2018ApJ...864..120M

Query : 2018ApJ...864..120M

2018ApJ...864..120M - Astrophys. J., 864, 120-120 (2018/September-2)

ALMA observations toward the starburst dwarf galaxy NGC 5253. I. Molecular cloud properties and scaling relations.

MIURA R.E., ESPADA D., HIROTA A., NAKANISHI K., BENDO G.J. and SUGAI H.

Abstract (from CDS):

We present high-spatial-resolution (∼0.''2, or ∼3 pc) CO(2-1) observations of the nearest young starburst dwarf galaxy, NGC 5253, taken with the Atacama Large Millimeter/submillimeter Array. We have identified 118 molecular clouds with average values of 4.3 pc in radius and 2.2 km s–1 in velocity dispersion, which comprise the molecular cloud complexes observed previously with ∼100 pc resolution. We derive for the first time in this galaxy the I(CO)-N(H2) conversion factor, X=4.1–2.4+5.9×1020 cm–2(K km s–1)–1, based on the virial method. The line width and mass-to-size relations of the resolved molecular clouds present an offset on average toward higher line widths and masses with respect to quiescent regions in other nearby spiral galaxies and our Galaxy. The offset in the scaling relation reaches its maximum in regions close to the central starburst, where velocity dispersions are ∼0.5 dex higher and gas mass surface densities are as high as ΣH2=103M☉_pc–2. These central clouds are gravitationally bound despite the high internal pressure. A spatial comparison with star clusters found in the literature enables us to identify six clouds that are associated with young star clusters. Furthermore, the star formation efficiencies (SFEs) of some of these clouds exceed those found in star-cluster-forming clouds within our Galaxy. We conclude that once a super star cluster is formed, the parent molecular clouds are rapidly dispersed by the destructive stellar feedback, which results in such a high SFE in the central starburst of NGC 5253.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: dwarf - galaxies: starburst - galaxies: star clusters: individual: NGC 5253

VizieR on-line data: <Available at CDS (J/ApJ/864/120): table3.dat>

Nomenclature: Table 3: [MEH2018] NNN (Nos 1-118).

