2002ApJ...575..950O


Query : 2002ApJ...575..950O

2002ApJ...575..950O - Astrophys. J., 575, 950-973 (2002/August-3)

A complete search for dense cloud cores in Taurus.

ONISHI T., MIZUNO A., KAWAMURA A., TACHIHARA K. and FUKUI Y.

Abstract (from CDS):

We present the results of an H13CO+ J=1-0 survey for dense molecular condensations in Taurus. The observations were carried out with the 45 m telescope at Nobeyama on the basis of an extensive C18O survey made with the 4 m telescope at Nagoya University. The present survey is based purely on molecular line observations and thus provides the most extensive and uniform sample of high-density condensations. We detected 55 H13CO+ condensations, of which 44 are starless. These starless condensations are compact (R≲0.1 pc) and of high density (≳105 cm–3) and thus are highly probable candidates for protostellar condensations just before star formation. The striking feature of these starless compact condensations is the steep slope of the mass spectrum (dN/dM∼M–2.5 for 3.5M<M<20.1M). Under the assumption of uniform star formation efficiency, the spectrum resembles the stellar initial mass function (IMF) for a mass of ≲a few solar masses. This suggests that the stellar IMF is the result of the fragmentation process from relatively lower density cores. The statistical analysis of the starless condensations yields the lifetime of the condensations of ∼4x105 yr, which is several times longer than free-fall timescale. This short timescale compared with magnetic flux loss time may indicate that the timescale is determined by the dissipation timescale of turbulence.

Abstract Copyright:

Journal keyword(s): ISM: Clouds - ISM: Individual: Taurus Cloud Complex - ISM: Molecules - Radio Lines: ISM - Stars: Formation

Nomenclature: Table 1: [OMK2002] NNa (Nos 1-44), N=55.

