2001A&A...375..989B

Query : 2001A&A...375..989B

2001A&A...375..989B - Astronomy and Astrophysics, volume 375, 989-998 (2001/9-1)

The formation and evolution of binary systems. III. Low-mass binaries in the Praesepe cluster.

BOUVIER J., DUCHENE G., MERMILLIOD J.-C. and SIMON T.

Abstract (from CDS):

With the aim of investigating the binary population of the 700Myr old Praesepe cluster, we have observed 149 G and K-type cluster members using adaptive optics. We detected 26 binary systems with an angular separation ranging from less than 0.08 to 3.3 arcsec (15-600AU). After correcting for detection biases, we derive a binary frequency (BF) in the logP (days) range from 4.4 to 6.9 of 25.3±5.4%, which is similar to that of field G-type dwarfs (23.8%, Duquennoy & Mayor, 1991A&A...248..485D). This result, complemented by similar ones obtained for the 2Myr old star forming cluster IC 348 (Paper II, Duchene et al., 1999A&A...343..831D) and the 120Myr old Pleiades open cluster (Paper I, Bouvier et al., 1997A&A...323..139B), indicates that the fraction of long-period binaries does not significantly evolve over the lifetime of galactic open clusters. We compare the distribution of cluster binaries to the binary populations of star forming regions, most notably Orion and Taurus, to critically review current ideas regarding the binary formation process. We conclude that it is still unclear whether the lower binary fraction observed in young clusters compared to T associations is purely the result of the early dynamical disruption of primordial binaries in dense clusters or whether it reflects intrinsically different modes of star formation in clusters and associations. We also note that if Taurus binaries result from the dynamical decay of small-N protostellar aggregates, one would predict the existence of a yet to be found dispersed population of mostly single substellar objects in the Taurus cloud.

Abstract Copyright: ∼

Journal keyword(s): stars: binaries: close - stars: formation - stars: low-mass, brown dwarfs - galaxy: open clusters and associations: individual: Praesepe, M 44

VizieR on-line data: <Available at CDS (J/A+A/375/989): table1.dat>

CDS comments: Table 1: designation BDA 'NNNN' in column (1) not in SIMBAD. BDA 1460 and BDA 1588 not identified.

