2000A&AS..147...99B


Query : 2000A&AS..147...99B

2000A&AS..147...99B - Astron. Astrophys., Suppl. Ser., 147, 99-109 (2000/November-2)

CCD photometric search for peculiar stars in open clusters. I. NGC 2169, Melotte 105 and NGC 6250.

BAYER C., MAITZEN H.M., PAUNZEN E., RODE-PAUNZEN M. and SPERL M.

Abstract (from CDS):

The search for chemically peculiar (CP) stars in open clusters using photoelectric photometry sampling the presence of the characteristic flux depression feature at 5200Åvia the Δa-system (Maitzen, 1976A&A....51..223M) has so far delivered data for objects usually no more distant than 1000pc from the Sun. A series of fourteen papers (first: Maitzen & Hensberge, 1981A&A....96..151M; for the time being last: Maitzen, 1993A&AS..102....1M) were devoted to 1240 stars in 38 open cluster fields. If one intends to study the presence of CP stars at larger distances from the Sun, classical photometry has to be replaced by CCD photometry. We have therefore initialized in 1995 a new survey in open clusters and the Large Magellanic Cloud using the CCD technology. As a first step, we have presented new Δa-photometry of 22 CP2 stars in the galactic field to prove the capability of CCD photometry for our aim (Maitzen et al., 1997A&A...327..636M). In the first paper of a new series devoted to CCD photometry, we present data on NGC 2169 (13 stars investigated), Melotte 105 (114 stars), and NGC 6250 (48 stars). NGC 2169 was used to test our results with those of classical photometry which yields excellent agreement. For NGC 6250 we find two new definite CP2 (according to the definition by Preston, 1974ARA&A..12..257P) stars (Δa=0.065 and 0.026mag) and two λ Bootis candidates. Twelve objects with only marginally peculiar Δa-values for Melotte 105 were detected. Additional spectroscopic and photometric evidence is needed to substantiate their peculiarity.

Abstract Copyright:

Journal keyword(s): stars: chemically peculiar - stars: early-type - techniques: photometric - open clusters and associations: general

Nomenclature: Table 5: Cl* Melotte 105 BMP NNN (Nos 1-114). Table 6: Cl* NGC 6250 BMP NN (Nos 1-48).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 123

