2009ApJ...699..585H

Query : 2009ApJ...699..585H

2009ApJ...699..585H - Astrophys. J., 699, 585-602 (2009/July-1)

A search for carbon-chain-rich cores in dark clouds.

HIROTA T., OHISHI M. and YAMAMOTO S.

Abstract (from CDS):

We present results of a survey of CCS, HC3N, and HC5 N toward 40 dark cloud cores to search for "Carbon-Chain-Producing Regions (CCPRs)," where carbon-chain molecules are extremely abundant relative to NH3, as in L1495B, L1521B, L1521E, and the cyanopolyyne peak of TMC-1. We have mainly observed toward cores where the NH3 lines are weak, not detected, or not observed in previous surveys, and the CCS, HC3N, and HC5 N lines have been detected toward 17, 17, and 5 sources, respectively. Among them, we have found a CCPR, L492, and its possible candidates, L1517D, L530D, L1147, and L1172B. They all show low abundance ratios of [NH3]/[CCS] (hereafter called the NH3/CCS ratio) indicating the chemical youth. Combining our results with those of previous surveys, we have found a significant variation of the NH3/CCS ratio among dark cloud cores and among molecular cloud complexes. Such a variation is also suggested by the detection rates of carbon-chain molecules. For instance, the NH3/CCS ratios are higher and the detection rates of carbon-chain molecules are lower in the Ophiuchus cores than in the Taurus cores. An origin of these systematic abundance variation is discussed in terms of the difference in the evolutionary stage or the contraction timescale. We have also identified a carbon-chain-rich star-forming core, L483, where intense HC3 N and HC5N lines are detected. This is a possible candidate for a core with "Warm Carbon-Chain Chemistry."

Abstract Copyright: ∼

Journal keyword(s): ISM: abundances - ISM: molecules - molecular processes

CDS comments: IRAS 04018+2803 is a msiprint for IRAS 04108+2803.