Simbad objects: 152

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Number of rows : 152
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 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 833 1
2 IC 348 OpC 03 44 31.7 +32 09 32           ~ 1392 1
3 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3434 0
4 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3074 0
5 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1357 0
6 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2331 0
7 Cl* NGC 2632 JS 12 Ro* 08 32 33.4163186804 +20 04 48.374820784   14.330 13.208     K3.8 32 0
8 Cl* NGC 2632 JC 12 Er* 08 32 49.7198747016 +18 42 06.311666556   14.02 13.04     K4.0 23 0
9 Cl* NGC 2632 JC 13 Ro* 08 32 52.2348005965 +19 58 35.975217994   14.138 13.050     K2.1 33 0
10 Cl* NGC 2632 JC 18 Ro* 08 33 17.6194025602 +19 25 50.488048738   15.078 13.827     K5.7 34 0
11 Cl* NGC 2632 JC 32 Ro* 08 34 03.5531226187 +19 47 43.024768958   14.511 13.362     K4.5 25 0
12 BD+20 2119 SB* 08 35 28.0464246552 +20 11 46.829643468   10.96 10.48     F8 27 0
13 Cl* NGC 2632 JS 103 Ro* 08 35 54.5494164654 +18 08 57.660895075   11.39 10.82     F7.2 29 0
14 Cl* NGC 2632 JS 102 Er* 08 35 56.9481873844 +20 49 34.732649951   12.64 11.85     K0V: 37 0
15 Cl* NGC 2632 JC 54 Ro* 08 35 59.8706597664 +19 31 31.924963380   14.368 13.229     K3.6 32 0
16 Cl* NGC 2632 JC 57 * 08 36 08.6406588772 +18 44 50.956861186   16.33 14.68     K7.4 32 0
17 Cl* NGC 2632 JC 59 Ro* 08 36 16.393080 +19 32 31.29900   12.458 11.573 11.373   G9.7 31 0
18 Cl* NGC 2632 JC 61 Ro* 08 36 22.6882976136 +19 11 29.341769028   13.351 12.418     K2V 36 0
19 Cl* NGC 2632 JS 133 Ro* 08 36 28.3041236717 +20 13 42.932438813   13.521 12.564     K1.3 33 0
20 Cl* NGC 2632 JC 68 Ro* 08 36 36.4184380199 +19 11 06.756523820   16.180 14.719     K7V 36 0
21 Cl* NGC 2632 JS 143 * 08 36 41.8177755299 +20 24 39.950943908   13.91 12.89     K4.1 31 0
22 Cl* NGC 2632 JC 70 * 08 36 42.6958160741 +18 53 42.852930554   15.61 14.27     K5.5 31 0
23 Cl* NGC 2632 JS 146 Ro* 08 36 45.7211129244 +20 07 26.211643713   12.380 11.613     G5.0 42 0
24 Cl* NGC 2632 S 3 * 08 36 46.5740589816 +19 45 44.139618324   12.19 11.39     G 13 0
25 Cl* NGC 2632 JC 71 Ro* 08 36 47.1083805384 +18 34 46.898355360   13.689 12.769     K0.8 31 0
26 Cl* NGC 2632 S 4 Ro* 08 36 48.9611526552 +19 15 26.468169732   11.81 11.33     G5V 34 0
27 Cl* NGC 2632 JC 76 * 08 36 51.6337763832 +19 04 35.045492988   15.52 14.01     K6V 32 0
28 Cl* NGC 2632 JC 78 Ro* 08 36 53.7430810202 +18 29 45.068688735   15.218 13.985     K5.6 25 0
29 Cl* NGC 2632 JC 87 * 08 37 03.7468500479 +18 40 02.493449187   15.45 13.99     K7.4 36 0
30 Cl* NGC 2632 S 12 Ro* 08 37 11.4889240251 +19 48 13.243562709   12.008 11.286     G 58 0
31 Cl* NGC 2632 S 11 SB* 08 37 11.6693226912 +20 17 04.908313392   11.6 11.1     G0V 19 0
