1999A&A...346...67K

Query : 1999A&A...346...67K

1999A&A...346...67K - Astronomy and Astrophysics, volume 34667-81 (1999/6-1)

Statistics of binaries in the Pleiades cluster.

KAEHLER H.

Abstract (from CDS):

We present a statistical analysis of binaries in galactic clusters, based on photometric properties. Synthetic clusters are used to solve the deconvolution problem. If the colour-magnitude relation for single stars is given and if triple stars are treated as binaries, the distribution of systems in a colour-magnitude diagram (CMD) can be used to determine cluster properties. They include the maximum number of single stars N1max which is compatible with the distribution of systems, a standard deviation σ (describing the scatter of stars on the main sequence), a critical mass ratio qc, and the mass ratio distribution in the case of N1=N1max. In the general case (N1≤N1max) the mass ratio distribution can be determined for q>qc, and in favourable cases (if N1 is sufficiently large) for all mass ratios. A first application concerns the Pleiades cluster in the colour range 0.2≤B-V<0.98. The concentration of systems near the main sequence in the CMD is used to derive an approximation for the colour-magnitude relation. A small positive number c is involved as a parameter. The mass ratio distribution depends sensitively on c and increases towards small mass ratios, at least up to q≃0.5 and probably up to q≃0.3. The distribution is bimodal, with a peak at q=1. Photometric arguments show that c≲0.02. A binary frequency of 60-70% as expected from cluster simulations (Kroupa, 1995MNRAS.277.1522K) requires c≲0.03. An adjustment of two parameters (c=0.02 and a 70% binary frequency) is sufficient to reproduce the mass ratio distribution for binaries in the galactic field. This suggests that the mass ratio distribution in the Pleiades is similar to the distribution in the field, in accordance with a conjecture of Bouvier et al. (1997A&A...323..139B, BRN).

Abstract Copyright: ∼

Journal keyword(s): methods: data analysis - methods: statistical - techniques: photometric - stars: binaries: general - Galaxy: open clusters and associations: individual: Pleiades