Simbad objects: 139

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Number of rows : 139
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 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3588 2
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
3 UGCA 116 AGN 05 55 42.645 +03 23 32.23 10.74 11.68 11.46   11.82 ~ 561 0
4 NGC 5235 GiG 13 36 01.4097237048 +06 35 07.242944028   14.9       ~ 35 0
5 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2778 2
6 [MEH2018] 66 MoC 13 39 55.156 -31 38 22.33           ~ 1 0
7 [MEH2018] 22 MoC 13 39 55.289 -31 38 19.73           ~ 1 0
8 [MEH2018] 59 MoC 13 39 55.344 -31 38 23.43           ~ 1 0
9 [MEH2018] 69 MoC 13 39 55.446 -31 38 27.63           ~ 1 0
10 [MEH2018] 6 MoC 13 39 55.469 -31 38 33.63           ~ 1 0
11 [DAZ2013] 9 Cl* 13 39 55.4818 -31 38 23.376           ~ 3 0
12 [MEH2018] 37 MoC 13 39 55.485 -31 38 25.33           ~ 1 0
13 [MEH2018] 7 MoC 13 39 55.493 -31 38 34.83           ~ 1 0
14 [MEH2018] 4 MoC 13 39 55.501 -31 38 32.53           ~ 1 0
15 [MEH2018] 36 MoC 13 39 55.524 -31 38 25.03           ~ 1 0
16 [MEH2018] 2 MoC 13 39 55.548 -31 38 31.33           ~ 1 0
17 [MEH2018] 12 MoC 13 39 55.618 -31 38 31.43           ~ 1 0
18 [MEH2018] 48 MoC 13 39 55.626 -31 38 26.63           ~ 1 0
19 [MEH2018] 34 MoC 13 39 55.657 -31 38 27.83           ~ 1 0
20 [MEH2018] 11 MoC 13 39 55.665 -31 38 36.53           ~ 1 0
21 [MEH2018] 18 MoC 13 39 55.697 -31 38 25.53           ~ 1 0
22 [MEH2018] 30 MoC 13 39 55.697 -31 38 25.03           ~ 1 0
23 [MEH2018] 45 MoC 13 39 55.704 -31 38 24.63           ~ 1 0
24 [MEH2018] 1 MoC 13 39 55.712 -31 38 28.73           ~ 1 0
25 [MEH2018] 17 MoC 13 39 55.728 -31 38 28.43           ~ 1 0
26 [MEH2018] 14 MoC 13 39 55.743 -31 38 25.63           ~ 1 0
27 [MEH2018] 3 MoC 13 39 55.759 -31 38 30.93           ~ 1 0
28 [MEH2018] 62 MoC 13 39 55.767 -31 38 35.13           ~ 1 0
29 [MEH2018] 21 MoC 13 39 55.767 -31 38 26.83           ~ 1 0
30 [MEH2018] 46 MoC 13 39 55.775 -31 38 24.33           ~ 1 0
31 [MTB2002] F MoC 13 39 55.8 -31 38 31           ~ 3 0
32 [MEH2018] 26 MoC 13 39 55.822 -31 38 28.83           ~ 1 0
33 [MEH2018] 15 MoC 13 39 55.830 -31 38 25.43           ~ 1 0
34 [MEH2018] 64 MoC 13 39 55.853 -31 38 25.63           ~ 1 0
35 [CJA2015] 4 Cl* 13 39 55.858 -31 38 27.41           ~ 3 0
36 [MEH2018] 50 MoC 13 39 55.869 -31 38 37.63           ~ 1 0
37 [MEH2018] 52 MoC 13 39 55.869 -31 38 31.13           ~ 1 0
38 [MEH2018] 53 MoC 13 39 55.869 -31 38 26.93           ~ 1 0
39 [MEH2018] 56 MoC 13 39 55.908 -31 38 30.93           ~ 1 0
40 [MEH2018] 25 MoC 13 39 55.908 -31 38 17.63           ~ 1 0
41 [MEH2018] 116 MoC 13 39 55.908 -31 38 35.63           ~ 1 0
42 [CTB2017] D4 MoC 13 39 55.91 -31 38 25.0           ~ 4 0
43 [MEH2018] 67 MoC 13 39 55.924 -31 38 34.23           ~ 1 0
44 [MEH2018] 35 MoC 13 39 55.924 -31 38 26.33           ~ 1 0
45 [DAZ2013] 86 Cl* 13 39 55.9414 -31 38 26.758           ~ 2 0
46 [MEH2018] 5 MoC 13 39 55.947 -31 38 31.33           ~ 1 0
