2014ApJ...797...40Y

Query : 2014ApJ...797...40Y

2014ApJ...797...40Y - Astrophys. J., 797, 40 (2014/December-2)

Expanding shell and star formation in the infrared dust bubble N6.

YUAN J.-H., WU Y., LI J.Z. and LIU H.

Abstract (from CDS):

We have carried out a multiwavelength study of the infrared dust bubble N6 to extensively investigate the molecular environs and star-forming activities therein. Mapping observations in 12CO J = 1-0 and 13CO J = 1-0 performed with the Purple Mountain Observatory 13.7 m telescope have revealed four velocity components. Comparison between distributions of each component and the infrared emission suggests that three components are correlated with N6. There are 10 molecular clumps detected. Among them, five have reliable detections in both 12CO and 13CO and have similar LTE and non-LTE masses ranging from 200 to higher than 5000 M☉. With larger gas masses than virial masses, these five clumps are gravitationally unstable and have the potential to collapse to form new stars. The other five clumps are only reliably detected in 12CO and have relatively small masses. Five clumps are located on the border of the ring structure, and four of them are elongated along the shell. This is well in agreement with the collect-and-collapse scenario. The detected velocity gradient reveals that the ring structure is still under expansion owing to stellar winds from the exciting star(s). Furthermore, 99 young stellar objects (YSOs) have been identified based on their infrared colors. A group of YSOs reside inside the ring, indicating active star formation in N6. Although no confirmative features of triggered star formation are detected, the bubble and the enclosed H II region have profoundly reconstructed the natal cloud and altered the dynamics therein.

Abstract Copyright: ∼

Journal keyword(s): H II regions - ISM: bubbles - ISM: clouds - radio lines: ISM - stars: early-type - stars: formation

VizieR on-line data: <Available at CDS (J/ApJ/797/40): table5.dat table6.dat table7.dat>

Nomenclature: Figs 4-5, Tables 1-2: [YWL2014] A (Nos A-J).

