2012ApJ...751...68L

Query : 2012ApJ...751...68L

2012ApJ...751...68L - Astrophys. J., 751, 68 (2012/May-3)

Triggered star formation surrounding Wolf-Rayet star HD 211853.

LIU T., WU Y., ZHANG H. and QIN S.-L.

Abstract (from CDS):

The environment surrounding Wolf-Rayet (W-R) star HD 211853 is studied in molecular, infrared, as well as radio, and H I emission. The molecular ring consists of well-separated cores, which have a volume density of 103/cm3 and kinematic temperature ∼20 K. Most of the cores are under gravitational collapse due to external pressure from the surrounding ionized gas. From the spectral energy distribution modeling toward the young stellar objects, the sequential star formation is revealed on a large scale in space spreading from the W-R star to the molecular ring. A small-scale sequential star formation is revealed toward core "A," which harbors a very young star cluster. Triggered star formations are thus suggested. The presence of the photodissociation region, the fragmentation of the molecular ring, the collapse of the cores, and the large-scale sequential star formation indicate that the "collect and collapse" process functions in this region. The star-forming activities in core "A" seem to be affected by the "radiation-driven implosion" process.

Abstract Copyright: ∼

Journal keyword(s): ISM: bubbles - ISM: molecules - stars: formation - stars: Wolf-Rayet

Nomenclature: Table 1: [[LWZ2012] A N=9 (Nos A-I), Table 4: [LWZ2012] YNN N=64 (Nos Y1-Y64).

