2018AJ....155...91Y

Query : 2018AJ....155...91Y

2018AJ....155...91Y - Astron. J., 155, 91-91 (2018/February-0)

Searching for Be stars in the open clusters with PTF/iPTF. I. Cluster sample and Be star candidates.

YU P.-C., YU C.-H., LEE C.-D., LIN C.-C., HSIA C.-H., CHANG C.-K., CHEN I.-C., NGEOW C.-C., IP W.-H., CHEN W.-P., LAHER R., SURACE J. and KULKARNI S.R.

Abstract (from CDS):

We conducted a search for Be star candidates in open clusters using Hα imaging photometry of the Palomar Transient Factory Survey to investigate some connections among Be star phenomena, cluster environments, and ages. Stellar members of clusters were identified by spatial distributions, near-infrared magnitudes and colors, and by proper motions. Among 104 open clusters, we identified 96 Be star candidates in 32 clusters; 11 of our candidates have been reported in previous studies. We found that the clusters with age 7.5 < log(t(year)) 8.5 tend to have more Be star candidates; there is about a 40% occurrence rate within this age bin. The clusters in this age bin also tend to have a higher Be fraction N(Be)/N(Be+B-type). These results suggest that the environments of young and intermediate clusters are favorable to the formation of Be phenomena. Spatial distribution of Be star candidates with different ages implies that they do not form preferentially in the central regions. Furthermore, we showed that the mid-infrared (MIR) colors of the Be star candidates are similar to known Be stars, which could be caused by free-free emission or bound-free emission. Some Be star candidates might have no circumstellar dust according to their MIR colors. Finally, among 96 Be candidates, we discovered that one Be star candidate FSR 0904-1 exhibits long-term variability on the timescale of ∼2000 days with an amplitude of 0.2-0.3 mag, indicating a long timescale of disk evolution.

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

Journal keyword(s): open clusters and associations: general - stars: emission-line, Be - stars: general - surveys

VizieR on-line data: <Available at CDS (J/AJ/155/91): table1.dat table2.dat table3.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 133