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Number of rows : 123
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NGC 2169 15 * 06 08 15.7555871256 +13 57 39.188820996 11.22 11.21 11.103 11.01   B9.5V 18 0
2 TYC 742-2177-1 * 06 08 18.7270914624 +13 59 18.845763288   10.47 10.34 10.59   B9V 16 1
3 NGC 2169 16 * 06 08 22.9260813672 +13 59 28.740955128   11.29 11.224 11.10   B9V 15 0
4 V* V1356 Ori a2* 06 08 24.1247449056 +13 56 47.872901400   10.0 10.855 10.76   A0V 45 0
5 NGC 2169 13 * 06 08 27.1113745920 +13 56 47.881879584   10.82 10.825     B5 14 0
6 V* V917 Ori bC* 06 08 27.3564998448 +13 55 51.134267496   8.74 8.871     B3Vn 50 0
7 NGC 2169 OpC 06 08 30 +13 57.1   5.99 5.9     ~ 159 0
8 HD 252266 * 06 08 30.1744002048 +13 57 32.579563680   9.051 9.265 9.10   B3V 31 0
9 V* V1154 Ori RR* 06 08 30.3990189360 +13 57 11.486012868 10.94 11.02 10.968 10.86   B9V 22 0
10 NGC 2169 4 * 06 08 32.0231532240 +13 58 00.969233304 7.75 8.239 8.659 8.89   B1V 37 0
11 Cl* Melotte 105 PC 292 * 11 19 24.4670694192 -63 28 05.676353040   15.979 15.364     ~ 4 0
12 Cl* Melotte 105 PC 288 * 11 19 25.1181973848 -63 29 02.197183164   16.344 15.677     ~ 5 0
13 Cl* Melotte 105 PC 287 * 11 19 25.1753362728 -63 28 51.168007164   13.951 13.596     ~ 5 0
14 Cl* Melotte 105 PC 284 * 11 19 25.7388002913 -63 28 09.840069997   16.446 15.749     ~ 4 0
15 Cl* Melotte 105 PC 282 * 11 19 26.1139757208 -63 27 53.495584164   14.568 14.142     ~ 5 0
16 Cl* Melotte 105 PC 277 * 11 19 26.68 -63 28 33.1   16.270 15.506     ~ 2 0
17 Cl* Melotte 105 PC 267 * 11 19 28.0781678712 -63 27 34.212253104   14.242 13.811     ~ 5 0
18 Cl* Melotte 105 PC 263 * 11 19 28.5448270420 -63 28 43.329978215   15.667 15.126     ~ 5 0
19 Cl Melotte 105 78 * 11 19 29.2924775976 -63 29 47.422886892   15.364 14.856     ~ 7 0
20 Cl* Melotte 105 PC 251 * 11 19 29.9351505441 -63 29 02.677171688   15.322 14.819     ~ 5 0
21 Cl* Melotte 105 PC 249 * 11 19 30.0849792555 -63 28 33.564651018   14.538 14.092     ~ 5 0
22 Cl* Melotte 105 PC 248 * 11 19 30.2241696132 -63 28 04.295457454   16.487 15.791     ~ 4 0
23 Cl Melotte 105 14 * 11 19 30.5575584336 -63 28 22.985078988   13.523 13.121     ~ 7 0
24 Cl Melotte 105 13 * 11 19 30.7188710976 -63 27 58.822471584   12.913 12.537     ~ 6 0
25 Cl Melotte 105 8 * 11 19 32.6853062304 -63 29 08.759079024   12.83 12.79     ~ 8 0
26 Cl Melotte 105 76 * 11 19 32.6919209304 -63 29 44.667889908     14.47     ~ 8 0
27 Cl* Melotte 105 PC 220 * 11 19 33.1856379984 -63 28 06.133162908     15.39     ~ 6 0
28 Cl* Melotte 105 PC 218 * 11 19 33.3337650360 -63 27 43.618495212   16.273 15.601     ~ 5 0
29 Cl Melotte 105 49 * 11 19 33.7968362256 -63 28 57.549505944     15.07     ~ 9 0
30 Cl Melotte 105 15 * 11 19 33.8093883000 -63 27 53.670741516     12.83     ~ 7 0
31 Cl Melotte 105 54 * 11 19 34.3970704440 -63 29 12.541541568   15.722 15.121     ~ 8 0
32 Cl Melotte 105 75 * 11 19 34.7911740864 -63 30 07.107290568     13.36     ~ 8 0
33 Cl Melotte 105 74 * 11 19 35.1769981152 -63 29 52.988886636     14.32     ~ 8 0
34 Cl Melotte 105 52 * 11 19 35.4792835272 -63 29 24.756384264     14.68     ~ 8 0
35 Cl Melotte 105 73 * 11 19 35.5256787600 -63 29 43.705943808     14.67     ~ 9 0
36 Cl* Melotte 105 PC 199 * 11 19 35.6194473120 -63 29 15.479329884     15.78     ~ 8 0
37 Cl* Melotte 105 PC 198 * 11 19 35.7773707176 -63 29 18.841077168   15.438 14.772     ~ 7 0
38 Cl Melotte 105 12 * 11 19 35.9214813216 -63 27 42.262931952   14.080 13.652     ~ 8 0
39 Cl Melotte 105 81 * 11 19 36.5187641952 -63 28 51.707348868     14.67     ~ 9 0