Simbad objects: 141

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Number of rows : 141
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 BD+23 472 PM* 03 34 07.3108208088 +24 20 40.002743148 10.06 10.043 9.556 9.06 8.945 F5 68 0
2 HD 22146 * 03 34 58.6647678360 +23 31 48.529973496   9.19 8.89     A5 43 0
3 HD 22444 SB* 03 37 24.0530123016 +22 21 03.581533656 9.76 9.725 9.223 8.78 8.614 G0 38 0
4 V* V1225 Tau gD* 03 39 51.1603741248 +25 11 41.470929312   9.156 8.842 8.72   F1IV 42 0
5 HD 22887 PM* 03 41 22.9672095647 +23 29 12.970598115   9.69 9.27 9.26   F5 68 0
6 HD 22977 * 03 42 04.7237775216 +22 51 30.804415524   9.55 9.16     F8 60 0
7 BD+21 504 PM* 03 42 23.9947567377 +21 28 24.566061110 10.44 10.371 9.841 9.38 9.213 G0 72 0
8 HD 23061 * 03 42 55.1141189191 +24 29 35.049617418 9.96 9.90 9.46 9.01 8.90 F5V 114 0
9 V* V810 Tau BY* 03 43 02.9441671032 +24 40 11.149283892 15.149 12.97 12.03   10.98 G8 105 0
10 Cl Melotte 22 102 Er* 03 43 24.5389577065 +23 13 33.337058447 11.39 11.2 10.7 9.90 9.68 G1V 63 0
11 HD 23133 ** 03 43 29.285448 +22 44 05.27424       9.00   F5 18 0
12 Cl Melotte 22 120 Y*O 03 43 31.9532712265 +23 40 26.598684947 11.949 11.496 10.855 10.717   G1 91 0
13 2MASS J03433440+2345429 Y*O 03 43 34.4113941165 +23 45 42.922748924 12.914 12.35 11.47     G8V 70 0
14 V* V963 Tau BY* 03 43 37.7294586035 +23 32 09.560933897 11.82 11.4 10.6     G5V 95 0
15 HD 23157 ** 03 43 41.5325750160 +23 38 56.977320660   8.25 7.95     A5V 99 0
16 HD 23158 SB* 03 43 42.8773509420 +23 35 41.208537362   10.04 9.58     F5V 88 0
17 V* V624 Tau dS* 03 43 43.2412431936 +24 22 28.445642868   8.49 8.22     A7III 140 0
18 HD 23154 * 03 43 46.6739040816 +25 24 48.061104588   10.42 9.93     G 10 0
19 Cl Melotte 22 186 * 03 43 47.5129583016 +23 12 41.646939444   11.4 10.5     ~ 24 0
20 V* V1271 Tau RS* 03 43 48.3323982308 +25 00 15.795725924   12.47 11.62 11.69   ~ 92 0
21 Cl Melotte 22 173 Y*O 03 43 48.4127620965 +25 11 24.246493946   12.2 10.7     K0V 76 0
22 Cl Melotte 22 193 Er* 03 43 50.7027203376 +24 14 50.970564132 12.46 12.10 11.29     G3 83 0
23 V* V847 Tau Er* 03 43 51.7488469023 +24 14 16.175469511 20.566         M4 56 0
24 HD 23195 SB* 03 43 58.8034552580 +23 52 57.813467374   10.19 9.55     F5V 108 0
25 V* V1187 Tau dS* 03 44 00.2690335032 +24 33 25.193571588   8.28 8.07     A4IV 156 0
26 Cl Melotte 22 248 Y*O 03 44 00.5947579976 +23 32 38.194384321   12.0 11.2     G4V 91 0
27 V* V1272 Tau BY* 03 44 03.5401148521 +24 30 15.284314309   11.8 10.762   9.933 G1V 111 0
28 Cl Melotte 22 250 Y*O 03 44 04.2464661604 +24 59 23.415055928   11.4 10.7     G2 74 0
29 V* V1168 Tau BY* 03 44 04.8395264080 +24 16 31.874754111   12.42 11.54     G4 108 0
30 V* V966 Tau BY* 03 44 11.2145003449 +23 22 45.575870257   12.30 11.46     G8e 140 0
31 BD+23 501A TT? 03 44 13.0605044640 +24 01 50.951286804   11.92 11.12 11.25   ~ 82 0
32 V* V1169 Tau BY* 03 44 13.9194344229 +24 46 45.826637312   11.50 10.80     G0 112 0
33 BD+23 502 Er* 03 44 14.655048 +24 06 06.77520   11.41 10.59 10.13   G3IV 62 0
34 V* V1038 Tau BY* 03 44 20.0898026175 +24 47 46.205031064   11.2 10.4 10.3   G1-2V 162 0
35 V* V1084 Tau RS* 03 44 20.5097544453 +24 46 22.305261833   11.92 11.04 10.7   G5V 92 0