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Number of rows : 133
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 MAYER 1 OpC 00 21 58.0 +61 45 13           ~ 40 2
2 Cl Stock 20 OpC 00 25 16.5 +62 37 45           ~ 37 0
3 Cl Stock 21 OpC 00 30 21.4 +57 55 29           ~ 39 0
4 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
5 NGC 381 OpC 01 08 23.3 +61 34 39           ~ 76 0
6 Cl Stock 3 OpC 01 12 09 +62 15.5           ~ 17 0
7 [KPR2005] 6 OpC 01 47 22.1 +57 43 56           ~ 36 0
8 TYC 3688-1659-1 * 01 58 11.7375824808 +55 42 18.689648184   11.73 11.29     ~ 1 0
9 NGC 744 OpC 01 58 37.4 +55 29 04   8.38 7.9     ~ 82 0
10 NGC 743 OpC 01 58 39.6 +60 07 53           ~ 33 0
11 [KPR2005] 7 OpC 01 58 55 +58 58.2           ~ 17 0
12 TYC 3688-1741-1 * 01 59 29.5086864288 +55 26 23.434333080   11.45 11.53     ~ 1 0
13 EM* GGA 134 Em* 02 00 10.0467968160 +60 10 53.530381560   12.01 11.22     OB-e 11 0
14 Cl Czernik 6 OpC 02 02 08.4 +62 50 23           ~ 38 0
15 Cl Stock 5 OpC 02 04 17.9 +64 22 22           ~ 44 0
16 NGC 869 OpC 02 18 57.0 +57 08 02           ~ 504 0
17 Cl Basel 10 OpC 02 19 27.8 +58 18 17   11.19 9.9     ~ 45 0
18 EM* VES 734 Em* 02 20 03.7937225184 +63 37 24.630951720   14.30 13.51     ~ 8 0
19 EM* GGA 157 Em* 02 20 20.3440393752 +58 19 32.504987352   12.45 11.97     B 11 0
20 NGC 884 OpC 02 22 15.7 +57 08 59           ~ 503 0
21 NGC 886 OpC 02 23 32.9 +63 48 26           ~ 31 1
22 Cl Czernik 8 OpC 02 32 56.4 +58 45 39   10.89 9.7     ~ 46 0
23 NGC 957 OpC 02 33 25.4 +57 33 13   8.34 7.6     ~ 110 0
24 Cl Czernik 12 OpC 02 39 25.5 +54 54 53           ~ 33 0
25 Ass Cas OB 6 As* 02 43 +61.3           ~ 128 0
26 SAI 24 OpC 02 59 10.8 +60 33 42           ~ 29 0
27 Cl Collinder 34 OpC 02 59 23.00 +60 34 00.0     6.8     ~ 13 0
28 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 7988 0
29 NGC 1220 OpC 03 11 40.6 +53 20 39     11.8     ~ 33 0
30 Cl King 5 OpC 03 14 43.6 +52 41 52           ~ 84 0
31 Cl Czernik 15 OpC 03 23 05.5 +52 13 48           ~ 23 0
32 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
33 NGC 1348 OpC 03 34 07.0 +51 24 23           ~ 36 0
34 Cl Tombaugh 5 OpC 03 47 56.6 +59 04 14   9.01 8.4     ~ 55 0
35 [KPS2012] MWSC 0337 Cl? 04 06 11 +51 54.6           ~ 7 0
36 NGC 1502 OpC 04 07 49.4 +62 19 35   7.47 6.9     ~ 202 1
37 Cl* NGC 1513 RH 27 * 04 09 43.4418363600 +49 28 42.597185376   15.56 14.46     ~ 3 0
38 NGC 1513 OpC 04 09 53.9 +49 30 15   8.71 8.4     ~ 70 0
39 Cl* NGC 1513 RH 45 * 04 10 08.2255754837 +49 26 54.700204420   13.74 12.98     ~ 8 0
40 Cl* NGC 1513 RH 47 * 04 10 17.5360792200 +49 27 50.153452668   13.84 13.25     ~ 7 0
41 Cl Berkeley 11 OpC 04 20 30.0 +44 55 24   11.14 10.4     ~ 46 0
42 [FSR2007] 0728 OpC 04 29 50.7 +38 29 56           ~ 21 0
43 Cl Berkeley 67 OpC 04 37 54.8 +50 45 38           ~ 34 0
44 [FSR2007] 0714 Cl* 04 42 46.0 +41 55 19           ~ 8 0
