2016MNRAS.461.2502Y

Query : 2016MNRAS.461.2502Y

2016MNRAS.461.2502Y - Mon. Not. R. Astron. Soc., 461, 2502-2518 (2016/September-3)

A multiwavelength investigation of the H II region S311: young stellar population and star formation.

YADAV R.K., PANDEY A.K., SHARMA S., OJHA D.K., SAMAL M.R., MALLICK K.K., JOSE J., OGURA K., RICHICHI A., IRAWATI P., KOBAYASHI N. and ESWARAIAH C.

Abstract (from CDS):

We present a multiwavelength investigation of the young stellar population and star formation activities around the H ii region Sharpless 311. Using our deep near-infrared observations and archival Spitzer-IRAC observations, we have detected a total of 125 young stellar objects (YSOs) in an area of ∼86 arcmin2. The YSO sample includes eight Class I and 117 Class II candidate YSOs. The mass completeness of the identified YSO sample is estimated to be 1.0 M☉. The ages and masses of the majority of the candidate YSOs are estimated to be in the range ∼0.1-5 Myr and ∼0.3-6 M☉, respectively. The 8-µm image of S311 displays an approximately spherical cavity around the ionizing source, which was possibly created by the expansion of the H ii region. The spatial distribution of the candidate YSOs reveals that a significant number of them are distributed systematically along the 8-µm emission with a majority clustered around the eastern border of the H ii region. Four clumps/compact H ii regions are detected in the radio continuum observations at 1280 MHz, which may have been formed during the expansion of the H ii region. The estimated dynamical age of the region, main-sequence lifetime of the ionizing source, the spatial distribution and ages of the candidate YSOs indicate triggered star formation in the complex.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): Stars: clusters - star clusters: individual: (Haffner 18) - stars: formation - stars: pre-main sequence - ISM: H - regions - ISM: Individual Objects: S311 - ISM: Individual Objects: S311

VizieR on-line data: <Available at CDS (J/MNRAS/461/2502): table1.dat table2.dat table4.dat table5.dat>

Nomenclature: Table 1: [YPS2016] DDD.dddddd+DD.dddddd N=2671. Table 2: [YPS2016] NNN (Nos 1-125). Fig. 5, Table 3: [YPS2016] A (Nos A-D).

