2016ApJ...833...85B

Query : 2016ApJ...833...85B

2016ApJ...833...85B - Astrophys. J., 833, 85-85 (2016/December-2)

Star formation around mid-infrared bubble N37: evidence of cloud-cloud collision.

BAUG T., DEWANGAN L.K., OJHA D.K. and NINAN J.P.

Abstract (from CDS):

We have performed a multi-wavelength analysis of a mid-infrared (MIR) bubble N37 and its surrounding environment. The selected 15' x 15' area around the bubble contains two molecular clouds (N37 cloud; Vlsr ∼  37-43 km s–1, and C25.29+0.31; Vlsr ∼  43-48 km s–1) along the line of sight. A total of seven OB stars are identified toward the bubble N37 using photometric criteria, and two of them are spectroscopically confirmed as O9V and B0V stars. The spectro-photometric distances of these two sources confirm their physical association with the bubble. The O9V star appears to be the primary ionizing source of the region, which is also in agreement with the desired Lyman continuum flux analysis estimated from the 20 cm data. The presence of the expanding H ii region is revealed in the N37 cloud, which could be responsible for the MIR bubble. Using the 13CO line data and photometric data, several cold molecular condensations as well as clusters of young stellar objects (YSOs) are identified in the N37 cloud, revealing ongoing star formation (SF) activities. However, the analysis of ages of YSOs and the dynamical age of the H ii region do not support the origin of SF due to the influence of OB stars. The position-velocity analysis of 13CO data reveals that two molecular clouds are interconnected by a bridge-like structure, favoring the onset of a cloud-cloud collision process. The SF activities (i.e., the formation of YSO clusters and OB stars) in the N37 cloud are possibly influenced by the cloud-cloud collision.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): dust, extinction - H ii regions - ISM: clouds - ISM: individual objects: N37 - stars: formation - stars: formation