Simbad objects: 87

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Number of rows : 87
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 [LWZ2012] E MoC 22 18 03.10 +56 05 42.7           ~ 1 0
2 [LWZ2012] D MoC 22 18 03.10 +56 08 07.6           ~ 1 0
3 [LWZ2012] F MoC 22 18 08.80 +56 11 17.3           ~ 1 0
4 [LWZ2012] I MoC 22 18 17.60 +56 12 23.4           ~ 1 0
5 [LWZ2012] C MoC 22 18 20.1 +56 06 00           ~ 1 0
6 NVSS J221826+561307 Rad 22 18 26.97 +56 13 07.7           ~ 1 0
7 [LWZ2012] B MoC 22 18 38.40 +56 03 25.4           ~ 1 0
8 [LWZ2012] G MoC 22 18 39.10 +56 11 17.3           ~ 1 0
9 NVSS J221840+560824 Rad 22 18 40.77 +56 08 24.1           ~ 1 0
10 2MASS J22184518+5604493 Y*O 22 18 45.1688612832 +56 04 49.135243692           ~ 2 0
11 HD 211853 WR* 22 18 45.6057566664 +56 07 33.898679364 8.84 9.534 9.236 9.108   WN6o+O6I 283 0
12 2MASS J22184572+5603526 Y*O 22 18 45.7144792944 +56 03 52.633698948           ~ 2 0
13 2MASS J22184630+5605033 Y*O 22 18 46.3409295816 +56 05 03.641849988           ~ 2 0
14 NVSS J221846+560534 Rad 22 18 46.86 +56 05 34.6           ~ 1 0
15 2MASS J22184726+5605583 Y*O 22 18 47.2601260968 +56 05 58.227486900           ~ 2 0
16 [QZM2008b] J221847.54+560511.2 Y*O 22 18 47.54 +56 05 11.2           ~ 2 0
17 2MASS J22184800+5605028 Y*O 22 18 48.0060656616 +56 05 02.638071024           ~ 2 0
18 2MASS J22184936+5605465 Y*O 22 18 49.3770642360 +56 05 46.506097968           ~ 3 0
19 [QZM2008b] J221849.40+560431.0 Y*O 22 18 49.40 +56 04 31.0           ~ 2 0
20 [QZM2008b] J221849.86+560618.5 Y*O 22 18 49.8658266816 +56 06 18.501717924           ~ 2 0
21 2MASS J22185013+5603408 Y*O 22 18 50.1353360376 +56 03 40.814877636           ~ 2 0
22 [QZM2008b] J221850.78+560506.8 Y*O 22 18 50.7804525240 +56 05 06.795679524           ~ 2 0
23 2MASS J22185222+5606137 Y*O 22 18 52.221 +56 06 13.73           ~ 2 0
24 NVSS J221852+560404 Rad 22 18 52.33 +56 04 04.0           ~ 1 0
25 2MASS J22185249+5606487 Y*O 22 18 52.5037103904 +56 06 48.542534496           ~ 2 0
26 2MASS J22185269+5606050 Y*O 22 18 52.7110892328 +56 06 04.991642244           ~ 4 0
27 2MASS J22185362+5606247 Y*O 22 18 53.623 +56 06 24.77           ~ 2 0
28 [QZM2008b] J221854.35+560459.6 Y*O 22 18 54.35 +56 04 59.6           ~ 2 0
29 [QZM2008b] J221855.39+560512.9 Y*O 22 18 55.39 +56 05 12.9           ~ 2 0
30 [QZM2008b] J221855.67+560516.3 Y*O 22 18 55.67 +56 05 16.3           ~ 2 0
31 [QZM2008b] J221855.67+560455.4 Y*O 22 18 55.6884598128 +56 04 55.282482300           ~ 2 0
32 2MASS J22185614+5605485 Y*O 22 18 56.1433936824 +56 05 48.509007612           ~ 5 0
33 [QZM2008b] J221856.27+560532.3 Y*O 22 18 56.2728995976 +56 05 32.384050512           ~ 2 0
34 NVSS J221856+560954 Rad 22 18 56.55 +56 09 54.6           ~ 1 0
35 NAME SBB 2 Cl* 22 18 56.70 +56 05 10.9           ~ 7 0
36 2MASS J22185717+5605019 Y*O 22 18 57.1837948992 +56 05 01.941818388           ~ 2 0
37 2MASS J22185761+5607070 Y*O 22 18 57.615 +56 07 07.01           ~ 2 0
38 [QZM2008b] J221857.71+560427.5 Y*O 22 18 57.7406516712 +56 04 27.150224520           ~ 2 0
39 [QZM2008b] J221857.82+560552.6 Y*O 22 18 57.82 +56 05 52.6           ~ 2 0
40 2MASS J22185838+5604233 Y*O 22 18 58.382 +56 04 23.31           ~ 2 0
41 BD+55 2722 Y*O 22 18 58.6254723768 +56 07 23.482698528 9.79 10.59 10.15 9.93   O7V(n)z+B 45 0
42 [QZM2008b] J221858.71+560454.5 Y*O 22 18 58.71 +56 04 54.5           ~ 2 0
43 [QZM2008b] J221858.76+560518.8 Y*O 22 18 58.76 +56 05 18.8           ~ 2 0