Simbad objects: 135

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Number of rows : 135
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 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
2 [YPS2016] 65 Y*O 07 52 06.292 -26 25 59.38           ~ 1 0
3 [YPS2016] 86 Y*O 07 52 12.120 -26 20 57.73           ~ 1 0
4 [YPS2016] 112 Y*O 07 52 17.900 -26 20 23.97           ~ 1 0
5 NGC 2467 OpC 07 52 18 -26 25.7           ~ 190 1
6 [YPS2016] 24 Y*O 07 52 19.590 -26 20 34.72     20.490   18.059 ~ 1 0
7 HD 64315 EB* 07 52 20.2841727949 -26 25 46.683038109 8.76 9.49 9.24 9.63 8.86 O5.5Vz+O7V 124 1
8 [YPS2016] 87 Y*O 07 52 20.586 -26 28 06.83           ~ 1 0
9 [YPS2016] 83 Y*O 07 52 29.150 -26 27 38.96           ~ 1 0
10 [YPS2016] 5 Y*O 07 52 31.0428986688 -26 27 00.705260916     17.154   14.550 ~ 1 0
11 [YPS2016] 96 Y*O 07 52 31.079 -26 23 44.42           ~ 1 0
12 [YPS2016] 115 Y*O 07 52 31.164 -26 24 52.54           ~ 1 0
13 [YPS2016] 52 Y*O 07 52 31.3020824568 -26 22 05.316388932     22.398   20.075 ~ 1 0
14 [YPS2016] 51 Y*O 07 52 31.4561936352 -26 25 45.110632296     22.375   19.667 ~ 1 0
15 [YPS2016] 11 Y*O 07 52 31.5197281824 -26 26 06.640580832     18.579   15.039 ~ 1 0
16 2MASS J07523164-2622072 Y*O 07 52 31.6398406152 -26 22 07.111663608 18.019 17.580 16.771   15.144 ~ 3 0
17 [YPS2016] 55 Y*O 07 52 31.705 -26 25 06.28     22.913   20.588 ~ 1 0
18 2MASS J07523202-2622375 Y*O 07 52 32.0172382968 -26 22 37.382066112           ~ 3 0
19 2MASS J07523213-2622304 Y*O 07 52 32.1335904288 -26 22 30.248036364           ~ 3 0
20 [YPS2016] 12 Y*O 07 52 32.7189794304 -26 25 11.804164248     18.608   15.575 ~ 1 0
21 [YPS2016] 29 Y*O 07 52 32.9725631352 -26 25 19.246899684     20.927   18.830 ~ 1 0
22 [YPS2016] 79 Y*O 07 52 33.0509979888 -26 22 42.646552860           ~ 1 0
23 [YPS2016] 121 Y*O 07 52 33.085 -26 25 03.86           ~ 1 0
24 [YPS2016] 114 Y*O 07 52 33.150 -26 23 43.44           ~ 1 0
25 2MASS J07523349-2626483 Y*O 07 52 33.4924137312 -26 26 48.153316164     17.014   14.935 ~ 5 0
26 [YPS2016] 27 Y*O 07 52 34.3296909936 -26 24 38.577064752     20.801   18.739 ~ 1 0
27 2MASS J07523444-2626347 Y*O 07 52 34.446 -26 26 34.71     19.217     ~ 2 0
28 [YPS2016] 119 Y*O 07 52 34.667 -26 22 42.44           ~ 1 0
29 [YPS2016] 10 Y*O 07 52 35.024 -26 25 53.57     18.529   16.898 ~ 1 0
30 [YPS2016] 73 Y*O 07 52 35.123 -26 26 33.31           ~ 1 0
31 [YPS2016] 76 Y*O 07 52 35.151 -26 20 53.82           ~ 1 0
32 [YPS2016] 8 Y*O 07 52 35.283 -26 27 54.91     18.162   17.112 ~ 1 0
33 [YPS2016] 41 Y*O 07 52 35.3917507680 -26 25 55.582138380     21.335   18.666 ~ 1 0
34 [YPS2016] 53 Y*O 07 52 35.4410687616 -26 24 02.698442136     22.473   19.813 ~ 1 0
35 [YPS2016] 113 Y*O 07 52 35.482 -26 26 16.61           ~ 1 0
36 2MASS J07523554-2626347 Y*O 07 52 35.5369063200 -26 26 34.528478748     18.742   16.033 ~ 3 0
37 2MASS J07523554-2625083 Y*O 07 52 35.5494917688 -26 25 08.114733948     19.158   16.724 ~ 3 0
38 [YPS2016] 124 Y*O 07 52 35.557 -26 24 36.39           ~ 1 0
39 [YPS2016] 39 Y*O 07 52 35.629 -26 22 40.80     21.307   18.988 ~ 1 0
40 [YPS2016] 54 Y*O 07 52 35.6433454608 -26 25 34.281449832     22.850   19.929 ~ 1 0
41 [YPS2016] 31 Y*O 07 52 35.7697269384 -26 25 50.195664084     21.027   18.123 ~ 1 0
42 [YPS2016] 33 Y*O 07 52 35.7984935544 -26 28 11.625827988     21.112   18.881 ~ 1 0
43 2MASS J07523586-2621584 Y*O 07 52 35.8594784232 -26 21 58.257039816           ~ 5 0