40 Cl Melotte 105 82 * 11 19 36.5404357680 -63 28 40.327229424     14.85     ~ 9 0
41 Cl* Melotte 105 PC 186 * 11 19 36.7036402896 -63 27 52.600782924     14.88     ~ 7 0
42 Cl Melotte 105 72 * 11 19 36.93 -63 29 44.2     13.43     ~ 6 0
43 Cl* Melotte 105 PC 181 * 11 19 37.0464715152 -63 28 19.577359092     15.23     ~ 8 0
44 Cl* Melotte 105 PC 180 * 11 19 37.1207959296 -63 29 08.140898868   14.428 14.022     ~ 7 0
45 Cl Melotte 105 71 * 11 19 37.1992648894 -63 29 42.728817672   15.648 15.072     ~ 7 0
46 Cl* Melotte 105 PC 174 * 11 19 37.7254653024 -63 28 03.700202880     15.86     ~ 7 0
47 Cl Melotte 105 46 * 11 19 37.7489464968 -63 29 26.505693996     15.09     ~ 9 0
48 Cl Melotte 105 47 * 11 19 38.2878789888 -63 29 07.399738176     12.45     ~ 10 0
49 Cl Melotte 105 7 * 11 19 38.5924022616 -63 28 23.824912404     12.69     ~ 10 0
50 Cl Melotte 105 70 * 11 19 38.7612855504 -63 29 41.524131264     14.87     ~ 9 0
51 Cl Melotte 105 45 * 11 19 38.9710666918 -63 29 15.129036948     12.75     ~ 9 0
52 Cl* Melotte 105 PC 158 * 11 19 38.9710823232 -63 29 53.743030008     15.23     ~ 8 0
53 Cl Melotte 105 80 * 11 19 38.9868690168 -63 30 01.327728888     14.09     ~ 8 0
54 Cl Melotte 105 35 * 11 19 39.3808313856 -63 28 31.544958866     13.52     ~ 9 0
55 Cl* Melotte 105 PC 151 * 11 19 39.7721842104 -63 28 09.065416512     15.93     ~ 5 0
56 Cl Melotte 105 34 * 11 19 39.9225781056 -63 28 37.520868972     14.26     ~ 9 0
57 Cl Melotte 105 36 * 11 19 40.0054651896 -63 28 26.862459096     14.86     ~ 10 0
58 Cl* Melotte 105 PC 148 * 11 19 40.2754705008 -63 28 58.674071820     15.12     ~ 8 0
59 Cl* Melotte 105 PC 143 * 11 19 40.6417962755 -63 29 22.355006836     14.63     ~ 7 0
60 Cl* Melotte 105 PC 142 * 11 19 40.6705590408 -63 29 09.288526056     15.64     ~ 8 0
61 Cl Melotte 105 69 * 11 19 40.72 -63 29 38.8     11.23     ~ 7 0
62 Cl Melotte 105 68 * 11 19 40.7909389632 -63 29 34.330050240     13.98     ~ 9 0
63 Cl Melotte 105 OpC 11 19 40.8 -63 29 10   9.05 8.5     ~ 76 0
64 Cl Melotte 105 33 * 11 19 41.1148225839 -63 28 31.494125735   13.587 13.131     ~ 9 0
65 Cl* Melotte 105 PC 130 * 11 19 41.2997418216 -63 27 46.799292960   15.386 14.841     ~ 7 0
66 Cl* Melotte 105 PC 131 * 11 19 41.3856921744 -63 29 54.834925740     15.14     ~ 8 0
67 Cl Melotte 105 32 * 11 19 41.4333898904 -63 28 27.407009422   12.363 11.579     ~ 9 0
68 Cl Melotte 105 43 * 11 19 41.5368203616 -63 28 59.153712564   11.87 11.37     ~ 6 0
69 Cl* Melotte 105 PC 127 * 11 19 41.6367475488 -63 29 23.943041016   14.707 14.231     ~ 7 0
70 Cl* Melotte 105 PC 122 * 11 19 41.9072236584 -63 27 29.432601504   15.176 14.161     ~ 2 0
71 Cl Melotte 105 6 * 11 19 42.0552301080 -63 28 33.768288156     14.74     ~ 11 0
72 Cl Melotte 105 86 * 11 19 42.1100420635 -63 29 53.953212783     14.55     ~ 8 0
73 Cl Melotte 105 42 * 11 19 42.1152231720 -63 28 57.823372020     13.98     ~ 9 0
74 Cl Melotte 105 57 * 11 19 42.2924050752 -63 29 14.220200076     15.19     ~ 6 0
75 Cl Melotte 105 37 * 11 19 42.4991237688 -63 28 43.555712664     14.43     ~ 9 0
76 Cl Melotte 105 41 * 11 19 43.2230463933 -63 28 53.722173978   13.557 13.141     ~ 8 0
77 Cl Melotte 105 62 * 11 19 43.2691839936 -63 29 26.018428020     14.20     ~ 9 0
78 Cl Melotte 105 63 * 11 19 43.3309895640 -63 29 22.209450972     14.34     ~ 9 0
79 Cl Melotte 105 64 * 11 19 43.5935646840 -63 29 16.772533656     12.72     ~ 10 0
80 Cl* Melotte 105 PC 97 * 11 19 43.69 -63 29 29.1     15.78     ~ 5 0
81 Cl Melotte 105 40 * 11 19 44.0083068144 -63 28 55.747189704   14.260 13.811     ~ 10 0
