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Home All issues Volume 505 / No 1 (October I 2009) A&A, 505 1 (2009) 405-415 Full HTML
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Table 1:

Properties of the first 30 out of the 11303 in the Spitzer dark cloud (SDC) catalogue. The full catalogue is available at the CDS.
Number Name Coordinates $I_{\rm {min}}$ $I_{\rm {MIR}}$ $\delta I_{\rm {MIR}}$ $\Delta X$ $\Delta Y$ $\alpha$ $R_{\rm eq}$ $\tau_{\rm {peak}}$ $\tau_{\rm {av}}$ $\tau_{\rm {sat}}$ Frag Star $\sigma_{\rm {star}}$
    RA(J2000) Dec(J2000) (MJy/sr) (MJy/sr)   ( $^{\prime\prime}$) ( $^{\prime\prime}$) ($^\circ$) ( $^{\prime\prime}$)         Field IRDC (arcmin-2)
1 SDC9.22+0.169 18:05:30.40 -20:53:16.0 37.9 55.7 0.07 30.0 20.8 76 22.6 1.16 0.50 4.45 2 y y 0.92
2 SDC9.25+0.144 18:05:39.69 -20:52:25.6 40.8 56.9 0.04 18.8 14.4 -66 16.8 0.95 0.48 4.47 1 y n 0.95
3 SDC9.256+0.133 18:05:42.92 -20:52:27.8 41.7 56.7 0.01 9.3 7.4 -42 9.1 0.85 0.48 4.47 1 n n 1.33
4 SDC9.301+0.126 18:05:50.01 -20:50:16.8 43.0 56.7 0.00 11.9 4.8 -89 8.4 0.75 0.45 4.47 1 n n 1.34
5 SDC9.328+0.031 18:06:14.76 -20:51:39.7 46.2 60.8 0.02 7.8 6.9 87 7.9 0.74 0.47 4.53 1 y n 1.14
6 SDC9.403+0.26 18:05:33.02 -20:41:00.7 33.7 44.5 0.02 7.5 4.9 -87 6.8 0.75 0.44 4.22 1 y n 0.93
7 SDC9.432+0.163 18:05:58.31 -20:42:21.8 38.7 51.4 0.03 9.2 5.8 -50 8.1 0.76 0.44 4.37 1 n n 1.02
8 SDC9.461+0.138 18:06:07.50 -20:41:32.8 40.0 53.0 0.03 12.1 4.7 22 8.1 0.77 0.42 4.40 1 n n 1.08
9 SDC9.624+0.187 18:06:16.80 -20:31:35.6 37.7 53.5 1.58 227.3 144.0 -75 133.4 4.30 0.61 4.41 6 y y 0.78
10 SDC9.629-0.061 18:07:13.25 -20:38:38.7 38.0 51.7 0.03 15.9 11.1 30 12.5 0.85 0.45 4.37 1 y n 0.94
11 SDC9.635+0.296 18:05:53.87 -20:27:49.8 24.1 39.7 0.08 20.6 10.5 -60 15.0 1.96 0.58 4.11 1 y n 0.76
12 SDC9.689+0.000 18:07:06.92 -20:33:41.5 39.6 52.9 0.01 17.2 8.2 57 11.1 0.79 0.46 4.40 1 n n 1.01
13 SDC9.692-0.55 18:09:10.79 -20:49:34.6 27.2 35.3 0.02 12.8 4.7 -69 8.7 0.69 0.41 3.99 1 n n 0.94
14 SDC9.737-0.239 18:08:06.57 -20:38:08.1 37.9 52.1 0.05 21.2 8.7 4 14.1 0.91 0.48 4.38 1 n n 0.97
15 SDC9.762-0.567 18:09:23.29 -20:46:20.9 26.6 37.3 0.01 8.2 5.1 -48 7.2 0.98 0.51 4.05 1 y y 0.79
16 SDC9.787-0.156 18:07:54.17 -20:33:06.8 40.1 61.2 0.06 41.1 18.4 -26 26.0 1.38 0.57 4.54 2 y n 1.13
17 SDC9.796-0.028 18:07:26.89 -20:28:53.3 43.5 59.8 0.04 25.6 12.4 -1 18.0 0.92 0.50 4.52 1 n n 1.25