36 HD 23247 PM* 03 44 23.5411594200 +24 07 57.471196908   9.564 9.111 9.23   F2V 95 0
37 HD 23246 PM* 03 44 25.7165880744 +24 23 40.975909332   8.44 8.18     A8V 94 0
38 V* V1170 Tau BY* 03 44 26.2759113581 +24 35 22.939007310 14.435 12.288 11.461   10.520 G9 113 0
39 HD 23269 Er* 03 44 40.7575766283 +24 49 06.729381349   10.4 10.0     F8V 133 0
40 2MASS J03444398+2413523 Y*O 03 44 43.9834004370 +24 13 52.355069334   12.25 11.40 11.31   G8V 76 0
41 HD 23289 * 03 44 51.2354703456 +23 16 08.116761576   9.33 9.01   8.37 F3V 135 0
42 2MASS J03445383+2355165 Y*O 03 44 53.8394313804 +23 55 16.634498368   11.61 10.81   9.87 GIV 88 0
43 2MASS J03445639+2425574 Y*O 03 44 56.3956556693 +24 25 57.395257211   11.01 10.38   9.69 F8 108 0
44 HD 23312 * 03 44 58.9224442064 +22 01 56.827147555 10.00 9.946 9.449 9.05 8.880 F5 73 0
45 2MASS J03450326+2350219 Y*O 03 45 03.2767265409 +23 50 21.885896079   12.87 11.93   10.97 K2V 108 0
46 2MASS J03450400+2515282 Y*O 03 45 04.0131579092 +25 15 28.255253589   11.4 10.7   9.97 ~ 86 0
47 HD 23326 PM* 03 45 05.2834818672 +23 42 09.619748244 9.632 9.34 8.99   8.49 F3V 128 0
48 HD 23325 Pe* 03 45 06.5388153048 +24 15 48.650236236   8.96 8.70   8.16 kA6hA9mF1(IV) 112 0
49 HD 23327 PM* 03 45 07.4318639736 +22 17 36.757330044   9.57 9.19     F5 15 0
50 2MASS J03451534+2517221 Y*O 03 45 15.3524954712 +25 17 22.129906236   11.8 11.3   10.35 G8V 70 0
51 HD 23351 SB* 03 45 20.8608183282 +24 55 19.454554726   9.46 9.03   8.43 F3V 103 0
52 HD 23352 * 03 45 24.1269375603 +24 53 09.534285718   10.3 9.8   9.05 F5V 104 0
53 Cl Melotte 22 659 Y*O 03 45 25.9720109496 +23 25 48.655887420 13.949 13.214 12.231   11.043 G4V 55 0
54 HD 23361 PM* 03 45 26.1389258592 +24 02 06.584058672   8.24 8.02   7.78 A3V 94 0
55 HD 23375 dS* 03 45 34.4631249960 +24 27 47.922382692   8.94 8.58   8.33 F0V 113 0
56 V* V1085 Tau BY* 03 45 35.3982230827 +24 04 59.563296540   10.73 11.92 10.04 9.37 F2 103 0
57 V* V855 Tau Y*O 03 45 40.1782648711 +24 37 38.007136109   10.6 9.9   9.05 F9V 108 1
58 BD+23 513 SB* 03 45 41.4028309968 +24 17 18.960639396 10.08 9.97 9.45 9.31 8.79 F5V 69 1
59 BD+23 514 Y*O 03 45 41.8552074456 +24 25 53.455915128   12.08 11.36 11.15 10.42 G5 85 0
60 V* V969 Tau BY* 03 45 42.1185203606 +24 54 21.622880032   10.18 9.56   8.82 G3 145 1
61 Cl Melotte 22 761 Y*O 03 45 44.4132583283 +24 13 13.134939048   11.22 10.55   9.77 G2V 93 0
62 HD 23430 * 03 45 59.1396677304 +25 23 54.931179624   8.25 8.05     A0 81 0
63 BD+22 548 Y*O 03 46 10.0423522944 +23 20 24.045862524   10.8 10.18   9.46 G0 91 0
64 2MASS J03461174+2437203 Y*O 03 46 11.7541432886 +24 37 20.343875204   12.489 11.620     G8V 94 0
65 HD 23479 Er* 03 46 16.0035787584 +24 11 23.722659996   8.91 8.80 8.72 7.57 A7V 120 0
66 BD+23 521 * 03 46 17.9919005844 +23 29 11.939258173 11.984 11.4 10.6   9.59 F8V 71 0
67 Cl Melotte 22 992 * 03 46 19.6131508776 +23 31 17.145217128   13.23 12.26     F8IV 9 0
68 V* V1045 Tau BY* 03 46 22.6697529823 +24 34 12.539066238   11.4 10.8   9.71 F8 116 0
69 HD 282952 Y*O 03 46 27.3523093248 +25 08 07.920713904   11.3 10.9     F9 91 0
70 V* V1171 Tau BY* 03 46 28.4126681681 +24 26 02.158117224   11.85 11.10 10.5 10.26 G5V 108 1