45 Cl Berkeley 68 OpC 04 44 13.8 +42 08 00           ~ 35 0
46 [FSR2007] 0717 OpC 04 46 06.0 +42 08 03           ~ 11 0
47 NGC 1664 OpC 04 50 59.3 +43 39 48           ~ 143 0
48 TYC 2906-590-1 * 04 52 08.0606944392 +43 42 07.396428276   12.22 11.81     ~ 1 0
49 NGC 1778 OpC 05 08 07.9 +37 01 01   8.20 7.7     ~ 99 0
50 LBN 784 HII 05 13 25.5 +37 27 01           ~ 83 0
51 Cl Berkeley 17 OpC 05 20 30.5 +30 34 20           ~ 192 0
52 Cl Czernik 20 OpC 05 20 31.5 +39 32 36           ~ 44 0
53 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
54 SAI 47 OpC 05 23 58.0 +42 19 01           ~ 26 0
55 [FSR2007] 0777 OpC 05 27 31.0 +34 44 01           ~ 19 0
56 Cl Stock 8 OpC 05 27 54.1 +34 28 41           ~ 93 0
57 NGC 1907 OpC 05 28 07.2 +35 19 33   8.87 8.2     ~ 140 2
58 M 38 OpC 05 28 40.0 +35 49 08   6.69 6.4     ~ 184 2
59 [KPS2012] MWSC 0559 Cl? 05 29 07 +44 46.2           ~ 7 0
60 [KPS2012] MWSC 0566 Cl? 05 32 07 +41 37.1           ~ 6 0
61 M 36 OpC 05 36 19.8 +34 08 02   6.09 6.0     ~ 206 2
62 [FSR2007] 0814 OpC 05 36 51.4 +31 13 12           ~ 38 0
63 * zet Tau Be* 05 37 38.6854231 +21 08 33.158804 2.22 2.84 3.03 3.06 3.15 B1IVe_shell 751 0
64 [FSR2007] 0816 OpC 05 39 20 +31 31.0           ~ 11 0
65 DSH J0539.4+3320 OpC 05 39 29.1 +33 20 49           ~ 27 0
66 [KPS2012] MWSC 0645 Cl? 05 42 16 +33 39.6           ~ 6 0
67 [FSR2007] 0826 OpC 05 43 07.7 +28 59 06           ~ 26 0
68 [FSR2007] 0850 OpC 05 45 02.2 +24 44 04           ~ 30 0
69 [FSR2007] 0795 OpC 05 47 27.0 +35 25 31           ~ 27 0
70 Cl Czernik 23 OpC 05 50 06.2 +28 53 45           ~ 42 0
71 [FSR2007] 0852 OpC 05 53 26.0 +25 11 00           ~ 26 0
72 [FSR2007] 0802 OpC 06 00 59.0 +35 16 54           ~ 35 0
73 NGC 2129 OpC 06 01 06.6 +23 20 04   7.31 6.7     ~ 120 0
74 IC 2157 OpC 06 04 44.7 +24 05 09   8.91 8.4     ~ 51 0
75 [FSR2007] 0833 OpC 06 05 21.8 +30 49 19           ~ 17 0
76 [FSR2007] 0942 OpC 06 05 58.6 +13 40 15           ~ 34 0
77 [FSR2007] 0904 OpC 06 07 01.0 +19 00 52           ~ 30 0
78 [FSR2007] 0858 OpC 06 09 09.0 +25 40 38           ~ 8 0
79 NGC 2175 OpC 06 09 39 +20 29.2   7.0 6.8     ~ 270 3
80 [FSR2007] 0952 OpC 06 10 15.0 +13 00 47           ~ 9 0
81 Cl Pismis 27 OpC 06 10 52.5 +20 37 05           ~ 31 0
82 [FSR2007] 0939 OpC 06 10 57.0 +14 22 57           ~ 9 0
83 [FSR2007] 0968 OpC 06 11 22.4 +11 51 44           ~ 20 0
84 [FSR2007] 0956 OpC 06 12 25.0 +13 00 26           ~ 9 0
85 DSH J0614.2+2229 OpC 06 14 15.5 +22 29 52           ~ 8 1
86 [FSR2007] 0940 OpC 06 14 16.0 +14 48 18           ~ 8 0
87 [BDS2003] 82 OpC 06 14 57 +12 21.0           ~ 7 0
88 [FSR2007] 0891 Cl* 06 17 29.0 +22 25 38           ~ 9 0
89 [FSR2007] 0902 OpC 06 18 19.0 +20 31 42           ~ 10 0
90 [FSR2007] 0953 OpC 06 19 02.9 +14 09 00           ~ 28 0
91 NAME Skiff J0619+18.5 OpC 06 19 19.9 +18 33 58           ~ 25 0
92 [FSR2007] 0951 OpC 06 22 17.9 +14 37 54           ~ 38 0