CDS comments: P1454A = [BM89] 1-16, P1454B = [BM89] 1-18

Simbad objects: 145

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Number of rows : 145
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 IRAS 04016+2610 Y*O 04 04 43.07064 +26 18 56.3904           ~ 247 0
2 [OMK2002] 1a MoC 04 04 45.3 +26 19 58           ~ 1 0
3 LDN 1489 DNe 04 04 47.5 +26 19 42           ~ 214 0
4 [OMK2002] 1b MoC 04 04 47.6 +26 18 58           ~ 1 0
5 NAME [BM89] L1498 PoC 04 10 51.4 +25 09 58           ~ 187 0
6 JCMTSF J041053.0+250931 MoC 04 10 53.6 +25 09 28           ~ 2 0
7 LDN 1498 DNe 04 11.0 +24 58           ~ 270 0
8 HGBS J041335.4+282117 cor 04 13 35.8 +28 21 11           ~ 4 0
9 IRAS 04108+2803 mul 04 13 54.9 +28 11 31           ~ 90 1
10 NAME [BM89] L1495 PoC 04 14 08.2 +28 09 31           ~ 170 0
11 [OMK2002] 4 MoC 04 14 10.2 +28 09 45           ~ 1 0
12 V* FN Tau Or* 04 14 14.5945463760 +28 27 58.067731188     14.70 13.68   M5 152 0
13 V* CW Tau Or* 04 14 17.0042670144 +28 10 57.766508508 13.92 13.64 12.36 12.86   K0Ve 337 0
14 LDN 1495D DNe 04 14 18.2 +28 15 52           ~ 11 0
15 IRAS 04113+2758 ** 04 14 26.31 +28 06 04.5           ~ 59 0
16 V* FO Tau Or* 04 14 49.2843205392 +28 12 30.505096476       14.92   M3.5e+M3.5e 120 0
17 HGBS J041741.9+280846 cor 04 17 41.8 +28 08 47           ~ 9 0
18 HGBS J041751.9+281232 cor 04 17 52.0 +28 12 26           ~ 4 0
19 HGBS J041803.8+282304 cor 04 18 03.8 +28 23 06           ~ 8 0
20 LDN 1495 DNe 04 18.1 +27 37           ~ 334 1
21 HGBS J041807.8+280506 cor 04 18 08.4 +28 05 12           ~ 10 0
22 [HTK2013] 7 cor 04 18 11.5 +27 35 15           ~ 9 0
23 [MOH94] 1 PoC 04 18 12.7 +27 36 00           ~ 4 0
24 [BM89] 1-16 PoC 04 18 23.6 +28 20 36           ~ 2 0
25 [OMK2002] 10a MoC 04 18 29.5 +27 26 24           ~ 1 0
26 NAME [BM89] L1506 PoC 04 18 31.1 +25 19 25           ~ 43 0
27 IRAS 04154+2823 Y*O 04 18 32.0443900008 +28 31 14.971419300           M2.5 61 0
28 [OMK2002] 11 MoC 04 18 34.4 +28 26 12           ~ 3 0
29 [OMK2002] 10b MoC 04 18 38.5 +27 24 03           ~ 1 0
30 V* V892 Tau Ae* 04 18 40.6157618376 +28 19 15.625058880   16.6 14.69 14.35   A0Ve 282 0
31 [BM89] 1-18 PoC 04 18 45.1 +28 20 35           ~ 2 0
32 [OMK2002] 12a MoC 04 18 46.0 +27 19 40           ~ 1 0
33 IRAS 04158+2805 Y*O 04 18 58.1336295120 +28 12 23.355499140           M5.25 94 0
34 [OMK2002] 12b MoC 04 18 58.3 +27 16 45           ~ 1 0
35 HGBS J041937.7+271526 cor 04 19 37.6 +27 15 31           ~ 16 0
36 [MOH94] 7 PoC 04 19 42.4 +27 13 24           ~ 4 0
37 [HTK2013] 11 MoC 04 19 42.4 +27 13 24           ~ 5 0
38 IRAS 04166+2706 Y*O 04 19 42.62736 +27 13 38.4312           ~ 126 0
39 [MOH94] 8 PoC 04 19 57.3 +27 10 02           ~ 5 0
40 [OMK2002] 14 MoC 04 19 57.8 +27 10 10           ~ 3 0
41 IRAS 04169+2702 Y*O 04 19 58.44936 +27 09 57.0672           K0-M4 109 1
42 LDN 1506 DNe 04 20.0 +25 17           ~ 77 0
43 [OMK2002] 15 MoC 04 20 28.3 +27 02 37           ~ 1 0
44 Barnard 213 DNe 04 20 51 +27 16.3           ~ 190 0
45 [OMK2002] 16a cor 04 20 52.5 +27 02 20           ~ 3 0
46 IRAS 04181+2655 mul 04 21 10.9 +27 02 06           ~ 51 0
47 IRAS 04181+2654 Y*O 04 21 11.46888 +27 01 09.4044           G0-M3 61 0
48 [OMK2002] 16b MoC 04 21 14.1 +27 01 11           ~ 3 0
49 [OMK2002] 17 MoC 04 21 48.0 +26 55 53           ~ 1 0