44 2MASS J07523621-2625478 Y*O 07 52 36.2175030456 -26 25 47.732397924     19.170   17.266 ~ 3 0
45 [YPS2016] 70 Y*O 07 52 36.286 -26 26 13.15           ~ 1 0
46 [YPS2016] 37 Y*O 07 52 36.3094227192 -26 23 51.268825392     21.250   18.791 ~ 1 0
47 [YPS2016] 1 Y*O 07 52 36.3107128608 -26 22 46.524199908 16.518 15.884 15.198   13.906 ~ 3 0
48 [YPS2016] 60 Y*O 07 52 36.315 -26 25 58.50           ~ 1 0
49 [YPS2016] 19 Y*O 07 52 36.3706762248 -26 25 43.973074632     19.728   17.741 ~ 1 0
50 [YPS2016] 106 Y*O 07 52 36.407 -26 25 07.80           ~ 1 0
51 2MASS J07523645-2626115 Y*O 07 52 36.4457759280 -26 26 11.371784712     22.120   19.020 ~ 3 0
52 [YPS2016] 98 Y*O 07 52 36.451 -26 22 57.95           ~ 1 0
53 [YPS2016] 69 Y*O 07 52 36.641 -26 24 39.15           ~ 1 0
54 2MASS J07523678-2623232 Y*O 07 52 36.786 -26 23 23.20           ~ 2 0
55 [YPS2016] 56 Y*O 07 52 36.8050358400 -26 24 28.662612336     22.930   19.887 ~ 1 0
56 [YPS2016] 92 Y*O 07 52 36.8196606720 -26 24 56.037839112           ~ 1 0
57 [YPS2016] 77 Y*O 07 52 37.044 -26 24 51.22           ~ 1 0
58 [YPS2016] 105 Y*O 07 52 37.299 -26 22 32.04           ~ 1 0
59 [YPS2016] 89 Y*O 07 52 37.346 -26 22 44.88           ~ 1 0
60 [YPS2016] 71 Y*O 07 52 37.3746578184 -26 22 25.252372740           ~ 1 0
61 [YPS2016] 45 Y*O 07 52 37.5238291152 -26 24 52.824828888     21.793   19.449 ~ 1 0
62 [YPS2016] 30 Y*O 07 52 37.6251145584 -26 22 09.891577848     20.962   18.868 ~ 1 0
63 [YPS2016] 91 Y*O 07 52 37.782 -26 25 25.70           ~ 1 0
64 [YPS2016] 36 Y*O 07 52 37.8430483872 -26 26 15.430214148     21.234   18.971 ~ 1 0
65 [YPS2016] 7 Y*O 07 52 37.884 -26 23 38.68     18.117   16.455 ~ 1 0
66 [YPS2016] 100 Y*O 07 52 37.886 -26 25 43.29           ~ 1 0
67 [YPS2016] 94 Y*O 07 52 37.991 -26 22 17.05           ~ 1 0
68 [YPS2016] 22 Y*O 07 52 38.000 -26 23 19.37     20.013   17.929 ~ 1 0
69 [YPS2016] 123 Y*O 07 52 38.002 -26 22 25.93           ~ 1 0
70 [YPS2016] 111 Y*O 07 52 38.102 -26 24 55.92           ~ 1 0
71 [YPS2016] 17 Y*O 07 52 38.289 -26 23 14.13     19.235   17.132 ~ 1 0
72 [YPS2016] 122 Y*O 07 52 38.436 -26 25 26.70           ~ 1 0
73 [YPS2016] 120 Y*O 07 52 38.439 -26 24 24.92           ~ 1 0
74 [YPS2016] 40 Y*O 07 52 38.441 -26 27 08.26     21.331   19.124 ~ 1 0
75 [YPS2016] 48 Y*O 07 52 38.4553642440 -26 25 03.097207524     22.102   19.319 ~ 1 0
76 [YPS2016] 103 Y*O 07 52 38.699 -26 25 06.40           ~ 1 0
77 [YPS2016] 107 Y*O 07 52 38.705 -26 24 54.84           ~ 1 0
78 [YPS2016] 34 Y*O 07 52 38.714 -26 24 14.36     21.153   18.765 ~ 1 0
79 [YPS2016] 26 Y*O 07 52 39.0143918928 -26 21 32.177337516     20.724   17.786 ~ 1 0
80 [YPS2016] 32 Y*O 07 52 39.1683684744 -26 22 40.000891584     21.088   18.537 ~ 1 0
81 [YPS2016] 117 Y*O 07 52 39.179 -26 25 15.52           ~ 1 0
82 [YPS2016] 93 Y*O 07 52 39.223 -26 28 10.32           ~ 1 0
83 [YPS2016] 25 Y*O 07 52 39.501 -26 22 33.73     20.530   18.009 ~ 1 0
84 [YPS2016] 109 Y*O 07 52 39.6246740664 -26 23 16.211710356           ~ 1 0
85 [YPS2016] 97 Y*O 07 52 39.833 -26 28 06.18           ~ 1 0
86 Cl Haffner 18 OpC 07 52 40.0 -26 23 28   10.09 9.3     ~ 60 1
87 [YPS2016] 85 Y*O 07 52 40.012 -26 24 07.10           ~ 1 0
88 [YPS2016] 21 Y*O 07 52 40.2625385784 -26 22 21.803097288     19.947   17.816 ~ 1 0
89 [YPS2016] 88 Y*O 07 52 40.514 -26 24 52.35           ~ 1 0
