2000MNRAS.311...63J

Query : 2000MNRAS.311...63J

2000MNRAS.311...63J - Mon. Not. R. Astron. Soc., 311, 63-74 (2000/January-1)

A far-infrared survey of molecular cloud cores.

JESSOP N.E. and WARD-THOMPSON D.

Abstract (from CDS):

We present a catalogue of molecular cloud cores drawn from high-latitude, medium-opacity clouds, using the all-sky IRAS Sky Survey Atlas (ISSA) images at 60 and 100µm. The typical column densities of the cores are N(H2)∼3.8x1021cm–2 and the typical volume densities are n(H2)∼2x103cm–3. They are therefore significantly less dense than many other samples obtained in other ways. Those cloud cores with IRAS point sources are seen to be already forming stars, but this is found to be only a small fraction of the total number of cores. The fraction of the cores at the protostellar stage is used to estimate the pre-stellar time-scale - the time until the formation of a hydrostatically supported protostellar object. We argue, on the basis of a comparison with other samples, that a trend exists for the pre-stellar lifetime of a cloud core to decrease with the mean column density and number density of the core. We compare this with model predictions and show that the data are consistent with star formation regulated by the ionization fraction.

Abstract Copyright: 2000, Royal Astronomical Society

Journal keyword(s): catalogues - surveys - stars: formation - ISM: globules - infrared: ISM: continuum

Nomenclature: Table 1: JWT Cloud FFFA N=16. Table 2: JWT Core NN (Nos 1-60).