50 [DB2002b] G169.18-14.88 DNe 04 21.9 +28 32           ~ 10 0
51 [OMK2002] 18a MoC 04 21 56.9 +15 29 47           ~ 3 0
52 IRAS 04191+1523 Y*O 04 22 00.43944 +15 30 21.2148           ~ 195 0
53 [MOH94] 9 PoC 04 22 01.1 +15 30 17           ~ 2 0
54 [OMK2002] 18b MoC 04 22 01.1 +15 30 17           ~ 3 0
55 V* FS Tau Or* 04 22 02.1798627024 +26 57 30.575293308 17.57   14.10 15.63   M3.5e+M0e 269 0
56 Barnard 215 DNe 04 23.6 +25 02           ~ 22 0
57 [OMK2002] 19 MoC 04 23 36.5 +25 05 55           ~ 1 0
58 V* FT Tau Or* 04 23 39.1888788312 +24 56 14.250818940   16.15 14.93 14.70   M2.8 127 0
59 [OMK2002] 20 MoC 04 23 45.8 +26 33 54           ~ 1 0
60 [OMK2002] 21 MoC 04 23 59.8 +26 40 51           ~ 1 0
61 Barnard 216 DNe 04 24.0 +26 37           ~ 48 0
62 NAME [BM89] L1521B cor 04 24 12.7 +26 36 53           ~ 68 0
63 [OMK2002] 22 MoC 04 24 14.9 +26 37 09           ~ 1 0
64 [OMK2002] 23 MoC 04 26 32.2 +24 35 53           ~ 1 0
65 [OMK2002] 24 MoC 04 26 34.5 +24 41 42           ~ 1 0
66 IRAS 04239+2436 Y*O 04 26 56.29704 +24 43 35.3280           ~ 152 0
67 LDN 1521D DNe 04 27 46.5 +26 18 52           ~ 215 0
68 Barnard 217 DNe 04 27 46.5 +26 17 52           ~ 89 0
69 [OMK2002] 25 MoC 04 27 48.7 +26 18 22           ~ 1 0
70 [MOH94] 10 PoC 04 27 56.1 +26 19 28           ~ 2 0
71 JCMTSF J042756.6+261919 MoC 04 27 56.7 +26 19 20           ~ 3 0
72 IRAS 04248+2612 Y*O 04 27 57.3239527944 +26 19 18.033264696           M 147 0
73 LDN 1524 DNe 04 27 57.7 +24 39 18           ~ 79 0
74 [OMK2002] 26b MoC 04 27 57.8 +26 19 50           ~ 3 0
75 [OMK2002] 27 MoC 04 28 39.3 +26 51 39           ~ 1 0
76 LDN 1521F DNe 04 28 39.3 +26 51 43           ~ 195 1
77 IRAS 04260+2642 Y*O 04 29 04.9825788768 +26 49 07.187553480           K6 52 0
78 IRC +20082 AB* 04 29 07.6303239624 +24 43 50.048839668   20.57 17.37   10.45 M8III 73 0
79 [OMK2002] 28 MoC 04 29 19.6 +24 33 15           ~ 1 0
80 V* GV Tau TT* 04 29 23.7314759229 +24 33 00.216016292 19.20         K7 280 0
81 [OMK2002] 29 MoC 04 30 00.4 +24 25 53           ~ 2 0
82 V* FX Tau Or* 04 30 29.618064 +24 26 45.02724   15.18 13.61 13.21   M4 151 0
83 Bad 16 Y*O 04 30 50.2774891944 +23 00 08.757461592       14.95   F1 139 0
84 V* ZZ Tau Or* 04 30 51.3867375744 +24 42 22.335046020     12.90 13.97   M2.5V+M3.5V 137 0
85 LDN 1551 DNe 04 31 30.0 +18 12 30           ~ 794 1
86 RAFGL 5123 Y*O 04 31 34.07736 +18 08 04.9020           K3V/M3III 841 0
87 [MOH94] 11 PoC 04 31 34.1 +18 08 20           ~ 2 0
88 [OMK2002] 30 MoC 04 31 34.1 +18 08 20           ~ 1 0
89 V* HK Tau TT* 04 31 50.5715875272 +24 24 17.775307548 16.81 16.689 15.292     M0.5 325 1
90 [OMK2002] 31 MoC 04 31 55.7 +24 32 09           ~ 3 0
91 JCMTSF J043155.5+243254 PoC 04 31 55.9 +24 32 49           ~ 42 0
92 [OMK2002] 32 MoC 04 32 08.8 +24 28 08           ~ 2 0
93 Haro 6-13 Or* 04 32 15.4174258632 +24 28 59.577717108 19.22   17.7     M0 200 1
94 V* FY Tau Or* 04 32 30.5784243120 +24 19 57.359889192 17.83 18.05 13.49 14.17   M0.1 109 0
95 IRAS 04294+2413 Y*O 04 32 31.4 +24 20 02           ~ 9 0
96 V* FZ Tau Or* 04 32 31.7627107344 +24 20 03.056011548 16.15     15.04   M0 133 0
97 IRAS 04295+2251 Y*O 04 32 32.05488 +22 57 26.6724           K0-M4 91 0
98 [OMK2002] 33a MoC 04 32 35.1 +24 24 06           ~ 2 0