47 [CJA2015] 11 Cl* 13 39 55.951 -31 38 24.45           ~ 8 0
48 [MEH2018] 114 MoC 13 39 55.955 -31 38 37.83           ~ 1 0
49 [MEH2018] 115 MoC 13 39 55.955 -31 38 37.23           ~ 1 0
50 [MEH2018] 113 MoC 13 39 55.963 -31 38 38.53           ~ 1 0
51 [MEH2018] 87 MoC 13 39 55.971 -31 38 37.13           ~ 1 0
52 [MEH2018] 44 MoC 13 39 55.971 -31 38 25.73           ~ 1 0
53 [MEH2018] 19 MoC 13 39 55.978 -31 38 28.13           ~ 1 0
54 [DAZ2013] 129 Cl* 13 39 55.98 -31 38 31.9           ~ 23 0
55 [MEH2018] 75 MoC 13 39 55.986 -31 38 26.73           ~ 1 0
56 [MEH2018] 55 MoC 13 39 55.986 -31 38 26.33           ~ 1 0
57 NGC 5253 rG 13 39 55.990 -31 38 24.11 11.48 10.94 10.49 10.33 13.47 ~ 1421 4
58 [MEH2018] 112 MoC 13 39 55.994 -31 38 38.63           ~ 1 0
59 [MEH2018] 28 MoC 13 39 55.994 -31 38 27.63           ~ 1 0
60 [MTB2002] D MoC 13 39 56.0 -31 38 26           ~ 10 0
61 [MEH2018] 63 MoC 13 39 56.002 -31 38 34.73           ~ 1 0
62 [CTB2017] D7 MoC 13 39 56.002 -31 38 26.93           ~ 2 0
63 NAME NGC 5353 Radio Supernebula Cl* 13 39 56.007 -31 38 25.00           ~ 51 0
64 [HCG2004] NGC 5253 C 8 Cl* 13 39 56.0169 -31 38 27.422           ~ 6 0
65 [DAZ2013] 125 Cl* 13 39 56.0172 -31 38 31.178           ~ 2 0
66 [DAZ2013] 127 Cl* 13 39 56.0200 -31 38 31.361           ~ 2 0
67 [MEH2018] 58 MoC 13 39 56.025 -31 38 25.83           ~ 1 0
68 [CTB2017] D3 MoC 13 39 56.03 -31 38 22.9           ~ 2 0
69 [MEH2018] 13 MoC 13 39 56.033 -31 38 38.53           ~ 1 0
70 [MEH2018] 86 MoC 13 39 56.041 -31 38 37.93           ~ 1 0
71 [MEH2018] 94 MoC 13 39 56.049 -31 38 38.53           ~ 1 0
72 [MEH2018] 65 MoC 13 39 56.057 -31 38 23.63           ~ 1 0
73 [MEH2018] 27 MoC 13 39 56.064 -31 38 26.33           ~ 1 0
74 [MEH2018] 117 MoC 13 39 56.064 -31 38 39.63           ~ 1 0
75 [MEH2018] 41 MoC 13 39 56.096 -31 38 26.93           ~ 1 0
76 [MEH2018] 43 MoC 13 39 56.096 -31 38 21.03           ~ 1 0
77 [MEH2018] 31 MoC 13 39 56.135 -31 38 23.03           ~ 1 0
78 [MEH2018] 42 MoC 13 39 56.151 -31 38 25.53           ~ 1 0
79 [DAZ2013] 105 Cl* 13 39 56.1723 -31 38 23.075           ~ 4 0
80 [MEH2018] 90 MoC 13 39 56.190 -31 38 31.63           ~ 1 0
81 [MEH2018] 49 MoC 13 39 56.190 -31 38 25.03           ~ 1 0
82 [MEH2018] 54 MoC 13 39 56.221 -31 38 26.63           ~ 1 0
83 [MEH2018] 38 MoC 13 39 56.221 -31 38 23.93           ~ 1 0
84 [MEH2018] 57 MoC 13 39 56.237 -31 38 26.33           ~ 1 0
85 [MEH2018] 105 MoC 13 39 56.252 -31 38 32.23           ~ 1 0
86 [MEH2018] 118 MoC 13 39 56.276 -31 38 32.23           ~ 1 0
87 [MEH2018] 61 MoC 13 39 56.276 -31 38 25.83           ~ 1 0
88 [MEH2018] 111 MoC 13 39 56.299 -31 38 30.23           ~ 1 0
89 [MEH2018] 85 MoC 13 39 56.315 -31 38 30.83           ~ 1 0
90 [MEH2018] 106 MoC 13 39 56.354 -31 38 36.93           ~ 1 0
91 [MEH2018] 107 MoC 13 39 56.378 -31 38 35.53           ~ 1 0
92 [MEH2018] 84 MoC 13 39 56.378 -31 38 32.63           ~ 1 0
93 [MEH2018] 73 MoC 13 39 56.417 -31 38 38.73           ~ 1 0