Simbad objects: 116

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Number of rows : 116
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 JWT Cloud 21A Cld 00 03 -75.7           ~ 1 0
2 JWT Cloud 270A Cld 00 05 +14.1           ~ 1 0
3 JWT Core 1 PoC 00 05 37 +14 13.2           ~ 1 0
4 JWT Core 2 PoC 01 25 54 +76 57.2           ~ 1 0
5 IRAS 01226+7641 FIR 01 26 56.8 +76 57 09           ~ 1 0
6 JWT Core 3 PoC 01 32 17 +76 59.9           ~ 1 0
7 JWT Cloud 422A Cld 01 34 +76.8           ~ 1 0
8 Cl Berkeley 8 OpC 02 01 13.4 +75 29 20           ~ 24 0
9 JWT Core 4 PoC 02 08 11 +76 06.1           ~ 1 0
10 JWT Cloud 2B Cld 02 25 -84.8           ~ 1 0
11 JWT Core 5 PoC 02 25 51 +75 36.4           ~ 1 0
12 JWT Core 6 PoC 02 27 01 -84 42.8           ~ 1 0
13 JWT Core 7 PoC 02 41 34 +75 09.9           ~ 1 0
14 IRAS 02368+7453 TT* 02 42 00.5672785851 +75 05 47.284230940           K7IIIe 7 0
15 JWT Core 8 PoC 03 00 13 +81 12.3           ~ 1 0
16 IRAS 02532+8102 FIR 03 00 45.8 +81 14 04           ~ 1 0
17 JWT Cloud 423B Cld 03 08 +81.5           ~ 1 0
18 IRAS 03139+8151 * 03 22 30.7735807848 +82 02 25.680822504   13.44 11.53     ~ 1 0
19 JWT Core 9 PoC 03 24 30 +82 01.0           ~ 1 0
20 BD+81 108 * 03 27 43.5953222352 +81 58 07.648293864   10.81 9.15     K5 2 0
21 JWT Core 10 PoC 04 19 38 +64 26.3           ~ 1 0
22 JWT Cloud 411A Cld 04 20 +64.5           ~ 1 0
23 JWT Core 11 PoC 04 21 40 +64 14.3           ~ 1 0
24 HD 237250 * 04 22 21.4811916216 +60 15 37.575572292   10.93 9.05     K5 3 0
25 JWT Core 12 PoC 04 22 25 +64 21.9           ~ 1 0
26 IRAS 04178+6416 FIR 04 22 28.8 +64 23 45           ~ 1 0
27 JWT Core 13 PoC 04 23 33 +64 00.9           ~ 1 0
28 JWT Core 14 PoC 04 27 11 +05 01.1           ~ 1 0
29 IRAS 04250+0502 FIR 04 27 40.5 +05 08 59           ~ 1 0
30 JWT Core 15 PoC 04 28 02 +04 36.8           ~ 1 0
31 JWT Core 16 PoC 04 29 05 +04 37.0           ~ 1 0
32 JWT Cloud 205A Cld 04 31 +04.1           ~ 1 0
33 JWT Core 17 PoC 04 31 40 +03 55.3           ~ 1 0
34 JWT Core 18 PoC 04 32 56 +03 44.1           ~ 1 0
35 JWT Core 19 PoC 04 32 58 +03 24.5           ~ 1 0
36 JWT Core 20 PoC 04 33 10 +03 53.2           ~ 1 0
37 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 579 0
38 Cl Melotte 66 OpC 07 26 17.5 -47 41 06   8.73       ~ 196 0
39 JWT Cloud 50A Cld 07 27 -48.1           ~ 1 0
40 JWT Core 21 PoC 07 27 29 -48 16.4           ~ 1 0
41 JWT Core 22 PoC 07 28 04 -48 00.7           ~ 1 0
42 JWT Core 23 PoC 07 30 44 -47 00.8           ~ 1 0
43 [DB2002b] G259.23-13.23 DNe 07 31.0 -47 00           ~ 10 0
44 MSH 07+4-08 Rad 07 31.4 -46 50           ~ 1 0
45 IRAS 07299-4644 FIR 07 31 24.4 -46 50 39           ~ 1 0
46 IRAS 07300-4653 IR 07 31 32.3 -46 59 48           ~ 1 0
47 IRAS 07305-4659 FIR 07 31 59.9 -47 05 52           ~ 1 0
48 JWT Core 24 PoC 07 33 58 -46 56.8           ~ 1 0
49 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1154 1
50 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 806 0
51 JWT Core 25 PoC 15 32 49 -03 33.6           ~ 1 0
52 JWT Core 26 PoC 15 41 40 -03 33.8           ~ 1 0
53 IRAS 15395-0330 FIR 15 42 11.0 -03 39 41           ~ 1 0
54 JWT Core 27 PoC 15 43 13 -03 25.6           ~ 1 0
55 JWT Core 28 PoC 15 46 03 -03 59.9           ~ 1 0
56 JWT Core 29 PoC 15 46 59 -03 58.6           ~ 1 0