90 [YPS2016] 95 Y*O 07 52 40.616 -26 24 18.85           ~ 1 0
91 [YPS2016] 9 Y*O 07 52 40.6920377553 -26 22 38.850572311     18.181   16.127 ~ 2 0
92 [YPS2016] 47 Y*O 07 52 40.8476070720 -26 22 48.636608772     21.879   19.222 ~ 1 0
93 [YPS2016] 42 Y*O 07 52 40.9150820112 -26 23 04.957835568     21.378   19.043 ~ 1 0
94 [YPS2016] 118 Y*O 07 52 41.040 -26 24 35.43           ~ 1 0
95 [YPS2016] 44 Y*O 07 52 41.0926032024 -26 25 24.015782892     21.708   18.972 ~ 1 0
96 [YPS2016] 90 Y*O 07 52 41.1196026768 -26 22 24.712339440           ~ 1 0
97 [YPS2016] 108 Y*O 07 52 41.180 -26 24 17.34           ~ 1 0
98 [YPS2016] 75 Y*O 07 52 41.446 -26 25 27.67           ~ 1 0
99 [YPS2016] 6 Y*O 07 52 41.5087344240 -26 23 48.225533064     17.266   15.961 ~ 2 0
100 [YPS2016] 74 Y*O 07 52 41.580 -26 23 27.73           ~ 1 0
101 [YPS2016] 80 Y*O 07 52 41.867 -26 24 01.21           ~ 1 0
102 [YPS2016] 63 Y*O 07 52 41.880 -26 23 33.10           ~ 1 0
103 [YPS2016] 102 Y*O 07 52 41.968 -26 23 26.35           ~ 1 0
104 [YPS2016] 64 Y*O 07 52 41.970 -26 24 32.85           ~ 1 0
105 [YPS2016] 28 Y*O 07 52 42.0737482320 -26 23 20.623360452     20.893   18.493 ~ 1 0
106 2MASS J07524222-2622509 Y*O 07 52 42.2274106296 -26 22 50.750731884     19.324   17.073 ~ 3 0
107 [YPS2016] 84 Y*O 07 52 42.380 -26 23 33.31           ~ 1 0
108 [YPS2016] 61 Y*O 07 52 42.413 -26 23 52.06           ~ 1 0
109 [YPS2016] 23 Y*O 07 52 42.530 -26 23 27.05     20.265   18.147 ~ 1 0
110 [YPS2016] 99 Y*O 07 52 42.592 -26 22 21.64           ~ 1 0
111 [YPS2016] 46 Y*O 07 52 42.706 -26 23 25.59     21.813   19.236 ~ 1 0
112 [YPS2016] 35 Y*O 07 52 42.762 -26 23 22.84     21.179   18.625 ~ 1 0
113 2MASS J07524281-2625458 Y*O 07 52 42.8071415736 -26 25 45.768147204 18.315 17.625 16.785   15.639 ~ 5 0
114 [YPS2016] 66 Y*O 07 52 42.834 -26 28 11.41           ~ 1 0
115 [YPS2016] 104 Y*O 07 52 42.880 -26 25 18.52           ~ 1 0
116 [YPS2016] 110 Y*O 07 52 42.978 -26 24 20.08           ~ 1 0
117 [YPS2016] 50 Y*O 07 52 43.1624738040 -26 25 32.716651008     22.147   19.556 ~ 1 0
118 [YPS2016] 116 Y*O 07 52 43.262 -26 23 05.77           ~ 1 0
119 [YPS2016] 101 Y*O 07 52 43.802 -26 23 35.02           ~ 1 0
120 [YPS2016] 125 Y*O 07 52 43.813 -26 24 22.39           ~ 1 0
121 [YPS2016] 78 Y*O 07 52 43.876 -26 23 46.64           ~ 1 0
122 [YPS2016] 72 Y*O 07 52 44.099 -26 24 50.44           ~ 1 0
123 [YPS2016] 38 Y*O 07 52 44.1172000344 -26 25 16.930888212     21.283   18.977 ~ 1 0
124 [YPS2016] 82 Y*O 07 52 44.202 -26 25 22.43           ~ 1 0
125 [YPS2016] 20 Y*O 07 52 44.4073603992 -26 23 50.217521460     19.738   17.727 ~ 1 0
126 [YPS2016] 68 Y*O 07 52 44.421 -26 24 36.62           ~ 1 0
127 [SHD2009] 7 Y*O 07 52 44.447 -26 22 59.31           ~ 2 0
128 [YPS2016] 81 Y*O 07 52 44.454 -26 25 05.97           ~ 1 0
129 [YPS2016] 43 Y*O 07 52 44.6455027752 -26 25 05.204841780     21.501   18.813 ~ 1 0
130 Cl Haffner 19 OpC 07 52 45.9 -26 16 32           ~ 61 0
131 CD-26 5126 * 07 52 50.4193005096 -26 28 22.217536380 10.97 11.67 11.38 11.34 10.97 B0.5V: 26 0
132 CD-26 5129 * 07 52 55.3937606256 -26 28 42.725747784 10.32 11.02 10.73 10.71 10.28 O7Vz 26 0
133 Ass Pup OB 1 As* 07 53 -26.8           ~ 26 0
134 HD 64568 * 07 53 38.2051918848 -26 14 02.598056556 8.64 9.50 9.39 9.77 9.204 O3V((f*))z 116 0
135 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2

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