32 Cl* NGC 2632 S 14 Ro* 08 37 22.2266341992 +20 10 37.238981570   12.077 11.378     G 49 0
33 Cl* NGC 2632 JC 96 Ro* 08 37 26.3890851044 +19 29 12.830759014   15.111 13.831     K5V 40 0
34 Cl* NGC 2632 JC 102 * 08 37 31.0465610666 +19 06 14.246979723   15.53 13.99     K6V 32 0
35 Cl* NGC 2632 JC 107 Ro* 08 37 36.2416625408 +19 15 54.274378200   14.626 13.481     K4.5 39 0
36 Cl* NGC 2632 JC 109 Ro* 08 37 38.2237612186 +18 28 56.921688552   14.147 13.082     K2.1 25 0
37 Cl* NGC 2632 JC 112 Ro* 08 37 46.4122408968 +19 35 57.469211340   13.252 12.305     K1V 48 0
38 Cl* NGC 2632 S 25 Ro* 08 37 46.6100294766 +19 26 18.046945074   11.243 10.635     F9V 63 0
39 Cl* NGC 2632 S 29 Ro* 08 37 52.0886192625 +19 59 13.858487594   11.952 11.242     G5V 59 0
40 Cl* NGC 2632 JC 118 Er* 08 37 57.0347637421 +19 14 10.371671238   12.632 11.829     G8V 51 0
41 Cl* NGC 2632 JS 211 Ro* 08 38 07.5810781008 +19 59 16.341099072   12.969 12.061     K1.2 37 0
42 Cl* NGC 2632 JS 212 Ro* 08 38 08.0838379200 +20 26 22.339441163   12.432 11.684     G6.5 44 0
43 Cl* NGC 2632 S 38 Ro* 08 38 14.2659589872 +19 21 55.371324528   11.605 10.897     G5V 37 0
44 K2-100 Ro* 08 38 24.3002838928 +20 06 21.828057218   11.085 10.521     G2 102 0
45 Cl* NGC 2632 JS 231 * 08 38 28.1945767502 +21 32 46.020099082   14.70 13.31     K7.4 22 0
46 Cl* NGC 2632 JC 125 Er* 08 38 29.6331271842 +19 51 44.932686238   15.308 14.018     K5.3 41 0
47 Cl* NGC 2632 JC 131 Ro* 08 38 37.2307246836 +19 01 16.062034909   15.001 13.775     K5V 36 0
48 Cl* NGC 2632 JS 247 Ro* 08 38 46.1059354047 +20 34 36.387167234   13.282 12.407     K 38 0
49 Cl* NGC 2632 S 51 SB* 08 38 50.0070052173 +20 04 03.535888479   11.40 10.80     G0V 54 0
50 Cl* NGC 2632 JC 137 * 08 38 53.5380951726 +19 34 16.965928938   15.49 14.07     K6V 45 0
51 Cl* NGC 2632 JS 259 Er* 08 38 57.2252010699 +20 10 53.569177993   15.184 13.924     K6V 44 0
52 Cl* NGC 2632 JC 141 Ro* 08 39 02.2797122304 +19 19 34.473700344   13.306 12.366     K1V 43 0
53 Cl* NGC 2632 JC 144 Ro* 08 39 04.1128930999 +19 31 21.681253411   14.995 13.772     K5V 48 0
54 NGC 2632 4745 Ro* 08 39 10.9668686184 +18 10 33.558758616   10.86 10.27     F7.5 40 0
55 Cl* NGC 2632 JC 152 Ro* 08 39 12.1725466639 +19 06 56.206134373   11.129 10.568     F9V 64 0
56 Cl* NGC 2632 S 70 Ro* 08 39 14.9923040915 +20 12 38.776945040   11.54 10.86 11.19   G5V 46 0
57 Cl* NGC 2632 JC 158 Er* 08 39 21.8520047952 +19 51 40.309840368   13.487 12.517     K0.0 47 0
58 BD+19 2061 Ro* 08 39 24.9776363874 +19 27 33.640292958   11.066 10.461     G0V 76 0
59 Cl* NGC 2632 KW 184 Ro* 08 39 28.5832805843 +19 28 25.139885585   12.519 11.606     K0V 55 0
60 Cl* NGC 2632 JC 163 Er* 08 39 29.4001344297 +19 47 11.779463562   13.64 12.64     K3.0 40 0
61 BD+20 2146 Ro* 08 39 30.4201839168 +20 04 08.581687860   10.892 10.260     F8V 51 0