Simbad objects: 147

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Number of rows : 147
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 LDN 1455 IRS 1 cor 03 27 39.08 +30 13 03.1           ~ 173 0
2 LDN 1455 DNe 03 28 00.6480 +30 07 58.800           ~ 198 1
3 IRAS 03267+3128 cor 03 29 51.82 +31 39 06.0           ~ 58 0
4 Barnard 1 MoC 03 33 16.3 +31 07 51           ~ 350 0
5 2MASS J03331667+3107548 Y*O 03 33 16.68 +31 07 54.9           ~ 139 2
6 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1553 0
7 NAME Per Region reg 03 37 00.0 +31 15 00           ~ 296 0
8 NAME [BM89] B5 DNe 03 47 38.3 +32 52 43           ~ 224 0
9 IRAS 03445+3242 Y*O 03 47 41.603 +32 51 43.79           ~ 215 0
10 LDN 1471 DNe 03 48.0 +32 54           ~ 349 0
11 IRAS 04016+2610 Y*O 04 04 43.07064 +26 18 56.3904           ~ 284 0
12 LDN 1489 DNe 04 04 47.5 +26 19 42           ~ 238 0
13 LDN 1400K DNe 04 10 48.6 +54 53 14           ~ 32 0
14 NAME [BM89] L1498 PoC 04 10 51.4 +25 09 58           ~ 187 0
15 LDN 1498 DNe 04 11.0 +24 58           ~ 306 0
16 LDN 1495C DNe 04 13 30.6 +28 15 55           ~ 6 0
17 LDN 1495N DNe 04 13 50.2 +28 12 32           ~ 9 0
18 IRAS 04108+2803 mul 04 13 54.9 +28 11 31           ~ 94 1
19 NAME [BM89] L1495 PoC 04 14 08.2 +28 09 31           ~ 172 0
20 LDN 1495D DNe 04 14 18.2 +28 15 52           ~ 11 0
21 LDN 1495B DNe 04 15 36.5 +28 46 06           ~ 50 0
22 LDN 1495 DNe 04 18.1 +27 37           ~ 408 1
23 NAME [BM89] L1506 PoC 04 18 31.1 +25 19 25           ~ 43 0
24 LDN 1521C DNe 04 19 19.2 +27 16 29           ~ 11 0
25 LDN 1506 DNe 04 20.0 +25 17           ~ 81 0
26 NAME [BM89] L1521B cor 04 24 12.7 +26 36 53           ~ 76 0
27 LDN 1400B DNe 04 24 46.6 +55 01 53           ~ 6 0
28 LDN 1521A DNe 04 26 43.8 +26 15 48           ~ 14 0
29 LDN 1521D DNe 04 27 46.5 +26 18 52           ~ 215 0
30 LDN 1400E DNe 04 28 28.5 +54 47 36           ~ 4 0
31 NAME [BM89] L1521E DNe 04 29 21.0 +26 14 19           ~ 116 1
32 LDN 1400F DNe 04 29 51.4 +54 14 19           ~ 5 0
33 LDN 1551A DNe 04 30 58.0 +18 17 10           ~ 5 0
34 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 823 1
35 LDN 1551S DNe 04 31 33.9 +18 08 15           ~ 11 0
36 RAFGL 5123 Y*O 04 31 34.07736 +18 08 04.9020           K3V/M3III 900 0
37 V* V1213 Tau Or* 04 31 37.5055489536 +18 12 24.383952396           K7 605 0
38 V* HK Tau TT* 04 31 50.5715875272 +24 24 17.775307548 16.81 16.689 15.292     M0.5 358 1
39 JCMTSF J043155.5+243254 PoC 04 31 55.9 +24 32 49           ~ 42 0
40 LDN 1445 DNe 04 32.1 +46 36           ~ 17 0
41 Haro 6-13 Or* 04 32 15.4174258632 +24 28 59.577717108 19.22   17.7     M0 233 1
42 NAME Kutner's Cloud MoC 04 32 44.6 +24 23 13           ~ 283 0
43 NAME [BM89] TMC-2 PoC 04 32 44.7 +24 25 13           ~ 188 0
44 NAME [BM89] L1536 DNe 04 33 21.3 +22 44 26           ~ 14 0
45 LDN 1527 DNe 04 39 53 +25 45.0           ~ 689 0
46 IRAS 04368+2557 Y*O 04 39 53.97816 +26 03 09.6804           ~ 309 0
47 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
48 IRAS 04381+2540 Y*O 04 41 12.67920 +25 46 35.4216           K0-M2 133 1
49 TMC-1 CP Cld 04 41 34.97 +25 38 53.2           ~ 69 1
50 Barnard 220 DNe 04 41 38.8 +26 00 42           ~ 141 0
51 Haro 6-33 TT* 04 41 38.8257958224 +25 56 26.741499648     18.40     M0.5 140 2
52 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1872 0
53 LDN 1517C PoC 04 54 47.4 +30 34 48           ~ 20 0
54 LDN 1517A PoC 04 55 06.3 +30 33 40           ~ 25 0
55 NAME [BM89] L1517B cor 04 55 18.8 +30 38 04           ~ 163 0
56 LDN 1517D PoC 04 55 48.1 +30 38 46           ~ 15 0
57 LDN 1512 MoC 05 04 09.7 +32 43 09           ~ 184 0
58 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 965 0
59 NAME [BM89] L1544 cor 05 04 22.5 +25 11 36           ~ 437 1
60 LDN 1523 DNe 05 06 13.8 +31 42 20           ~ 52 1
61 NAME [BM89] L1523 PoC 05 06 22.9 +31 41 19           ~ 45 0
62 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 623 0
63 NAME LDN 1641 North HII 05 36 17.6 -06 22 10           ~ 252 0
64 NAME NGC 2071-North PoC 05 47 42.3 +00 38 40           ~ 17 0
65 NAME Orion Molecular Cloud MoC 05 56 -01.8           ~ 1227 1
66 LDN 1778A DNe 15 39 27.5 -07 10 09           ~ 13 0
67 LDN 183N DNe 15 54 09.157 -02 49 38.97           ~ 5 0
68 LDN 183S DNe 15 54 09.2 -02 51 39           ~ 7 0
69 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 799 1
70 LDN 1721 DNe 16 14 28.1 -18 54 44           ~ 27 0
71 LDN 1719B DNe 16 22 12.3 -19 38 41           ~ 17 0
72 LDN 1687 DNe 16 23.0 -23 37           ~ 9 0