44 DSH J2218.9+5607 OpC 22 18 59.0 +56 07 18           ~ 19 1
45 [QZM2008b] J221859.21+560500.6 Y*O 22 18 59.2101798960 +56 05 00.353962428           ~ 2 0
46 [QZM2008b] J221859.72+560513.9 Y*O 22 18 59.72 +56 05 13.9           ~ 2 0
47 2MASS J22190007+5603148 Y*O 22 19 00.0752992104 +56 03 14.783253336           ~ 2 0
48 [QZM2008b] J221900.18+560534.7 Y*O 22 19 00.2255493840 +56 05 34.846640304           ~ 2 0
49 [QZM2008b] J221900.26+560641.4 Y*O 22 19 00.2680739016 +56 06 41.357535768           ~ 2 0
50 NVSS J221900+560045 Rad 22 19 00.72 +56 00 45.0           ~ 1 0
51 [QZM2008b] J221902.01+560800.7 Y*O 22 19 02.01 +56 08 00.7           ~ 2 0
52 2MASS J22190200+5607085 Y*O 22 19 02.0122112880 +56 07 08.469017328           ~ 2 0
53 2MASS J22190217+5607257 Y*O 22 19 02.1690786288 +56 07 25.519455984           ~ 2 0
54 2MASS J22190225+5606364 Y*O 22 19 02.2588385064 +56 06 36.241751808           ~ 2 0
55 [QZM2008b] J221902.62+560617.3 Y*O 22 19 02.62 +56 06 17.3           ~ 2 0
56 2MASS J22190276+5605405 Y*O 22 19 02.7847530816 +56 05 40.478096832           ~ 2 0
57 2MASS J22190380+5605103 Y*O 22 19 03.8214021792 +56 05 10.299004260           ~ 2 0
58 [QZM2008b] J221904.36+560550.8 Y*O 22 19 04.36 +56 05 50.8           ~ 2 0
59 2MASS J22190445+5605360 Y*O 22 19 04.458 +56 05 36.05           ~ 2 0
60 [QZM2008b] J221904.50+560507.8 Y*O 22 19 04.50 +56 05 07.8           ~ 2 0
61 NVSS J221905+560442 Rad 22 19 05.13 +56 04 42.5           ~ 1 0
62 ZTF J221905.22+560825.5 LP* 22 19 05.206 +56 08 25.78           ~ 3 0
63 2MASS J22190572+5604526 Y*O 22 19 05.724 +56 04 52.69           ~ 2 0
64 [QZM2008b] J221905.79+560705.9 Y*O 22 19 05.7871869096 +56 07 05.765182356           ~ 2 0
65 2MASS J22190581+5605188 Y*O 22 19 05.8026915672 +56 05 18.835039752           ~ 2 0
66 2MASS J22190594+5605417 Y*O 22 19 05.9321108808 +56 05 41.480777472           ~ 2 0
67 2MASS J22190602+5605552 Y*O 22 19 06.0334258080 +56 05 55.162757076           ~ 2 0
68 2MASS J22190764+5605285 Y*O 22 19 07.6519589928 +56 05 28.520058444           ~ 2 0
69 2MASS J22190802+5604111 Y*O 22 19 08.027 +56 04 11.11           ~ 2 0
70 NAME SBB 1 Cl* 22 19 08.20 +56 05 17.5           ~ 2 0
71 UCAC4 731-082885 Y*O 22 19 08.325480 +56 05 10.88628   15.337 14.428 14.341   ~ 5 1
72 2MASS J22190844+5605286 Y*O 22 19 08.4246111840 +56 05 28.717422756           ~ 2 0
73 LBN 102.79-00.92 HII 22 19 09.0 +56 04 45           ~ 109 0
74 IRAS 22172+5549 Y*O 22 19 09.14787 +56 05 00.0380           ~ 105 0
75 2MASS J22190938+5604456 Y*O 22 19 09.3793104504 +56 04 45.599107368           ~ 3 0
76 [LWZ2012] A MoC 22 19 09.40 +56 04 46.5           ~ 1 0
77 [QZM2008b] J221909.70+560504.8 Y*O 22 19 09.70 +56 05 04.8           ~ 2 0
78 [QZM2008b] J221909.84+560737.4 Y*O 22 19 09.84 +56 07 37.4           ~ 2 0
79 [QZM2008b] J221909.94+560820.5 Y*O 22 19 09.94 +56 08 20.5           ~ 2 0
80 [QZM2008b] J221910.94+560607.6 Y*O 22 19 10.94 +56 06 07.6           ~ 2 0
81 2MASS J22191207+5607090 Y*O 22 19 12.071 +56 07 09.10           ~ 2 0
82 NVSS J221912+560045 Rad 22 19 12.79 +56 00 45.0           ~ 1 0
83 2MASS J22191380+5607483 Y*O 22 19 13.7816487936 +56 07 48.533295864           ~ 2 0
84 2MASS J22191505+5606529 Y*O 22 19 15.0333422856 +56 06 53.019189792           ~ 2 0
85 2MASS J22191518+5607027 Y*O 22 19 15.1976699040 +56 07 02.557122384           ~ 2 0
86 [LWZ2012] H MoC 22 19 26.60 +56 11 17.3           ~ 1 0
87 NVSS J221929+561202 Rad 22 19 29.67 +56 12 02.9           ~ 1 0

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