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Home All issues Volume 684 (April 2024) A&A, 684 (2024) A142 Full HTML
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Table 6

Properties of MDCs with NH3 detection.

MDC IR-class Morph(a) NH3(b) Rsel(c) Msel(d) συ συ,NT συ,ng Tdust(e) Tgas αvir 𝓜nt 𝓜ng NH2(f)
(pc) (M⊙) (km s−1) (km s−1) (km s−1) (K) (K) (1022 cm−2)
220 IR-quiet Ml N 0.082 75.1 0.61 0.52 0.47 17.8 27.3 0.5 1.7 1.5 15.8
274 IR-bright M2 N 0.122 59.4 0.97 0.93 0.76 21.3 19.0 2.2 3.6 2.9 5.7
584 IR-quiet Ml N 0.055 7.4 0.34 0.23 0.23 20.3 17.4 1.0 0.9 0.9 3.5
725 IR-bright M2 F 0.133 147.6 0.91 0.87 0.74 24.0 21.3 0.9 3.2 2.7 11.8
248 IR-quiet Ml F 0.117 202.1 1.06 1.01 0.99 18.2 26.2 0.8 3.3 3.3 21.0
774 Starless Ml F 0.098 25.0 0.53 0.46 0.45 16.4 18.9 1.3 1.8 1.7 3.7
714 IR-bright Ml N 0.059 20.5 1.37 1.35 1.23 22.7 24.8 6.3 4.5 4.1 8.3
1267 IR-quiet Ml F 0.155 202.5 0.44 0.37 0.31 15.3 14.7 0.2 1.6 1.4 12.0
3188 IR-quiet Ml N 0.067 17.9 0.27 0.39 0.31 16.3 14.1 0.3 1.7 1.4 5.7
698 IR-quiet Ml F 0.103 81.1 0.89 0.85 0.75 17.0 20.2 1.2 3.2 2.8 10.9
1179 IR-quiet Ml F 0.123 35.9 0.78 0.73 0.55 16.0 17.5 2.4 2.9 2.2 3.4
532 IR-quiet M2 N 0.055 10.5 0.41 0.30 0.28 23.2 21.4 1.0 1.1 1.0 4.9
801 IR-quiet M2 N 0.117 76.3 0.55 0.48 0.45 17.8 18.4 0.5 1.9 1.7 7.9
684 IR-quiet Ml F 0.117 109.5 0.64 0.59 0.54 17.6 19.3 0.5 2.3 2.1 11.4
327 IR-quiet Ml N 0.097 47.1 0.35 0.26 0.25 20.9 16.4 0.3 1.1 1.0 7.1
619 Starless Ml N 0.057 13.7 0.45 0.36 0.31 22.2 20.3 1.0 1.3 1.1 6.0
742 IR-quiet M2 N 0.077 21.4 0.50 0.42 0.35 27.0 24.9 1.0 1.4 1.2 5.1
310 IR-quiet Ml N 0.063 20.0 0.66 0.60 0.60 20.5 18.0 1.6 2.4 2.4 7.1
507 IR-quiet Ml F 0.138 372.5 0.68 0.63 0.61 21.4 21.2 0.2 2.3 2.2 27.8
753 IR-quiet Ml F 0.128 189.5 0.87 0.83 0.65 17.8 23.0 0.6 2.9 2.3 16.4
798 IR-quiet Ml F 0.137 89.3 0.52 0.46 0.43 19.2 17.6 0.5 1.8 1.7 6.8
874 IR-quiet Ml F 0.152 211.0 0.61 0.55 0.40 17.9 15.9 0.3 2.3 1.7 13.0
1537 IR-quiet Ml N 0.099 44.7 0.67 0.62 0.58 25.3 23.7 1.2 2.1 2.0 6.5
723 IR-quiet Ml N 0.087 33.9 0.66 0.62 0.57 16.0 14.5 1.3 2.7 2.5 6.4
509 IR-quiet M2 F 0.155 300.6 0.72 0.67 0.64 18.2 18.9 0.3 2.6 2.4 17.8
351 IR-quiet Ml N 0.081 35.0 0.69 0.64 0.49 18.3 18.2 1.3 2.5 1.9 7.6
1225 IR-quiet Ml N 0.131 83.6 0.66 0.62 0.43 14.3 12.3 0.8 3.0 2.1 6.9
1454 IR-quiet M2 N 0.158 142.7 0.59 0.52 0.37 16.2 17.4 0.4 2.1 1.5 8.1
892 IR-quiet Ml N 0.038 3.9 0.37 0.18 0.18 31.6 29.6 1.5 0.6 0.5 3.9
540 IR-quiet Ml F 0.159 240.8 0.63 0.58 0.47 15.5 16.3 0.3 2.4 1.9 13.5
302 IR-quiet M2 N 0.08 18.1 0.48 0.39 0.35 22.3 20.3 1.2 1.5 1.3 4.0
520 IR-quiet Ml N 0.057 8.9 0.36 0.24 0.20 23.4 18.3 1.0 0.9 0.8 3.9
340 IR-quiet Ml F 0.139 119.3 0.57 0.52 0.47 16.1 15.0 0.4 2.3 2.0 8.8
214 IR-quiet Ml N 0.084 53.4 0.84 0.78 0.77 21.2 27.2 1.3 2.5 2.5 10.7
247 IR-quiet Ml N 0.092 41.3 0.56 0.46 0.41 21.3 20.1 0.8 1.7 1.5 6.9

Notes. (a)The morphology of NH3. MDCs at the M3 stage are not listed because of their nondetection. (b)Distribution of NH3 within MDCs. “F” for NH3 emission covering almost the whole spatial extent of MDCs and “N” for NH3 emission only covering part of the spatial extent of MDCs. (c)The effective radii of selected regions. (d)The mass of selected regions. (e)Refer to Cao et al. (2021). (ƒ)Measured from the N-map in Cao et al. (2019).

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