94 [MEH2018] 20 MoC 13 39 56.433 -31 38 36.43           ~ 1 0
95 [MEH2018] 100 MoC 13 39 56.433 -31 38 34.63           ~ 1 0
96 [MEH2018] 74 MoC 13 39 56.456 -31 38 38.83           ~ 1 0
97 [MEH2018] 71 MoC 13 39 56.456 -31 38 36.63           ~ 1 0
98 [MEH2018] 10 MoC 13 39 56.479 -31 38 22.93           ~ 1 0
99 [MEH2018] 92 MoC 13 39 56.503 -31 38 33.63           ~ 1 0
100 [MEH2018] 33 MoC 13 39 56.511 -31 38 20.23           ~ 1 0
101 [MEH2018] 24 MoC 13 39 56.519 -31 38 19.03           ~ 1 0
102 [MEH2018] 108 MoC 13 39 56.534 -31 38 35.13           ~ 1 0
103 [MEH2018] 40 MoC 13 39 56.542 -31 38 22.13           ~ 1 0
104 [MEH2018] 23 MoC 13 39 56.542 -31 38 19.33           ~ 1 0
105 [MEH2018] 39 MoC 13 39 56.550 -31 38 21.83           ~ 1 0
106 [MEH2018] 110 MoC 13 39 56.574 -31 38 32.93           ~ 1 0
107 [MEH2018] 109 MoC 13 39 56.589 -31 38 34.93           ~ 1 0
108 [MEH2018] 81 MoC 13 39 56.597 -31 38 32.03           ~ 1 0
109 [MTB2002] C MoC 13 39 56.6 -31 38 32           ~ 4 0
110 [MEH2018] 104 MoC 13 39 56.652 -31 38 33.83           ~ 1 0
111 [MEH2018] 82 MoC 13 39 56.652 -31 38 31.93           ~ 1 0
112 [MEH2018] 101 MoC 13 39 56.667 -31 38 35.43           ~ 1 0
113 [MEH2018] 9 MoC 13 39 56.691 -31 38 30.23           ~ 1 0
114 [MEH2018] 91 MoC 13 39 56.699 -31 38 35.23           ~ 1 0
115 [MEH2018] 16 MoC 13 39 56.722 -31 38 29.63           ~ 1 0
116 [MEH2018] 98 MoC 13 39 56.738 -31 38 35.73           ~ 1 0
117 [MEH2018] 80 MoC 13 39 56.746 -31 38 35.03           ~ 1 0
118 [MEH2018] 77 MoC 13 39 56.816 -31 38 35.33           ~ 1 0
119 [MEH2018] 72 MoC 13 39 56.824 -31 38 33.93           ~ 1 0
120 [MEH2018] 79 MoC 13 39 56.824 -31 38 31.83           ~ 1 0
121 [MEH2018] 97 MoC 13 39 56.824 -31 38 35.83           ~ 1 0
122 [MEH2018] 76 MoC 13 39 56.840 -31 38 35.73           ~ 1 0
123 [MEH2018] 93 MoC 13 39 56.863 -31 38 40.63           ~ 1 0
124 [MEH2018] 89 MoC 13 39 56.879 -31 38 35.83           ~ 1 0
125 [MEH2018] 88 MoC 13 39 56.895 -31 38 36.13           ~ 1 0
126 [MEH2018] 103 MoC 13 39 56.895 -31 38 34.13           ~ 1 0
127 [MEH2018] 70 MoC 13 39 56.910 -31 38 36.33           ~ 1 0
128 [MEH2018] 99 MoC 13 39 56.918 -31 38 35.43           ~ 1 0
129 [MEH2018] 83 MoC 13 39 56.996 -31 38 35.93           ~ 1 0
130 [MEH2018] 78 MoC 13 39 57.012 -31 38 32.53           ~ 1 0
131 [MEH2018] 96 MoC 13 39 57.176 -31 38 36.63           ~ 1 0
132 [MEH2018] 95 MoC 13 39 57.208 -31 38 36.93           ~ 1 0
133 [MEH2018] 68 MoC 13 39 57.263 -31 38 33.73           ~ 1 0
134 [MEH2018] 102 MoC 13 39 57.310 -31 38 35.43           ~ 1 0
135 [MEH2018] 51 MoC 13 39 57.466 -31 38 35.53           ~ 1 0
136 [MEH2018] 60 MoC 13 39 57.498 -31 38 36.43           ~ 1 0
137 [MEH2018] 47 MoC 13 39 57.599 -31 38 36.23           ~ 1 0
138 QSO B1424-41 Bla 14 27 56.29756617 -42 06 19.4376238   18.48 17.7 16.30   ~ 547 1
139 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0

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