82 Cl* Melotte 105 BMP 50 * 11 19 44.0343027168 -63 29 11.445142812     15.44     ~ 8 0
83 Cl* Melotte 105 PC 85 * 11 19 44.3668433880 -63 27 40.984561872   15.323 14.799     ~ 6 0
84 Cl* Melotte 105 PC 84 * 11 19 44.4243081168 -63 27 58.211026560     14.99     ~ 7 0
85 Cl* Melotte 105 PC 80 * 11 19 44.6223779904 -63 28 30.185829696     15.82     ~ 8 0
86 Cl Melotte 105 58 * 11 19 44.6272501176 -63 29 29.662703088     13.45     ~ 8 0
87 Cl Melotte 105 66 * 11 19 44.6570438064 -63 29 11.750077896     14.35     ~ 10 0
88 Cl Melotte 105 91 * 11 19 44.9661684552 -63 29 53.635724844   12.802 12.401     ~ 9 0
89 Cl* Melotte 105 PC 75 * 11 19 45.0116907672 -63 29 21.303475296     15.69     ~ 7 0
90 Cl Melotte 105 65 * 11 19 45.26 -63 29 14.3     14.70     ~ 6 0
91 Cl Melotte 105 5 * 11 19 45.2930264880 -63 28 24.608626968   12.14 11.87     ~ 10 0
92 Cl* Melotte 105 PC 70 * 11 19 45.7088488013 -63 29 00.467006035     15.06     ~ 7 0
93 Cl Melotte 105 60 * 11 19 45.9138382176 -63 29 21.302003688     15.01     ~ 7 0
94 Cl Melotte 105 30 * 11 19 46.2870054072 -63 28 17.279647788     14.34     ~ 10 0
95 Cl Melotte 105 89 * 11 19 46.4425146552 -63 29 57.180334812     13.93     ~ 9 0
96 Cl* Melotte 105 BMP 67 * 11 19 46.4902950048 -63 28 53.144448492     15.50     ~ 8 0
97 Cl Melotte 105 87 * 11 19 46.5175179576 -63 30 06.872113188     13.85     ~ 9 0
98 Cl* Melotte 105 PC 61 * 11 19 46.6394016408 -63 29 49.905718548     15.31     ~ 7 0
99 Cl* Melotte 105 PC 60 * 11 19 46.8682614048 -63 29 30.380716608     15.35     ~ 8 0
100 Cl Melotte 105 29 * 11 19 47.2655085624 -63 28 09.645737304     14.61     ~ 9 0
101 Cl Melotte 105 28 * 11 19 47.3295861897 -63 28 16.317278927     14.23     ~ 9 0
102 Cl Melotte 105 88 * 11 19 48.1952713030 -63 30 04.474540830     14.40     ~ 8 0
103 Cl Melotte 105 4 * 11 19 48.2501136864 -63 28 20.624178036   12.43 12.70     ~ 8 0
104 Cl Melotte 105 96 * 11 19 49.2840020076 -63 29 16.904716682     14.30     ~ 8 0
105 Cl Melotte 105 2 * 11 19 49.5300775464 -63 27 35.059925448   13.909 13.397     ~ 4 0
106 Cl Melotte 105 3 * 11 19 50.1475444908 -63 28 08.885593124   14.213 13.802     ~ 7 0
107 Cl Melotte 105 94 * 11 19 50.6555405424 -63 29 30.995634804   13.836 13.412     ~ 6 0
108 Cl Melotte 105 93 * 11 19 51.5494701864 -63 29 34.105054992   15.540 14.989     ~ 8 0
109 Cl* Melotte 105 PC 19 * 11 19 51.8110102584 -63 27 46.607944716   15.097 14.252     ~ 3 0
110 Cl Melotte 105 23 * 11 19 53.7028256424 -63 30 18.692283960   14.57 14.08     ~ 6 0
111 Cl* Melotte 105 PC 13 * 11 19 53.8883810400 -63 27 37.349230788   16.570 15.844     ~ 5 0
112 Cl* Melotte 105 PC 12 * 11 19 54.6501212112 -63 27 46.656636624   14.926 14.462     ~ 5 0
113 Cl* Melotte 105 PC 8 * 11 19 55.4420885448 -63 28 31.189609128   15.547 14.961     ~ 6 0
114 HD 329271 * 16 57 41.2693000632 -45 58 49.916766828 10.53 10.87 10.65 10.63   B4V 14 0
115 NGC 6250 27 * 16 57 52.4992170720 -45 58 59.687989500   13.23 12.48 12.17   ~ 5 0
116 NGC 6250 7 * 16 57 53.1301079136 -45 56 02.114036268   12.10 11.87     ~ 7 0
117 NGC 6250 OpC 16 57 59 -45 57.1   6.14 5.9     ~ 83 0
118 NGC 6250 12 * 16 58 02.8707588432 -45 55 38.582281416   13.20 12.90     ~ 7 0
119 NGC 6250 28 * 16 58 03.5043356808 -45 59 34.789953552   12.78 12.43 12.24   ~ 8 0
120 Cl* Melotte 105 BMP 45 * ~ ~     15.77     ~ 1 0
121 Cl* NGC 6250 BMP 8 * ~ ~   12.78 12.43     ~ 1 0
122 Cl* NGC 6250 BMP 14 * ~ ~   13.27 12.86     ~ 1 0
123 Cl* Melotte 105 BMP 39 * ~ ~     14.87     ~ 1 0

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