71 HD 23512 PM* 03 46 34.1921924832 +23 37 26.494987584 8.72 8.44 8.09 7.79 7.49 A2V 158 0
72 HD 23488 SB* 03 46 34.8316416624 +25 50 37.898905920   9.03 8.72     kA4hA6mA8 38 0
73 HD 282975 Y*O 03 46 37.6798897555 +23 47 15.790663787 11.533 10.8 10.0   9.43 G2V+G2V 112 0
74 2MASS J03463777+2444517 Y*O 03 46 37.7719499679 +24 44 51.681848077   12.80 11.92   10.89 K0V 88 0
75 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
76 HD 23514 * 03 46 38.3922026460 +22 55 11.199934340 9.95 9.93 9.43 8.96 8.84 F5V 157 0
77 HD 282954 Em* 03 46 38.7739870144 +24 57 34.724064803   10.9 10.27   9.55 F9.5V 120 0
78 HD 23511 PM* 03 46 39.3335012425 +24 06 11.531508492   9.75 9.28   8.75 F5V 144 0
79 V* V814 Tau BY* 03 46 39.3864483531 +24 01 46.867039992   13.04 12.13   11.24 K3V 122 0
80 HD 23513 PM* 03 46 39.9969863424 +23 06 37.194884441 9.85 9.91 9.40 8.97 8.83 F5V 115 0
81 BD+22 552 Y*O 03 46 47.0620046173 +22 54 52.487006394   11.3 10.8   9.77 F8 98 0
82 BD+22 553 * 03 46 50.5364463984 +23 14 21.046709616   10.48 9.97   9.27 F6V 88 0
83 2MASS J03465326+2252513 Y*O 03 46 53.2623075792 +22 52 51.359825208   12.62 11.74     G8V 60 0
84 BD+23 527 Er* 03 46 53.7464379963 +23 35 00.796614675 11.607 11.1 10.6   9.85 G0V 119 0
85 V* V1046 Tau PM* 03 46 54.9177933516 +24 47 46.825737223   11.5 10.6   9.79 G5 106 0
86 Cl Melotte 22 1275 Y*O 03 47 01.4202225461 +23 29 41.789599511 13.035 12.330 11.572 11.297 10.58 K0V 105 0
87 V* V534 Tau dS* 03 47 03.5551874064 +24 49 11.812255356   8.65 8.30   7.83 A9V 120 0
88 V* V1210 Tau gD* 03 47 04.2131220000 +23 59 42.773483436   8.67 8.38   8.02 F0V 138 0
89 HD 23584 * 03 47 10.0537991349 +24 16 35.945010583   9.99 9.58   8.92 F6V 102 0
90 HD 23608 SB* 03 47 16.5764110218 +24 07 41.906506002   9.15 8.72   8.09 F3V 92 0
91 V* V647 Tau dS* 03 47 19.3458598776 +24 08 20.815318464   8.51 8.26   7.97 A7Vs 182 0
92 HD 23610 SB* 03 47 22.8997617600 +22 55 19.586180208   8.41 8.20   7.83 A3/7 78 0
93 V* V1228 Tau dS* 03 47 24.0779661960 +24 35 18.510029196   7.89 7.71 7.5 7.45 A4V 100 0
94 HD 282967 Y*O 03 47 40.4453488845 +24 21 52.409176663   11.12 10.48   9.79 G5 113 0
95 HD 23664 * 03 47 46.8353490240 +25 23 08.508918516   8.55 8.30     A2 70 0
96 2MASS J03474811+2313053 Y*O 03 47 48.1174675991 +23 13 05.115153695   11.9 11.2   10.33 G7V 100 0
97 HD 282973 PM* 03 47 52.5260476469 +23 56 28.428947463   10.41 9.87   9.24 G0 120 0
98 HD 23713 ** 03 48 07.1684166120 +24 08 31.430682996   9.86 9.43 9.32 8.64 F7V 111 0
99 HD 23733 SB* 03 48 13.5574497288 +24 19 06.222596880   8.73 8.41   7.83 A9V 104 0
100 HD 23732 * 03 48 16.8727819416 +25 12 54.442464768 9.67 9.62 9.21 8.70 8.55 F4V 106 0
101 2MASS J03481705+2337435 * 03 48 17.0465936208 +23 37 43.573249956           F9V 24 0
102 HD 282972 Y*O 03 48 17.1159771902 +23 53 25.269864637   11.02 12.08   9.72 F9 100 0
103 HD 282958 Y*O 03 48 17.6915716635 +25 02 52.259199818   11.6 11.3   10.15 G5V 109 0
104 HD 282971 PM* 03 48 26.1648308529 +24 02 54.196833236   10.6 10.2   9.39 F8 126 0
105 2MASS J03483451+2326053 Y*O 03 48 34.5103551864 +23 26 05.248800743   11.2 10.7   9.66 G0V 103 0
106 HD 23778 ** 03 48 34.7984058048 +24 10 52.199121955   9.54 9.05 9.16 8.45 F4V 77 0