VizieR on-line data: <Available at CDS (J/ApJ/833/85): table1.dat table2.dat>

Simbad objects: 93

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Number of rows : 93
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 RCW 38 SFR 08 59 05.50 -47 30 39.4           ~ 327 2
2 SH 2-3 HII 17 12.4 -38 28           ~ 234 1
3 2MASS J18355444-0640475 Y*O 18 35 54.444 -06 40 47.58           ~ 1 0
4 2MASS J18355738-0640078 Y*O 18 35 57.384 -06 40 07.82           ~ 2 0
5 2MASS J18355882-0643190 Y*O 18 35 58.830 -06 43 19.01           ~ 2 0
6 2MASS J18360114-0637428 Y*O 18 36 01.1445618816 -06 37 42.916200132           ~ 2 0
7 2MASS J18360293-0640258 Y*O 18 36 02.937 -06 40 25.87           ~ 1 0
8 SPICY 87575 Y*O 18 36 02.955 -06 42 40.75           ~ 2 0
9 2MASS J18360342-0639147 Y*O 18 36 03.422 -06 39 14.75           ~ 1 0
10 2MASS J18360343-0643156 Y*O 18 36 03.4303914288 -06 43 15.581870112           ~ 2 0
11 2MASS J18360393-0641105 Y*O 18 36 03.9410879376 -06 41 10.409352864           ~ 2 0
12 2MASS J18360493-0639179 Y*O 18 36 04.9267752768 -06 39 17.722534644           ~ 3 0
13 SPICY 87601 Y*O 18 36 05.521 -06 43 56.24           ~ 3 0
14 2MASS J18360751-0641175 Y*O 18 36 07.511 -06 41 17.55           ~ 1 0
15 SSTGLMC G025.2000+00.3184 LP* 18 36 07.7108824968 -06 43 50.128305888           ~ 2 0
16 2MASS J18360926-0640599 Y*O 18 36 09.268 -06 40 59.91           ~ 2 0
17 2MASS J18360950-0639327 Y*O 18 36 09.5187872952 -06 39 32.307810948           ~ 3 0
18 2MASS J18361027-0641456 Y*O 18 36 10.272 -06 41 45.68           ~ 1 0
19 2MASS J18361064-0642150 Y*O 18 36 10.649 -06 42 15.09           ~ 2 0
20 2MASS J18361133-0643315 Y*O 18 36 11.3366284584 -06 43 31.449118080           ~ 3 0
21 2MASS J18361414-0645056 Y*O 18 36 14.1430100352 -06 45 05.212276056           ~ 1 0
22 2MASS J18361676-0643375 Y*O 18 36 16.7676685392 -06 43 37.338575700           ~ 3 0
23 SSTGLMC G025.2255+00.2884 Y*O 18 36 16.954 -06 43 18.36           ~ 1 0
24 2MASS J18361711-0642410 Y*O 18 36 17.1125313360 -06 42 40.907750364           ~ 2 0
25 2MASS J18361739-0639155 * 18 36 17.395 -06 39 15.51           ~ 1 0
26 2MASS J18361748-0644086 Y*O 18 36 17.482 -06 44 08.64           ~ 1 0
27 IRAS 18335-0646 FIR 18 36 17.6 -06 43 30           ~ 5 0
28 2MASS J18361772-0645419 Y*O 18 36 17.7286053600 -06 45 41.516341776           ~ 2 0
29 2MASS J18361836-0638385 Y*O 18 36 18.365 -06 38 38.52           ~ 2 0
30 2MASS J18361861-0634091 Y*O 18 36 18.612 -06 34 09.20           ~ 1 0
31 2MASS J18361862-0639098 * 18 36 18.6177467784 -06 39 09.832314780           O9V 1 0
32 2MASS J18361898-0645069 Y*O 18 36 18.984 -06 45 06.96           ~ 2 0
33 2MASS J18361898-0640588 Y*O 18 36 18.989 -06 40 58.89           ~ 2 0
34 2MASS J18361900-0639243 Y*O 18 36 19.0040330136 -06 39 24.453973368           ~ 2 0
35 2MASS J18361944-0644195 Y*O 18 36 19.447 -06 44 19.50           ~ 1 0
36 2MASS J18361961-0645545 Y*O 18 36 19.5833610576 -06 45 54.503175672           ~ 2 0
37 2MASS J18361991-0639077 Y*O 18 36 19.8843274248 -06 39 07.585125588           ~ 2 0
38 SPICY 87739 Y*O 18 36 19.998 -06 44 21.10           ~ 2 0
39 [ABJ2009] C25.29+0.31 MoC 18 36 20 -06 39.3           ~ 4 0
40 2MASS J18362009-0644166 Y*O 18 36 20.0742414432 -06 44 16.726347744           ~ 2 0
41 2MASS J18362016-0639050 * 18 36 20.169 -06 39 05.08           ~ 1 0
42 2MASS J18362024-0638509 Y*O 18 36 20.2450439232 -06 38 51.039192156           B0V 2 0
43 2MASS J18362052-0641375 Y*O 18 36 20.5262477664 -06 41 38.147594208           ~ 1 0
44 2MASS J18362064-0638544 Y*O 18 36 20.6621955720 -06 38 54.615250968           ~ 2 0
45 2MASS J18362078-0638505 Y*O 18 36 20.7856767120 -06 38 50.498083284           ~ 2 0