99 V* UZ Tau Y*O 04 32 42.81 +25 52 31.3           M4Ve+M1/3Ve 301 0
100 [OMK2002] 33b MoC 04 32 43.8 +24 24 06           ~ 3 0
101 NAME Kutner's Cloud MoC 04 32 44.6 +24 23 13           ~ 219 0
102 NAME [BM89] TMC-2 PoC 04 32 44.7 +24 25 13           ~ 186 0
103 JH 112 TT* 04 32 49.1168400816 +22 53 02.847144336 18.81     14.982   K5.5 68 0
104 LDN 1521 DNe 04 33.1 +26 06           ~ 56 0
105 V* GH Tau Or* 04 33 06.2186830512 +24 09 33.584489856     13.20 12.59   M3Ve 179 0
106 V* V807 Tau Or* 04 33 06.6358574736 +24 09 54.977968116   12.10 11.21 11.18   K7 142 2
107 IRAS S04301+2608 Y*O 04 33 14.3617327872 +26 14 23.463738708           M0 37 0
108 IRAS 04302+2247 Y*O 04 33 16.50096 +22 53 20.4000           ~ 160 0
109 IRAS 04303+2240 Y*O 04 33 19.0778932752 +22 46 34.130048412           M0.5 71 0
110 [OMK2002] 34 MoC 04 33 24.3 +22 42 16           ~ 1 0
111 LDN 1536 DNe 04 33 24.6 +22 43 29           ~ 103 0
112 V* GI Tau Or* 04 33 34.0609697160 +24 21 17.068989852 14.34   13.70 12.15 11.06 K5Ve 270 1
113 V* GK Tau Or* 04 33 34.5630097872 +24 21 05.855136732 15.50   13.00 12.02 10.62 K7:Ve 291 0
114 [MOH94] 5 PoC 04 33 37 +22 42.4           ~ 3 0
115 V* CI Tau Or* 04 33 52.0143963264 +22 50 30.094090908 14.97 15.09 13.80     K4IVe 314 1
116 [MOH94] 12 PoC 04 35 33.9 +24 08 22           ~ 2 0
117 IRAS 04325+2402 Y*O 04 35 35.39160 +24 08 19.4244           ~ 155 0
118 [OMK2002] 35 MoC 04 35 36.3 +24 09 04           ~ 2 0
119 [OMK2002] 36a MoC 04 35 51.0 +24 09 03           ~ 1 0
120 JCMTSF J043550.4+240935 MoC 04 35 51.0 +24 09 43           ~ 2 0
121 IRAS 04361+2547 Y*O 04 39 13.89288 +25 53 20.8788           ~ 190 1
122 [OMK2002] 37 MoC 04 39 17.8 +25 52 48           ~ 1 0
123 [OMK2002] 38 MoC 04 39 26.5 +25 47 47           ~ 1 0
124 [MOH94] 14 PoC 04 39 32.8 +25 41 47           ~ 2 0
125 IRAS 04365+2535 Y*O 04 39 35.19360 +25 41 44.7252           ~ 264 0
126 LDN 1527 DNe 04 39 53 +25 45.0           ~ 578 0
127 [OMK2002] 41 MoC 04 39 53.2 +25 44 46           ~ 1 0
128 [OMK2002] 40 MoC 04 39 53.6 +26 03 21           ~ 1 0
129 [MOH94] 15 PoC 04 39 53.6 +26 03 21           ~ 2 0
130 IRAS 04368+2557 Y*O 04 39 53.97816 +26 03 09.6804           ~ 260 0
131 IRAS 0437+257P08 Y*O 04 39 55.7457478224 +25 45 01.941104988           B5 167 1
132 IRAS 04370+2559 Y*O 04 40 08.0045430960 +26 05 25.434085020           M 56 0
133 [OMK2002] 42a MoC 04 40 29.5 +25 29 43           ~ 2 0
134 [OMK2002] 42b MoC 04 40 38.4 +25 29 12           ~ 2 0
135 [THL2004] HCL-2Ec MoC 04 40 41.6 +25 30 26           ~ 2 0
136 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4020 0
137 IRAS 04381+2540 Y*O 04 41 12.67920 +25 46 35.4216           K0-M2 125 1
138 TMC-1B PoC 04 41 13.2 +25 49 25           ~ 16 0
139 [OMK2002] 43 MoC 04 41 20.0 +25 48 49           ~ 2 0
140 [OMK2002] 44 MoC 04 41 37.2 +25 59 42           ~ 1 0
141 Barnard 220 DNe 04 41 38.8 +26 00 42           ~ 130 0
142 Haro 6-33 TT* 04 41 38.8257958224 +25 56 26.741499648     18.40     M0.5 112 2
143 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1548 0
144 LDN 1534 DNe 04 41 46 +25 41.4           ~ 45 0
145 LDN 1495SE DNe ~ ~           ~ 2 0

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2022.10.06-16:40:05

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