107 HD 23792 PM* 03 48 39.3262268880 +21 55 29.861697144   8.78 8.41     F0 37 0
108 HD 23791 * 03 48 43.8952872624 +23 15 35.332233840   8.64 8.38   8.05 kA7hA8mF0IV 109 0
109 Cl Melotte 22 2027 Y*O 03 48 48.9539567589 +24 16 02.586202857   11.77 10.91   10.01 G2V 85 0
110 Cl Melotte 22 2106 Y*O 03 48 58.4864992200 +23 12 04.243870368   12.39 11.53   10.59 K0V 61 0
111 Cl Melotte 22 2126 Y*O 03 49 02.3336482213 +23 15 08.771656641   12.50 11.64   10.80 K0V 88 0
112 V* V1282 Tau RS* 03 49 06.1083396732 +23 46 52.469922436   11.63 10.803 9.8 9.831 G7IV 110 0
113 HD 282965 SB* 03 49 11.7330709952 +24 38 11.688977570 11.15 11.2 10.6 9.88 9.74 F9V 85 0
114 HD 23863 * 03 49 12.1871337168 +23 53 12.438137328   8.36 8.15   7.88 A7Vn 124 0
115 V* V1089 Tau BY* 03 49 24.0523828704 +23 50 21.300884088   12.13 11.35     ~ 66 0
116 HD 282960 ** 03 49 25.704576 +24 56 15.44820   11.743 10.887 10.639 10.00 G2 56 0
117 Cl Melotte 22 2311 Y*O 03 49 28.7425971397 +23 42 43.885888515   12.19 11.36   10.50 ~ 92 0
118 HD 23912 Pe* 03 49 32.7250650456 +23 22 49.444085604   9.55 9.14   8.63 F4Vn 106 1
119 V* V1090 Tau BY* 03 49 33.1190204321 +23 47 43.404601495   11.58 10.87   10.19 G4V 95 0
120 Cl Melotte 22 2366 Y*O 03 49 36.5439342094 +24 17 45.829531885   12.35 11.53 10.88 10.63 G2 76 0
121 Cl Melotte 22 2406 Y*O 03 49 39.4016007216 +23 17 24.383128632   11.86 11.10     G1 73 0
122 HD 23924 * 03 49 40.9233801600 +23 20 29.652869940   8.32 8.13   7.91 A5VkA7mA7 124 0
123 Cl Melotte 22 2462 Y*O 03 49 50.3589700206 +23 42 20.103084756   12.45 11.61 11.44 10.63 ~ 107 0
124 HD 23935 * 03 49 52.9157015016 +25 38 50.822160792 10.16 10.086 9.579 9.11 8.945 F8 53 0
125 BD+22 574 * 03 49 56.4960771432 +23 13 07.044335076   10.79 10.2   9.58 F8 98 1
126 HD 23975 * 03 50 17.6727280290 +25 22 46.443238418 10.17 10.146 9.733 9.2 9.120 G0 88 0
127 Cl Melotte 22 2644 Y*O 03 50 20.9059818720 +24 28 00.290041788   11.76 11.03   10.32 ~ 78 0
128 Cl Melotte 22 2665 Y*O 03 50 21.3045676424 +23 05 46.866252770   12.19 11.36     ~ 64 0
129 V* V1175 Tau BY* 03 50 40.0721202291 +23 55 58.950949335   10.9 10.5   9.61 F9 110 0
130 V* V1176 Tau Er* 03 50 54.3588780269 +23 50 05.237700840   12.43 11.48 10.99 10.47 K2 77 0
131 Cl Melotte 22 2880 Y*O 03 50 55.0845587305 +24 11 50.781812049   12.61 11.75     ~ 66 0
132 HD 24087 * 03 51 07.5825794400 +25 24 30.392488728   10.01 9.50     F8 13 0
133 HD 24132 * 03 51 27.2143557432 +24 31 07.142738880 9.3 9.24 8.84 8.49 8.40 F2Vn 103 0
134 V* V1054 Tau Y*O 03 51 39.2751951048 +24 32 56.043000960   13.15 12.15 12.30 11.06 ~ 60 1
135 Cl Melotte 22 3097 Y*O 03 51 40.4461647864 +24 58 59.408642388   11.71 10.97   10.12 ~ 74 0
136 HD 24194 PM* 03 51 56.8624256040 +23 54 07.044904908   10.61 10.07   9.38 G0V 97 0
137 HD 24302 * 03 52 53.4784193568 +24 42 56.632627296 9.91 9.90 9.48 9.01 8.7 F8 80 0
138 HD 24665 * 03 56 01.4323532040 +23 07 34.803409764   9.730 9.123   8.478 F5 17 0
139 HD 24655 PM* 03 56 03.8788158192 +22 13 37.093787508   9.50 9.08     F8 31 0
140 HD 283132 Em* 03 56 12.7898953440 +25 45 43.457837724   11.118 10.446   9.686 G0 23 0
141 HD 24711 * 03 56 28.1224880688 +23 09 00.994817844   8.59 8.33     A0 60 0

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