46 2MASS J18362100-0638573 Y*O 18 36 21.0119787744 -06 38 57.751447992           ~ 1 0
47 2MASS J18362106-0636483 Y*O 18 36 21.062 -06 36 48.37           ~ 3 0
48 2MASS J18362135-0643269 Y*O 18 36 21.353 -06 43 26.95           ~ 1 0
49 2MASS J18362139-0638529 Y*O 18 36 21.3887752032 -06 38 53.083573836           ~ 3 0
50 2MASS J18362143-0643115 Y*O 18 36 21.4341539688 -06 43 11.742341880           ~ 1 0
51 2MASS J18362243-0638536 Y*O 18 36 22.4347385400 -06 38 53.838421188           ~ 1 0
52 2MASS J18362273-0644223 Y*O 18 36 22.7279685312 -06 44 22.469669952           ~ 2 0
53 [CPA2006] N37 bub 18 36 23 -06 39.6           ~ 18 0
54 GAL 025.292+00.293 HII 18 36 23 -06 39.6           ~ 1 1
55 2MASS J18362320-0639272 * 18 36 23.2094934456 -06 39 27.701003988           ~ 1 0
56 2MASS J18362324-0633115 Y*O 18 36 23.247 -06 33 11.58           ~ 1 0
57 2MASS J18362329-0638338 * 18 36 23.299 -06 38 33.86           ~ 1 0
58 2MASS J18362421-0640284 Y*O 18 36 24.211 -06 40 28.47           ~ 2 0
59 2MASS J18362459-0641143 Y*O 18 36 24.5682466224 -06 41 13.854804792           ~ 2 0
60 ZTF J183624.93-063941.5 LP* 18 36 24.9394760496 -06 39 41.542630560           ~ 4 0
61 2MASS J18362553-0639465 Y*O 18 36 25.5299181072 -06 39 46.566180144           ~ 1 0
62 2MASS J18362672-0633532 Y*O 18 36 26.726 -06 33 53.21           ~ 2 0
63 2MASS J18362672-0641465 Y*O 18 36 26.730 -06 41 46.54           ~ 2 0
64 2MASS J18362683-0637336 Y*O 18 36 26.836 -06 37 33.62           ~ 1 0
65 2MASS J18362691-0639365 Y*O 18 36 26.9032650600 -06 39 36.609724332           ~ 2 0
66 2MASS J18362966-0644573 Y*O 18 36 29.6832014280 -06 44 57.724363392           ~ 1 0
67 2MASS J18363115-0643196 Y*O 18 36 31.155 -06 43 19.61           ~ 2 0
68 2MASS J18363174-0641171 Y*O 18 36 31.7397830712 -06 41 17.266530516           ~ 2 0
69 2MASS J18363200-0638478 Y*O 18 36 32.006 -06 38 47.81           ~ 1 0
70 2MASS J18363311-0639069 Y*O 18 36 33.112 -06 39 06.96           ~ 1 0
71 2MASS J18363357-0643200 Y*O 18 36 33.580 -06 43 20.02           ~ 2 0
72 2MASS J18363530-0645238 Y*O 18 36 35.308 -06 45 23.84           ~ 2 0
73 2MASS J18363534-0645187 Y*O 18 36 35.3440283376 -06 45 18.881643204           ~ 1 0
74 2MASS J18363594-0636487 Y*O 18 36 35.946 -06 36 48.70           ~ 3 0
75 2MASS J18363609-0637518 Y*O 18 36 36.096 -06 37 51.81           ~ 2 0
76 2MASS J18363709-0637026 Y*O 18 36 37.099 -06 37 02.65           ~ 3 0
77 SSTGLMC G025.2877+00.2202 Y*O 18 36 38.505 -06 41 52.09           ~ 1 0
78 2MASS J18363879-0643170 Y*O 18 36 38.7919805184 -06 43 17.207085036           ~ 2 0
79 2MASS J18363936-0636016 Y*O 18 36 39.3610332504 -06 36 01.698813468           ~ 2 0
80 2MASS J18363938-0639114 Y*O 18 36 39.388 -06 39 11.43           ~ 2 0
81 2MASS J18364052-0647252 Y*O 18 36 40.524 -06 47 25.25           ~ 2 0
82 2MASS J18364120-0635143 Y*O 18 36 41.209 -06 35 14.36           ~ 2 0
83 2MASS J18364184-0643310 Y*O 18 36 41.8410521328 -06 43 31.221020064           ~ 2 0
84 LBN 025.36+00.24 HII 18 36 42.3 -06 37 28           ~ 15 0
85 SPICY 87962 Y*O 18 36 43.395 -06 45 01.68           ~ 2 0
86 2MASS J18364355-0645379 Y*O 18 36 43.552 -06 45 37.97           ~ 1 0
87 SSTGLMC G025.3484+00.2268 Y*O 18 36 43.834 -06 38 27.16           ~ 2 0
88 SPICY 87966 Y*O 18 36 44.711 -06 40 14.73           ~ 2 0
89 2MASS J18364484-0643344 Y*O 18 36 44.845 -06 43 34.41           ~ 3 0
90 2MASS J18364715-0645570 Y*O 18 36 47.154 -06 45 57.03           ~ 2 0
91 2MASS J18365060-0634371 Y*O 18 36 50.6035465416 -06 34 37.220731608           ~ 3 0
92 2MASS J18365688-0636045 Y*O 18 36 56.888 -06 36 04.56           ~ 2 0
93 2MASS J18370051-0637455 Y*O 18 37 00.513 -06 37 45.57           ~ 1 0

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