73 * rho Oph ** 16 25 35.11766 -23 26 49.8150 4.30 4.85 4.63 4.27 3.96 B2IV+B2V 670 0
74 LDN 1681A DNe 16 26 26.6 -24 34 16           ~ 10 0
75 YLW 16A Y*O 16 27 28.02744 -24 39 33.5052           K8 205 0
76 LDN 1681B DNe 16 27 35.7 -24 43 26           ~ 27 0
77 LDN 1690 DNe 16 27 46.3 -24 16 59           ~ 11 0
78 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
79 NAME Ophiuchus D MoC 16 28 29.2 -24 18 25           ~ 122 0
80 LDN 1696B cor 16 28 59.3 -24 20 43           ~ 20 0
81 LDN 1709A DNe 16 30 50.7 -23 41 03           ~ 25 0
82 IRAS 16285-2356 FIR 16 31 34.8 -24 02 55           ~ 10 0
83 LDN 1709 DNe 16 31 34.8 -24 02 55           ~ 84 0
84 LDN 1709B DNe 16 31 53.2 -23 57 35           ~ 28 0
85 LDN 1689A DNe 16 32 12.5 -25 02 53           ~ 26 0
86 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1357 1
87 LDN 1689N DNe 16 32 25.96 -24 28 46.2           ~ 121 0
88 LDN 1709C DNe 16 33 53.3 -23 38 32           ~ 12 0
89 HBC 650 TT* 16 34 29.32 -15 47 01.4           K3.0 184 2
90 LDN 43E DNe 16 34 37.5 -15 47 01           ~ 19 0
91 LDN 1689B DNe 16 34 42.1 -24 36 11           ~ 181 0
92 LDN 260 DNe 16 46 58.2 -09 36 20           ~ 43 0
93 2MASS J16465826-0935197 Y*O 16 46 58.2599324664 -09 35 20.090942592   19.6 17.4     ~ 38 0
94 IRAS 16445-1352 FIR 16 47 23.2 -13 57 21           ~ 11 0
95 LDN 191 DNe 16 47.8 -12 45           ~ 13 0
96 LDN 204F cor 16 47 48.4 -11 56 06           ~ 6 0
97 LDN 158 DNe 16 47 50 -14 05.3           ~ 33 0
98 IRAS 16451-1054 FIR 16 47 54.7 -11 00 13           ~ 5 0
99 IRAS 16451-1045 FIR 16 47 55.9 -10 51 09           ~ 8 0
100 LDN 234E DNe 16 48 04.5 -10 56 58           ~ 26 0
101 LDN 234A DNe 16 48 06.9 -10 51 48           ~ 23 0
102 LDN 63 DNe 16 50 15.5 -18 06 06           ~ 76 0
103 LDN 57 DNe 17 22 38.2 -23 49 34           ~ 336 1
104 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 442 1
105 LDN 492 DNe 18 15 51 -03 44.4           ~ 50 0
106 [LM99] L429-1 cor 18 17 11.6 -08 13 30           ~ 12 0
107 [LM99] L429-2 cor 18 17 16.3 -08 17 52           ~ 6 0
108 IRAS 18148-0440 Y*O 18 17 29.94 -04 39 39.3           ~ 97 0
109 LDN 483 DNe 18 17 35 -04 39.8           ~ 359 0
110 NAME Aql Region reg 18 31.1 -02 10           ~ 456 0
111 NAME Aql Rift DNe 18 32 -01.0           ~ 355 1
112 LDN 530H DNe 18 49 28.4 -04 57 40           ~ 3 0
113 LDN 530D DNe 18 49 57.3 -04 49 49           ~ 8 0
114 LDN 531 DNe 19 06 10.0 -06 53 45           ~ 67 0
115 [S2009] L723 XMM 8 * 19 17 53.1327617040 +19 12 16.426495764           ~ 39 0
116 LDN 723 DNe 19 18 12 +19 13.6           ~ 155 0
117 IRAS 19243+2352 FIR 19 26 30.0 +23 58 15           ~ 13 1
118 LDN 778 DNe 19 26 32.5 +23 58 42           ~ 51 1
119 LDN 663 DNe 19 36 55 +07 34.4           ~ 698 0
120 IRAS 19345+0727 cor 19 37 00.7 +07 34 08           ~ 96 0
121 IRAS 20353+6742 Y*O 20 35 46.325 +67 53 02.00           ~ 39 0
122 LDN 1152 DNe 20 35 50.2 +67 54 22           ~ 73 0
123 NAME LDN 1157-mm Y*O 20 39 06.2 +68 02 15           ~ 204 0
124 LDN 1157 DNe 20 39 06.4 +68 02 13           ~ 606 0
125 LDN 1148 DNe 20 40 31.6 +67 21 45           ~ 68 0
126 LDN 1147 DNe 20 40 32 +67 20.7           ~ 35 0
127 LDN 1155H DNe 20 43 06.3 +67 46 27           ~ 8 0
128 LDN 1155C DNe 20 43 18.1 +67 50 36           ~ 30 0
129 NAME [BM89] L1155D DNe 20 43 49.7 +67 36 29           ~ 13 0
130 IRAS 20520+6003 MIR 20 53 13.467 +60 14 42.55           ~ 16 1
131 LDN 1082A DNe 20 53 29.6 +60 14 40           ~ 43 1
132 LDN 1082B DNe 20 53 50.3 +60 09 47           ~ 17 0
133 IRAS 20526+5958 FIR 20 53 50.4 +60 09 48           ~ 14 1
134 IRAS 20582+7724 Y*O 20 57 12.9250225656 +77 35 43.656301932           ~ 119 0
135 LDN 1228 DNe 20 57 13 +77 35.8           ~ 131 0
136 RNO 129 Y*O 20 59 14.08512 +78 23 04.0020       15.30   G:e 50 1
137 LDN 1172D DNe 21 02 08.9 +67 53 54           ~ 15 0
138 IRAS 21017+6742 Y*O 21 02 21.23 +67 54 20.2           ~ 35 1
139 LDN 1172A DNe 21 02 27.7 +67 54 08           ~ 24 0
140 IRAS 21025+6801 Y*O 21 03 12.1 +68 13 01           ~ 10 0
141 LDN 1172B DNe 21 03 31.9 +68 11 59           ~ 11 0
142 LDN 970 DNe 21 12 13.1 +47 23 23           ~ 67 0
143 IRAS 21106+4712 mul 21 12 26.2 +47 24 24           ~ 20 0
144 NAME Cepheus Region reg 21 20 00.0 +72 30 00           ~ 126 0
145 IRAS 22376+7455 TT* 22 38 42.5032929744 +75 11 45.489819660   17.65 16.10 14.90 13.62 ~ 53 0
146 LDN 1251E DNe 22 39 18.3 +75 14 31           ~ 18 0
147 LDN 1527A DNe ~ ~           ~ 4 0

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