93 Cl Dolidze 22 OpC 06 23 06.4 +04 40 55           ~ 13 0
94 [FSR2007] 0955 OpC 06 23 52.0 +14 30 26           ~ 8 0
95 GSC 00744-00849 * 06 24 01.2870666168 +14 29 43.175782392   12.3       A2 2 0
96 [KPS2012] MWSC 0873 OpC 06 28 21 +02 56.1           ~ 7 0
97 DSH J0631.4+0648 OpC 06 31 25.6 +06 48 01           ~ 19 1
98 NGC 2244 OpC 06 32 06.9 +04 54 19           ~ 673 1
99 NAME Rosette Nebula HII 06 32 26.76 +04 47 37.1           ~ 522 1
100 [FSR2007] 0974 OpC 06 32 37.1 +12 33 36           ~ 24 0
101 [FSR2007] 0905 OpC 06 33 46.2 +22 20 10           ~ 26 0
102 Cl Basel 8 OpC 06 33 56.1 +08 03 06           ~ 40 0
103 HD 260301 * 06 35 38.3126075616 +08 04 13.343663892     11.5     A2/3 4 0
104 Cl Collinder 107 OpC 06 36 52.8 +04 53 03   5.54 5.1     ~ 46 0
105 Cl* Collinder 110 DI 1301 * 06 38 38.2759614624 +02 13 36.856083396     14.43     ~ 2 0
106 Cl Collinder 110 OpC 06 38 42.3 +02 04 23     10.5     ~ 84 1
107 Cl* Collinder 110 DI 1231 * 06 38 49.7907511296 +02 08 48.802379820     14.48     ~ 2 0
108 Cl* Collinder 110 DI 2245 * 06 38 55.3653742200 +01 57 02.150315424     14.50     ~ 2 0
109 NGC 2269 OpC 06 43 16.8 +04 37 25   10.42 10.0     ~ 41 0
110 Cl Alessi 16 OpC 06 43 35.0 +02 10 24           ~ 8 0
111 [FSR2007] 1025 OpC 06 50 28.7 +06 36 50           ~ 17 0
112 [KPS2012] MWSC 1012 OpC 06 54 04 +06 43.5           ~ 9 0
113 [FSR2007] 0866 OpC 06 55 19.2 +29 45 31           ~ 32 0
114 * bet CMi Be* 07 27 09.0417373 +08 17 21.536745 2.52 2.80 2.89 2.90 2.96 B8Ve 400 0
115 [KPS2012] MWSC 1407 OpC 08 00 20 +01 15.6           ~ 7 0
116 NGC 6811 OpC 19 37 21.8 +46 22 43   7.47 6.8     ~ 435 0
117 NGC 6866 OpC 20 03 57.7 +44 10 22   8.04 7.6     ~ 185 0
118 Cl Dolidze 1 OpC 20 09 27.2 +36 28 41           ~ 20 0
119 NGC 6910 OpC 20 23 12.2 +40 46 16           ~ 202 0
120 [FSR2007] 0213 OpC 20 26 59 +38 58.3           ~ 12 0
121 DSH J2035.1+5318 OpC 20 35 08.3 +53 18 00           ~ 8 0
122 [CBJ2002] 4 OpC 20 56 13 +44 23.1           ~ 8 0
123 Cl Collinder 428 OpC 21 03 04 +44 33.6     8.7     ~ 19 0
124 [KPS2012] MWSC 3457 OpC 21 03 30 +39 58.8           ~ 8 0
125 V* VY Cyg cC* 21 04 16.6363625496 +39 58 20.106736608 11.74 10.66 9.56   8.090 F5.5-G0.5Ib 150 0
126 NGC 7031 OpC 21 07 12.9 +50 52 07   10.01 9.1     ~ 65 1
127 [D75b] Em* 22-013 Y*? 22 10 51.2112331776 +57 49 33.764100600   12.81 12.13     ~ 4 0
128 [FSR2007] 0354 OpC 22 11 10 +57 39.6           ~ 13 0
129 EM* GGR 51 Y*? 22 12 13.5564761496 +57 39 37.292286060   13.06 12.37 12.07   ~ 5 0
130 [FSR2007] 0398 OpC 22 36 29.8 +64 09 10           ~ 25 0
131 EM* GGR 141 Em* 23 24 21.8498766192 +61 29 21.156309708   12.25 11.81 12.11   ~ 10 0
132 EM* GGR 143 Em* 23 24 46.3656293736 +61 26 15.415727892   12.28 11.72 11.65   B9 12 0
133 M 52 OpC 23 24 47.2 +61 35 32           ~ 200 0

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