62 Cl* NGC 2632 JS 299 * 08 39 34.4495334528 +20 57 20.643546348   14.59 13.45     K4.7 18 0
63 Cl* NGC 2632 S 79 Ro* 08 39 35.5396599646 +18 52 36.750952846   11.282 10.695     G 49 0
64 Cl* NGC 2632 JC 166 * 08 39 36.4313650811 +19 15 37.799301101   15.73 14.29     K7V 41 0
65 Cl* NGC 2632 JC 168 Ro* 08 39 38.3646283704 +19 26 27.074546808   13.627 12.648     K3V 46 0
66 Cl* NGC 2632 S 83 Ro* 08 39 45.7489350539 +19 22 01.145101156   11.257 10.640     G1V 77 0
67 Cl* NGC 2632 JC 172 Ro* 08 39 47.0678933237 +19 49 39.440461992   13.724 12.724     K2.6 45 0
68 Cl* NGC 2632 KW 213 Er* 08 39 50.8363831685 +19 33 02.073309982   12.61 11.84     G6.1 43 0
69 V* TX Cnc EB* 08 40 01.7039106928 +18 59 59.421095623   10.71 9.97 9.88 9.339 G0-G1V 238 0
70 Cl* NGC 2632 JC 184 Er* 08 40 04.1612039856 +19 47 04.006734756   12.899 12.030     K0V 40 0
71 Cl* NGC 2632 S 104 Ro* 08 40 06.3564902093 +19 18 26.507970736   11.761 10.980     K4 52 0
72 HD 73639 * 08 40 07.7080995408 +21 03 45.833741172   9.71 9.32     F2.3 30 0
73 Cl* NGC 2632 JC 190 Ro* 08 40 09.6806371620 +19 37 17.099047170   12.808 11.973     G9V 59 0
74 NGC 2632 OpC 08 40 13.0 +19 37 16           ~ 1564 0
75 K2-102 Ro* 08 40 13.4534275080 +19 46 43.709186244   14.318 13.200     K3V 60 0
76 Cl* NGC 2632 JC 197 * 08 40 15.5030735288 +19 27 30.996811802   15.24 13.91     K6V 38 0
77 BD+20 2162 Ro* 08 40 17.623704 +19 47 15.23904   10.551 9.941 9.873   F8V 42 0
78 Cl* NGC 2632 WJJP 607 Ro* 08 40 18.937848 +20 11 30.59232   14.104 12.912 12.535   K4V 20 0
79 Cl* NGC 2632 JC 201 ** 08 40 21.337152 +19 10 54.38100   15.52 14.11 13.96   K6V 21 0
80 Cl* NGC 2632 S 118 Ro* 08 40 22.7158598352 +19 27 53.156521224   11.303 10.673     F7.2 58 0
81 Cl* NGC 2632 S 119 SB* 08 40 23.2706451960 +19 40 23.704368132   10.96 10.37     G0V 32 0
82 Cl* NGC 2632 JC 205 Ro* 08 40 24.4036071782 +18 27 13.742079127   12.24 11.79     G8V 28 0
83 Cl* NGC 2632 JC 208 Ro* 08 40 26.2476910224 +19 13 09.905791548   13.899 12.875     K3V 35 0
84 Cl* NGC 2632 S 128 Ro* 08 40 27.4367428022 +19 16 40.920833107   11.822 11.148     G3V 57 0
85 Cl* NGC 2632 S 126 Ro* 08 40 28.6411452639 +20 18 44.794197158   12.432 11.604     K 34 0
86 Cl* NGC 2632 S 129 Ro* 08 40 31.8436933055 +20 12 06.018714052   12.201 11.472     G5V 53 0
87 Cl* NGC 2632 JC 216 Er* 08 40 33.5986015948 +18 40 28.168343261   12.335 11.596     G5.4 39 0
88 Cl* NGC 2632 JC 219 * 08 40 39.5219214849 +18 49 05.795171539   14.45 14.11     K7.0 36 0
89 Cl* NGC 2632 S 134 Ro* 08 40 39.9178822906 +19 40 09.192415392   11.580 10.859     G2V 55 0
90 Cl* NGC 2632 S 137 SB* 08 40 41.8979189208 +19 13 25.440770028   11.205 10.567     G0V 39 0
91 Cl* NGC 2632 S 138 Ro* 08 40 42.4813583883 +19 33 57.623817270   12.063 11.331     G4V 72 0
92 Cl* NGC 2632 JC 221 Ro* 08 40 44.3943102346 +18 39 23.476197403   13.917 12.933     K3.1 26 0
