 Mas 16 22 11.042 -50 05 56.25           ~ 22 0
76 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1252 1
77 OH 337.40-00.41 Mas 16 38 50.52 -47 28 00.2           ~ 40 0
78 [HLB98] SEST 114 Mas 16 48 14.2 -45 21 42           ~ 2 0
79 Caswell CH3OH 345.01+01.80 Mas 16 56 46.82 -40 14 08.9           ~ 14 0
80 [HLB98] SEST 118 Mas 16 58 16.1 -42 52 23           ~ 2 0
81 OH 345.50+00.35 Mas 17 04 22.91 -40 44 21.7           ~ 49 0
82 OH 345.00-00.22 Mas 17 05 09.5 -41 29 04           ~ 34 0
83 [HLB98] SEST 124 Mas 17 09 33.7 -41 35 30           ~ 2 0
84 [HLB98] SEST 127 Mas 17 19 20.1 -39 04 01           ~ 2 0
85 [HLB98] SEST 128 Mas 17 19 24.5 -37 10 34           ~ 2 0
86 [HLB98] SEST 130 Mas 17 20 06.5 -38 57 18           ~ 2 0
87 BFS 65 HII 17 20 06.9 -38 57 34           ~ 78 0
88 OH 351.417+00.645 Mas 17 20 53.37 -35 47 01.2           ~ 12 0
89 [HLB98] SEST 134 Mas 17 25 26.2 -36 12 49           ~ 2 0
90 OH 351.75-00.53 Mas 17 26 42.57 -36 09 17.6           ~ 74 1
91 OH 353.41-00.36 Mas 17 30 26.18 -34 41 45.6           ~ 65 0
92 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 939 0
93 NAME Sgr A (NH3) ? 17 45 38.8 -29 05 11           ~ 2 0
94 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2265 1
95 Caswell CH3OH 359.97-00.46 Mas 17 47 21.3 -29 12 05           ~ 19 0
96 RAFGL 2271 SFR 18 53 18.54 +01 14 57.9           ~ 504 0
97 [HLB98] Onsala 91 Mas 18 53 18.7 +01 14 56           ~ 2 0
98 [HLB98] Onsala 92 Mas 18 56 10.4 +07 53 14           ~ 2 0
99 SH 2-76 E SFR 18 56 12 +07 53.4           ~ 35 0
100 W 49n HII 19 10 13.2 +09 06 12           ~ 469 3
101 [PCC93] 358 Mas 19 10 13.4100 +09 06 12.800           ~ 11 0
102 NAME W 51 Main reg 19 23 43.8 +14 30 37           ~ 143 0
103 [HHG86] 194414.0+242810 Mas 19 46 20.4 +24 35 34           ~ 3 0
104 SH 2-87 bub 19 46 20.69 +24 35 15.4           ~ 158 2
105 [HHG86] 194442.0+250530 Mas 19 46 47.6 +25 12 56           ~ 4 0
106 SH 2-88 B HII 19 46 48.2 +25 12 21           ~ 158 2
107 [BE83] Maser 070.29+01.60 Mas 20 01 45.5 +33 32 41           ~ 5 0
108 W 58a HII 20 01 45.8 +33 32 43           ~ 289 4
109 [KCW94] 069.540-00.975 HII 20 10 09.0 +31 31 35           ~ 168 1
110 IRAS 20081+3122 Y*O 20 10 09.036 +31 31 34.14           ~ 171 0
111 Onsala 1 cor 20 10 09.2036 +31 31 36.090           ~ 188 0
112 [HLB98] Onsala 126 Mas 20 20 38.5 +39 38 19           ~ 2 0
113 LBN 077.61+01.59 HII 20 20 39.3 +39 37 52           ~ 78 0
114 OH 075.8+00.3 HII 20 21 43.8 +37 26 39           ~ 94 2
115 GAL 075.78+00.34 cor 20 21 44.00 +37 26 38.0           ~ 126 1
116 NAME Cyg X FIR 33 Y*O 20 38 35.9 +42 37 22           B1.5 399 1
117 GAL 081.87+00.78 Mas 20 38 36.9 +42 37 38           ~ 8 0
118 [HLB98] Onsala 144 Mas 20 39 00.5 +42 22 49           ~ 3 0
119 W 75(OH) Rad 20 39 01.01 +42 22 49.9           ~ 39 0
120 NAME W 75S FIR 3 Y*O 20 39 02.97 +42 25 52.5           ~ 20 0
121 GAL 081.77+00.60 Mas 20 39 03.5 +42 25 53           ~ 7 0
122 NGC 7027 PN 21 07 01.571952 +42 14 10.47120   10.358 8.831 10.157   ~ 2458 1
123 [HLB98] Onsala 150 Mas 21 09 21.7320 +52 22 37.080           ~ 5 0
124 [PBC91] B213910.2+580229 Mas 21 40 42.2 +58 16 10           ~ 3 0
125 [BGE2002] BIMA 2 Y*O 21 40 42.36 +58 16 09.7           ~ 119 0
126 NAME IC 1396 North CGb 21 40 42.6537 +58 16 01.882           ~ 189 1
127 SH 2-152 HII 22 58 40.8107767416 +58 46 59.226036024           ~ 138 1
128 NAME SH 2-152 SE * 22 58 42.6 +58 47 45           ~ 51 1
129 [HLB98] Onsala 176 Mas 22 58 42.7 +58 47 09           ~ 2 0
130 [PCC93] 480 Mas 22 58 47.1 +58 45 11           ~ 2 0
131 NGC 7538 OpC 23 13 37 +61 30.0           ~ 877 1
132 GAL 111.53+00.76 Y*? 23 13 43.894 +61 26 50.53           ~ 10 0

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