18 SDC9.798-0.707 18:09:59.42 -20:48:32.9 29.1 40.5 0.36 44.8 32.1 2 33.4 0.90 0.47 4.13 1 y n 0.72
19 SDC9.819-0.141 18:07:54.93 -20:31:00.7 44.8 62.2 0.02 27.1 8.7 37 14.0 0.95 0.44 4.56 1 y n 1.25
20 SDC9.825-0.03 18:07:30.72 -20:27:26.0 41.0 58.3 0.08 55.5 14.0 78 23.0 1.02 0.47 4.49 2 y n 1.16
21 SDC9.844+0.752 18:04:38.31 -20:03:31.4 23.1 30.8 0.05 16.8 9.5 -52 11.8 0.76 0.43 3.86 1 y n 0.56
22 SDC9.845-0.138 18:07:57.47 -20:29:34.3 37.0 63.5 0.05 47.7 24.7 0 26.4 2.28 0.51 4.58 2 y n 1.16
23 SDC9.852-0.034 18:07:35.07 -20:26:07.8 30.5 59.3 0.17 84.0 39.1 -73 53.8 4.95 0.87 4.51 12 y y 1.19
24 SDC9.859-0.746 18:10:15.75 -20:46:27.5 33.1 61.3 1.94 208.0 106.2 -7 115.0 3.08 0.79 4.54 4 y y 0.63
25 SDC9.864-0.102 18:07:51.78 -20:27:30.2 49.1 64.5 0.02 24.4 12.0 84 16.2 0.74 0.44 4.59 1 y n 1.18
26 SDC9.872-0.767 18:10:22.02 -20:46:23.9 42.5 69.3 1.51 127.6 80.3 -66 89.3 2.29 0.79 4.67 2 y n 0.55
27 SDC9.878-0.11 18:07:55.37 -20:26:58.8 35.5 65.7 0.07 41.6 28.7 26 34.6 4.98 0.83 4.61 4 y y 1.18
28 SDC9.889-0.747 18:10:19.58 -20:44:56.8 61.7 99.2 0.20 18.4 16.2 -16 17.3 2.01 0.92 5.02 1 n n 0.59
29 SDC9.895-0.749 18:10:20.74 -20:44:41.4 73.5 105.0 0.04 8.5 4.3 18 6.7 1.07 0.54 5.08 1 n n 0.57
30 SDC9.904-0.699 18:10:10.70 -20:42:43.9 58.7 78.9 0.38 27.5 13.4 43 18.7 0.73 0.47 4.80 1 n n 0.49
The columns give a running number (1), the name of the source based in its Galactic coordinates (2), the right ascension and declination (in J2000) of the cloud peak (3,4), the minimum 8 $\mu $m emission towards the cloud ( $I_{\rm {min}}$) (5), the 8 $\mu $m emission ( $I_{\rm {MIR}}$) (6), the maximum $I_{\rm {MIR}}$ variation within the IRDC ( $\delta I_{\rm {MIR}}$, Sect. 3.3) (7), the size of the cloud along its major and minor axes in arcseconds (8,9), the position angle of the major axis of the cloud in degrees East of North (10), the equivalent radius ( $R_{\rm eq}$; Sect. 5.1) of the cloud (11), the peak and average optical depth of the cloud at 8 $\mu $m (12,13), the optical depth at 8 $\mu $m at which the absorption would be saturated (14), the number of fragments in the cloud identified with $\tau _{\rm {step}}=0.35$ (15; Sect. 5.2), whether there are 24 $\mu $m stars in the field (16) and in the cloud (17; Sect. 5.3); and the density of stars around the cloud (18).

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