93 Cl* NGC 2632 S 145 Er* 08 40 47.6138605389 +18 54 11.925904963   12.159 11.426     G6.8 49 0
94 Cl* NGC 2632 S 143 Ro* 08 40 47.9832672792 +19 39 32.161833069   11.757 10.991     G2V 54 0
95 Cl* NGC 2632 S 144 Ro* 08 40 48.3236450266 +19 55 18.904927804   11.707 11.012     G2V 65 0
96 Cl* NGC 2632 JS 395 * 08 40 54.8743024386 +19 56 06.637377056   12.95 12.09     K1V 43 0
97 Cl* NGC 2632 JC 232 Er* 08 40 58.6550184240 +18 40 30.101511936   14.936 13.723     K5.8 21 0
98 Cl* NGC 2632 JC 233 Ro* 08 40 59.6745181296 +18 22 04.368417816   12.14 11.58 11.74   K2.2 21 0
99 Cl* NGC 2632 JS 404 * 08 41 02.6230647467 +20 27 27.764231749   13.24 12.35     G8.5 38 0
100 Cl* NGC 2632 JC 234 Ro* 08 41 07.2471239784 +19 26 48.895335348   13.370 12.416     K1V 43 0
101 BD+19 2076 SB* 08 41 07.363272 +19 04 16.38300     10.161 10.049   F7V 46 0
102 BD+19 2077 SB* 08 41 09.6035844072 +19 51 18.661416948   11.361 10.631     G7.6 54 0
103 Cl* NGC 2632 JS 409 * 08 41 11.0531090904 +20 49 57.893568096   12.65 11.92     K0V: 12 0
104 Cl* NGC 2632 JS 420 Er* 08 41 15.4172672525 +20 02 15.914868789   15.563 14.230     K6V 45 0
105 Cl* NGC 2632 JC 249 Ro* 08 41 19.9236073803 +19 38 04.706794951   14.751 13.555     K5V 39 0
106 K2-101 Ro* 08 41 22.5783027954 +18 56 01.947224876   13.970 12.957     K3V 67 0
107 BD+20 2181 Ro* 08 41 25.8429243867 +19 56 36.848107538   11.342 10.687     G0V 74 0
108 Cl* NGC 2632 S 169 Ro* 08 41 28.6832242439 +19 44 48.128029157   11.605 10.933     G1V 47 0
109 Cl* NGC 2632 KW 401 Er* 08 41 30.7065278468 +18 52 18.719809334   13.649 12.727     K3.1 39 0
110 Cl* NGC 2632 JC 258 Ro* 08 41 31.5377420083 +18 30 02.228589704   10.89 10.13     F5 37 0
111 Cl* NGC 2632 JC 260 * 08 41 37.4079597490 +19 31 13.930049854   14.84 13.60     K5V 40 0
112 Cl* NGC 2632 JC 263 Er* 08 41 43.6896963643 +19 57 43.687711161   13.264 12.333     K1V 47 0
113 BD+20 2184 Ro* 08 41 43.8160475073 +20 13 36.752729096   10.988 10.431     G2 91 1
114 Cl* NGC 2632 JC 268 Ro* 08 41 48.1903422249 +19 27 31.155070896   14.852 13.644     K5V 31 0
115 Cl* NGC 2632 JC 269 Er* 08 41 49.3504288854 +19 11 47.017776805   15.864 14.466     K8V 36 0
116 Cl* NGC 2632 JS 461 * 08 41 51.9884907672 +20 10 01.150897548   12.89 12.04     K0.0 39 0
117 Cl* NGC 2632 S 186 Pu* 08 41 55.8711349195 +19 41 22.847148847   11.718 11.006 10.796   G2V 52 0
118 Cl* NGC 2632 WJJP 792 Ro* 08 41 58.8414616699 +20 06 27.092947108   14.279 13.160     K4V 38 0
119 Cl* NGC 2632 JS 465 Ro* 08 41 59.2433467618 +20 55 07.164217236   11.83 11.43     G5V: 33 0
120 Cl* NGC 2632 JC 278 Ro* 08 42 11.4988704792 +19 16 37.237499940   13.060 12.143     K1V 74 1
121 Cl* NGC 2632 JC 279 * 08 42 12.3421568807 +19 12 48.651806863   14.96 13.78     K6V 41 0
122 Cl* NGC 2632 JC 280 * 08 42 12.8538981497 +19 16 03.856676908   14.65 13.52     K5V 30 0