57 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 759 1
58 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3628 1
59 LDN 133 DNe 17 58.7 -26 05           ~ 7 0
60 JWT Core 30 PoC 18 10 02 -75 28.3           ~ 1 0
61 JWT Core 31 PoC 18 19 56 -75 27.1           ~ 1 0
62 JWT Core 33 PoC 18 39 50 -74 13.4           ~ 1 0
63 IRAS 18333-7547 FIR 18 40 15.7 -75 44 30           ~ 1 0
64 JWT Core 32 PoC 18 40 18 -75 57.6           ~ 1 0
65 JWT Core 34 PoC 18 40 41 -75 42.9           ~ 1 0
66 JWT Core 35 PoC 18 44 16 -73 57.7           ~ 1 0
67 JWT Core 36 PoC 20 39 52 +67 18.7           ~ 1 0
68 JWT Core 37 PoC 20 40 10 +67 05.6           ~ 1 0
69 LDN 1148 DNe 20 40 31.6 +67 21 45           ~ 65 0
70 JWT Core 38 PoC 21 17 03 +66 51.7           ~ 1 0
71 JWT Core 40 PoC 21 17 34 +67 12.1           ~ 1 0
72 JWT Core 39 PoC 21 17 35 +66 42.3           ~ 1 0
73 NAME Cepheus Region reg 21 20 00.0 +72 30 00           ~ 113 0
74 JWT Core 42 PoC 21 20 28 +66 50.2           ~ 1 0
75 JWT Core 43 PoC 21 23 35 +66 34.3           ~ 1 0
76 IRAS 21232+6626 FIR 21 24 13.4 +66 39 45           ~ 1 0
77 JWT Core 41 PoC 21 26 34 -82 36.7           ~ 1 0
78 IRAS 21185-8252 FIR 21 26 42.8 -82 39 30           ~ 1 0
79 JWT Core 44 PoC 21 27 19 +66 43.9           ~ 1 0
80 LDN 1176 DNe 21 31.0 +66 43           ~ 6 0
81 JWT Cloud 2A Cld 21 38 -82.8           ~ 1 0
82 NGC 7129 OpC 21 42 58 +66 06.8     11.5     ~ 260 0
83 JWT Core 46 PoC 21 43 15 +66 07.0           ~ 1 0
84 IRAS 21426+6556 FIR 21 43 49.0 +66 10 39           ~ 3 0
85 NGC 7142 OpC 21 45 09.6 +65 46 55   10.36 9.3     ~ 143 0
86 JWT Core 45 PoC 21 46 20 -82 31.4           ~ 1 0
87 JWT Core 47 PoC 21 48 43 +35 34.0           ~ 1 0
88 JWT Core 48 PoC 21 48 59 +35 15.0           ~ 1 0
89 JWT Core 50 PoC 21 49 39 +35 37.3           ~ 1 0
90 JWT Cloud 334A Cld 21 50 +35.7           ~ 1 0
91 IRAS 21479+3520 * 21 50 06.6200807184 +35 34 08.295922848   11.00 9.34     ~ 1 0
92 IRAS 21484+3522 FIR 21 50 33.78 +35 36 45.2           ~ 1 0
93 DO 20925 * 21 50.9 -35 06           ~ 1 0
94 JWT Core 51 PoC 21 51 03 +36 00.8           ~ 1 0
95 JWT Core 49 PoC 21 54 20 -82 46.1           ~ 1 0
96 NAME Cepheus Cloud SFR 22 00.0 +76 30           ~ 145 0
97 JWT Cloud 422C Cld 22 00 +77.7           ~ 1 0
98 IRAS 21580-8316 FIR 22 05 13.5 -83 02 15           ~ 1 0
99 JWT Core 52 PoC 22 06 02 -82 59.7           ~ 1 0
100 JWT Core 53 PoC 22 06 23 -82 45.5           ~ 1 0
101 JWT Core 54 PoC 22 08 02 +77 36.9           ~ 1 0
102 JWT Core 55 PoC 22 10 14 +77 29.9           ~ 1 0
103 JWT Core 56 PoC 22 22 21 -83 01.6           ~ 1 0
104 JWT Core 57 PoC 22 28 15 -83 08.5           ~ 1 0
105 JWT Core 58 PoC 22 32 38 -83 20.5           ~ 1 0
106 IRAS 22278-8341 FIR 22 34 08.8 -83 26 08           ~ 1 0
107 IRAS 22412+7332 FIR 22 42 33.4 +73 47 47           ~ 1 0
108 JWT Core 59 PoC 22 42 51 +73 49.6           ~ 1 0
109 IRAS 22422+7333 LP* 22 43 34.0179698760 +73 48 56.723506524           ~ 3 0
110 LEE 351 C* 22 43 38.9960548704 +74 47 37.105732896       11.10   N 16 0
111 JWT Cloud 422B Cld 22 46 +73.9           ~ 1 0
112 JWT Core 60 PoC 22 49 23 +73 33.9           ~ 1 0
113 TDS 431 DNe ~ ~           ~ 2 0
114 TDS 426 DNe ~ ~           ~ 2 0
115 TDS 420 DNe ~ ~           ~ 2 0
116 TDS 428 DNe ~ ~           ~ 1 0

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