Simbad objects: 115

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Number of rows : 115
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 NAME Expanding Shell PoC 17 46.5 -28 46           ~ 19 0
2 2MASS J18134493-1818142 Y*? 18 13 44.9330761824 -18 18 14.167303740           ~ 2 0
3 2MASS J18134504-1816598 Y*? 18 13 45.041 -18 16 59.83           ~ 3 0
4 IRAS 18108-1821 Y*? 18 13 45.388 -18 20 58.70           ~ 4 0
5 2MASS J18135052-1825316 Y*? 18 13 50.5208033448 -18 25 30.901826316           ~ 2 0
6 SSTGLMC G012.1558-00.4524 Y*? 18 13 51.233 -18 37 10.83           ~ 1 0
7 2MASS J18135218-1830190 AB? 18 13 52.182 -18 30 19.03           ~ 3 0
8 2MASS J18135454-1813514 Y*O 18 13 54.546 -18 13 51.43           ~ 3 0
9 2MASS J18135484-1826063 Y*? 18 13 54.8442658296 -18 26 06.273513780           ~ 1 0
10 SPICY 77281 Y*O 18 13 55.05 -18 11 37.5           ~ 4 0
11 SPICY 77282 Y*? 18 13 55.221 -18 24 52.97           ~ 2 0
12 2MASS J18135568-1833577 Y*? 18 13 55.6786075176 -18 33 57.711160080           ~ 2 0
13 SSTGLMC G012.2552-00.4189 Y*? 18 13 55.827 -18 30 58.78           ~ 1 0
14 SSTGLMC G012.2518-00.4213 Y*? 18 13 55.941 -18 31 13.81           ~ 1 0
15 ISOGAL-P J181356.9-182107 Y*? 18 13 57.026 -18 21 10.78           ~ 4 0
16 SSTGLMC G012.5196-00.2805 Y*? 18 13 57.083 -18 13 04.66           ~ 1 0
17 2MASS J18135768-1818404 Y*? 18 13 57.682 -18 18 40.45           ~ 1 0
18 2MASS J18135787-1814233 Y*? 18 13 57.877 -18 14 23.32           ~ 3 0
19 2MASS J18135824-1812114 Y*? 18 13 58.2494493432 -18 12 11.188631772           ~ 2 0
20 2MASS J18135920-1829047 Y*? 18 13 59.202 -18 29 04.74           ~ 1 0
21 SSTGLMC G012.5211-00.2903 Y*? 18 13 59.434 -18 13 16.61           ~ 1 0
22 2MASS J18135968-1812414 Y*? 18 13 59.682 -18 12 41.44           ~ 2 0
23 2MASS J18140031-1829394 Y*? 18 14 00.3235403472 -18 29 39.357115512           ~ 2 0
24 SPICY 77347 Y*? 18 14 00.702 -18 12 27.89           ~ 2 0
25 2MASS J18140120-1818342 Y*? 18 14 01.207 -18 18 34.21           ~ 2 0
26 SSTGLMC G012.4304-00.3739 Y*? 18 14 07.020 -18 20 27.53           ~ 1 0
27 SSTGLMC G012.3338-00.4337 Y*? 18 14 08.634 -18 27 15.83           ~ 1 0
28 2MASS J18141059-1837190 AB? 18 14 10.5493289592 -18 37 18.711795576           ~ 2 0
29 SPICY 77434 Y*? 18 14 11.560 -18 12 24.53           ~ 3 0
30 SSTGLMC G012.4389-00.3958 Y*? 18 14 12.932 -18 20 38.39           ~ 1 0
31 2MASS J18141323-1818464 Y*? 18 14 13.237 -18 18 46.45           ~ 1 0
32 SPICY 77450 Y*? 18 14 13.504 -18 17 30.60           ~ 2 0
33 SPICY 77458 Y*? 18 14 14.526 -18 23 10.42           ~ 3 0
34 2MASS J18141534-1832024 Y*? 18 14 15.348 -18 32 02.44           ~ 1 0
35 SPICY 77463 Y*? 18 14 15.430 -18 13 03.35           ~ 2 0
36 SPICY 77464 Y*? 18 14 15.478 -18 13 40.22           ~ 2 0
37 2MASS J18141635-1827336 Y*? 18 14 16.358 -18 27 33.67           ~ 3 0
38 SSTGLMC G012.4878-00.3868 Y*? 18 14 16.833 -18 17 48.20           ~ 1 0
39 SPICY 77482 Y*? 18 14 17.152 -18 13 08.31           ~ 3 0
40 2MASS J18141839-1814519 EB* 18 14 18.3890184216 -18 14 51.221709492           ~ 3 0
41 2MASS J18142116-1819176 Y*? 18 14 21.161 -18 19 17.62           ~ 3 0
42 2MASS J18142306-1824084 Y*? 18 14 23.066 -18 24 08.49           ~ 3 0
43 IRAS 18114-1817 * 18 14 23.52288 -18 16 28.9416           ~ 2 0
44 IRAS 18114-1828 * 18 14 23.81472 -18 27 56.9952           ~ 2 0
45 IRAS 18114-1825 cor 18 14 24.1884 -18 24 32.073           ~ 27 0
46 2MASS J18142457-1824421 Y*? 18 14 24.575 -18 24 42.19           ~ 4 0
47 SPICY 77590 Y*? 18 14 27.778 -18 12 01.46           ~ 2 0
48 2MASS J18143129-1812164 Y*? 18 14 31.292 -18 12 16.41           ~ 3 0
49 2MASS J18143190-1831005 Y*? 18 14 31.910 -18 31 00.53           ~ 3 0
50 2MASS J18143635-1831072 Y*? 18 14 36.3455028792 -18 31 07.191542172           ~ 1 0
51 2MASS J18143640-1828192 Y*? 18 14 36.4089931344 -18 28 19.180255080           ~ 1 0
52 SSTGLMC G012.3714-00.5470 Y*? 18 14 38.367 -18 28 31.88           ~ 1 0
53 SPICY 77803 Y*? 18 14 41.008 -18 21 23.27           ~ 2 0
54 SDC G12.419-0.536 DNe 18 14 41.76 -18 25 41.4           ~ 3 0
55 2MASS J18144260-1822444 Y*? 18 14 42.5961752256 -18 22 44.486144832           ~ 3 0
56 2MASS J18144440-1815285 Y*? 18 14 44.400 -18 15 28.55           ~ 1 0
57 2MASS J18144479-1821565 Y*? 18 14 44.7855433152 -18 21 56.564522748           ~ 3 0