123 Cl* NGC 2632 JS 478 Ro* 08 42 16.6479723192 +20 05 32.523014113   15.498 14.187     K7V 39 0
124 Cl* NGC 2632 JC 282 Ro* 08 42 20.0858364447 +19 09 05.675980619   14.673 13.486     K5V 44 0
125 Cl* NGC 2632 S 197 Er* 08 42 32.2554589085 +19 23 46.258287993   11.656 10.954     G2V 48 0
126 Cl* NGC 2632 JS 493 Er* 08 42 37.0003981767 +20 08 31.820910601   15.201 13.961     K6V 38 0
127 Cl* NGC 2632 JS 496 Ro* 08 42 40.2090814368 +19 07 59.111896584   12.976 12.111     K0.1 39 0
128 Cl* NGC 2632 JS 497 * 08 42 42.0730749125 +19 17 32.305764250   16.00 14.52     K7.3 30 0
129 Cl* NGC 2632 S 203 Ro* 08 43 00.5482617645 +20 20 16.103893959   12.147 11.384     G5V 45 0
130 Cl* NGC 2632 JS 511 * 08 43 02.4161179069 +19 10 03.235303883   12.98 12.13     G7.5 38 0
131 BD+19 2087 SB* 08 43 05.9392105920 +19 26 15.288202896   10.52 9.93     F8V 45 0
132 Cl* NGC 2632 JS 516 Er* 08 43 06.7066919424 +19 47 29.693210026   14.85 13.67     K5V 36 0
133 HD 74186 SB* 08 43 07.0511295816 +19 04 06.083872140   10.09 9.56     F8V 50 0
134 Cl* NGC 2632 WJJP 899 * 08 43 08.2271513908 +19 42 47.541967294   14.53 13.32     K4V 31 0
135 Cl* NGC 2632 S 209 Ro* 08 43 10.7666575438 +19 31 34.634872830   12.583 11.769     G6.8 50 0
136 Cl* NGC 2632 JS 526 Ro* 08 43 15.2320993762 +20 03 56.021239107   14.614 13.447     K5V 28 0
137 NSV 4211 Er* 08 43 17.8404959552 +20 30 37.428349689   12.610 11.785     K1.0 31 0
138 Cl* NGC 2632 S 213 Ro* 08 43 20.1954899736 +19 46 08.530884588   11.415 10.756     G0V 43 0
139 BD+22 1980 SB* 08 43 22.5712415206 +21 40 18.098313041   11.24 10.52     G3.7 42 0
140 Cl* NGC 2632 JS 537 Ro* 08 43 32.3863881872 +19 44 37.762422493   13.246 12.309     K0V: 41 0
141 Cl* NGC 2632 JS 547 Ro* 08 43 43.5581083377 +19 04 33.136296875   14.488 13.416     K3.8 34 0
142 Cl* NGC 2632 JS 556 Ro* 08 43 56.7235919832 +19 43 32.290129128   14.376 13.243     K4V 25 0
143 Cl* NGC 2632 JS 561 Er* 08 44 13.2397738057 +18 49 11.429016165   15.431 14.181     K7.1 27 0
144 Cl* NGC 2632 JS 566 Ro* 08 44 26.5291075591 +19 47 35.934015552   15.466 14.125     K7.2 26 0
145 BD+20 2201 SB* 08 44 37.0335825691 +19 42 39.137636008   11.06 10.43     G0 34 0
146 Cl* NGC 2632 JS 572 * 08 44 40.7537404136 +20 11 37.113596379   15.68 14.24     K7.5 28 0
147 BD+20 2204 SB* 08 45 04.2274842409 +20 21 27.868771716   10.865 10.296     F5 39 0
148 Cl* NGC 2632 ANM 1471 ** 08 45 13.097088 +19 41 12.79824   11.602 10.848 10.726   G5 26 0
149 BD+22 1985 Ro* 08 45 27.9427195505 +21 39 12.920560001   11.16 10.52     F6.6 48 0
150 Cl* NGC 2632 JS 638 Ro* 08 46 47.3215888426 +19 38 41.023743473   11.303 10.701     G8V: 35 0
151 V* FV Cnc CV* 08 48 01.7386823727 +18 40 37.643532001   11.12 10.60     G4 55 0
152 Cl* NGC 2632 JS 660 Ro* 08 48 27.8391788767 +18 20 43.894506999   12.05 11.34     G5.3 30 0

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