58 2MASS J18144610-1821390 Y*? 18 14 46.1062622856 -18 21 39.099138660           ~ 2 0
59 2MASS J18144626-1834549 Y*? 18 14 46.2559643352 -18 34 54.939329832           ~ 2 0
60 SPICY 77888 Y*? 18 14 47.694 -18 18 57.95           ~ 2 0
61 2MASS J18144804-1824117 Y*? 18 14 48.0545832552 -18 24 11.839188672           ~ 2 0
62 ASAS J181448-1840.3 Y*? 18 14 48.2034062630 -18 40 22.073334768           F0I 4 0
63 2MASS J18144851-1824043 Y*? 18 14 48.519 -18 24 04.38           ~ 2 0
64 IRAS 18118-1828 IR 18 14 48.7 -18 27 16           ~ 2 0
65 SSTGLMC G012.5144-00.5276 Y*? 18 14 51.2504977104 -18 20 26.066592564           ~ 1 0
66 2MASS J18145162-1822242 Y*? 18 14 51.6197240256 -18 22 24.331209960           ~ 2 0
67 2MASS J18145247-1821062 Y*? 18 14 52.476 -18 21 06.23           ~ 2 0
68 SPICY 77969 Y*? 18 14 53.425 -18 22 15.94           ~ 2 0
69 2MASS J18145523-1822586 Y*? 18 14 55.239 -18 22 58.68           ~ 2 0
70 2MASS J18145704-1821478 Y*? 18 14 57.0579516528 -18 21 48.064855356           ~ 2 0
71 IRAS 18120-1834 IR 18 14 59.0 -18 33 27           ~ 2 0
72 2MASS J18150218-1820387 Y*? 18 15 02.1766890792 -18 20 38.860924200           ~ 1 0
73 2MASS J18150241-1818435 Y*? 18 15 02.414 -18 18 43.58           ~ 1 0
74 SSTGLMC G012.4972-00.5914 Y*? 18 15 03.407 -18 23 10.24           ~ 1 0
75 SSTGLMC G012.3957-00.6496 AB? 18 15 04.114 -18 30 11.52           ~ 3 0
76 IRAS 18121-1825 AB? 18 15 04.3741246776 -18 24 07.925705892       15.961   ~ 5 0
77 [ABB2014] WISE G012.523-00.611 bub 18 15 04.8 -18 22 24           ~ 14 0
78 2MASS J18150520-1821597 AB? 18 15 05.2049502626 -18 21 59.845224469           ~ 3 0
79 2MASS J18150541-1811521 Y*? 18 15 05.418 -18 11 52.13           ~ 1 0
80 2MASS J18150562-1825543 Y*? 18 15 05.5983086256 -18 25 54.304709520           ~ 1 0
81 2MASS J18150584-1837537 Y*? 18 15 05.846 -18 37 53.75           ~ 1 0
82 2MASS J18150900-1832259 Y*? 18 15 09.005 -18 32 25.96           ~ 1 0
83 IRAS 18122-1818 * 18 15 10.27080 -18 17 32.1936           ~ 6 0
84 SSTGLMC G012.2724-00.7510 Y*? 18 15 11.773 -18 39 35.50           ~ 1 0
85 2MASS J18151180-1832538 Y*? 18 15 11.805 -18 32 53.86           ~ 2 0
86 2MASS J18151555-1838132 Y*? 18 15 15.558 -18 38 13.23           ~ 2 0
87 IRAS 18123-1829 FIR 18 15 18.5 -18 28 47           ~ 2 0
88 SSTGLMC G012.6706-00.5677 Y*? 18 15 19.062 -18 13 20.82           ~ 1 0
89 SSTGLMC G012.4156-00.7077 Y*? 18 15 19.433 -18 30 47.96           ~ 1 0
90 2MASS J18152115-1827466 Y*? 18 15 21.1732673880 -18 27 46.384528860           ~ 1 0
91 2MASS J18152150-1813587 Y*? 18 15 21.503 -18 13 58.76           ~ 1 0
92 2MASS J18152229-1823520 Y*? 18 15 22.2958092120 -18 23 51.989030124           ~ 1 0
93 IRAS 18126-1820 Y*? 18 15 28.96416 -18 19 14.3760           ~ 4 0
94 SPICY 78208 Y*? 18 15 29.917 -18 35 33.62           ~ 2 0
95 SSTGLMC G012.7171-00.5947 Y*? 18 15 30.651 -18 11 40.11           ~ 1 0
96 2MASS J18153087-1817414 Y*? 18 15 30.8759362944 -18 17 41.583226740           ~ 2 0
97 2MASS J18153382-1838538 Y*? 18 15 33.8187319896 -18 38 53.775206196           ~ 1 0
98 2MASS J18153613-1812096 AB? 18 15 36.1306753176 -18 12 09.527353992           ~ 3 0
99 2MASS J18153688-1817285 AB? 18 15 36.885 -18 17 28.53           ~ 3 0
100 2MASS J18153976-1813359 Y*? 18 15 39.769 -18 13 35.91           ~ 1 0
101 SPICY 78326 Y*? 18 15 40.858 -18 34 57.91           ~ 2 0
102 SSTGLMC G012.4008-00.8152 AB? 18 15 41.579 -18 34 39.42           ~ 3 0
103 2MASS J18154167-1824247 AB? 18 15 41.676 -18 24 24.71           ~ 2 0
104 2MASS J18154257-1834161 AB? 18 15 42.580 -18 34 16.11           ~ 3 0
105 SPICY 78352 Y*? 18 15 43.134 -18 21 18.57           ~ 2 0
106 SPICY 78362 Y*? 18 15 44.539 -18 19 44.43           ~ 2 0
107 2MASS J18154535-1811585 Y*? 18 15 45.3508924248 -18 11 58.455258720           ~ 2 0
108 SPICY 78375 Y*? 18 15 46.087 -18 20 07.84           ~ 2 0
109 SSTGLMC G012.6303-00.7119 Y*? 18 15 46.256 -18 19 35.70           ~ 1 0
110 SPICY 78382 Y*? 18 15 47.526 -18 30 29.80           ~ 2 0
111 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
112 NAME Sgr Arm PoG 19 00 -30.0           ~ 710 1
113 W 51 SNR 19 23 50 +14 06.0           ~ 1352 1
114 LBN 063.10+00.46 HII 19 49 11.7 +26 51 36   14.60 13.63     ~ 55 0
115 NAME Scutum Spiral Arm PoG ~ ~           ~ 393 0

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