2006A&A...445..545P

Query : 2006A&A...445..545P

2006A&A...445..545P - Astronomy and Astrophysics, volume 445545-565 (2006/1-2)

Revisiting the population of Galactic open clusters.

PISKUNOV A.E., KHARCHENKO N.V., ROESER S., SCHILBACH E. and SCHOLZ R.-D.

Abstract (from CDS):

We present results of a study of the galactic open cluster population based on the all-sky catalogue ASCC-2.5 (I/280A) compiled from Tycho-2, Hipparcos and other catalogues. The sample of optical clusters from ASCC-2.5 is complete up to about 850pc from the Sun. The symmetry plane of the clusters' distribution is determined to be at Z0=-22±4pc, and the scale height of open clusters is only 56±3pc. The total surface density and volume density in the symmetry plane are Σ= 114kpc–2 and D(Z0)=1015kpc–3, respectively. We find the total number of open clusters in the Galactic disk to be of order of 105 at present. Fluctuations in the spatial and velocity distributions are attributed to the existence of four open cluster complexes (OCCs) of different ages containing up to a few tens of clusters. Members in an OCC show the same kinematic behaviour, and a narrow age spread. We find, that the youngest cluster complex, OCC 1 (logt<7.9), with 19° inclination to the Galactic plane, is apparently a signature of Gould's Belt. The most abundant OCC 2 complex has moderate age (logt≃8.45). The clusters of the Perseus-Auriga group, having the same age as OCC 2, but different kinematics are seen in breaks between Perseus-Auriga clouds. The oldest (logt≃8.85) and sparsest group was identified due to a large motion in the Galactic anticentre direction. Formation rate and lifetime of open clusters are found to be 0.23±0.03kpc–2Myr–1 and 322±31Myr, respectively. This implies a total number of cluster generations in the history of the Galaxy between 30 to 40. We estimate that less than about 10% of the total Galactic stellar disk population has ever passed an open cluster membership.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: disk - Galaxy: kinematics and dynamics - open clusters and associations: general - solar neighbourhood - Galaxy: stellar content - Galaxy: structure

Simbad objects: 125

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Number of rows : 125
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 Cl Blanco 1 OpC 00 03 04.1 -29 48 55           ~ 380 0
2 Cl Alessi 1 OpC 00 53 31.9 +49 32 18           ~ 62 0
3 NAME HIP 5671 Cluster OpC 01 13 50 +32 01.7           ~ 32 0
4 NGC 1039 OpC 02 42 09.1 +42 44 02           ~ 467 0
5 NGC 1027 OpC 02 42 38.2 +61 36 49   7.28 6.7     ~ 109 0
6 Cl Trumpler 3 OpC 03 12 00.3 +63 12 35     7.0     ~ 57 0
7 Cl Stock 23 OpC 03 16 03.0 +60 19 52           ~ 54 0
8 Cl Melotte 20 MGr 03 26 50.6 +48 51 48           ~ 928 0
9 Cl King 6 OpC 03 27 58.1 +56 26 07           ~ 58 0
10 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
11 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1553 0
12 NAME Per Region reg 03 37 00.0 +31 15 00           ~ 296 0
13 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
14 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
15 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
16 NGC 1582 OpC 04 31 42.5 +43 42 38     7.0     ~ 52 0
17 Cl Alessi 2 OpC 04 46 32.2 +55 11 06           ~ 51 0
18 [KPR2005] 12 OpC 04 50 10.7 +41 42 34           ~ 37 0
19 NAME 25 Ori Group OpC 05 24 50.9 +01 41 38           ~ 195 1
20 Cl Collinder 65 OpC 05 26 06 +16 42.0           ~ 35 0
21 [KPR2005] 18 OpC 05 26 10 +00 49.2           ~ 36 0
22 [KPR2005] 19 OpC 05 28 06.0 -01 56 32           ~ 75 0
23 [KPR2005] 21 OpC 05 28 26.6 +03 33 00           ~ 75 0
24 [KPR2005] 20 OpC 05 28 44 +01 37.8           ~ 51 0
25 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
26 NGC 1977 OpC 05 35 12.7 -04 48 21           ~ 256 0
27 NGC 1980 OpC 05 35 15.5 -05 55 46     2.5     ~ 132 0
28 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
29 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
30 NGC 1981 OpC 05 35 24.4 -04 29 58     4.2     ~ 99 0
31 Cl Collinder 70 OpC 05 35 30 -01 06.0           ~ 65 0
32 Cl Collinder 69 OpC 05 35 32.1 +09 44 02     2.8     ~ 369 0
33 NAME Ori A MoC 05 38 -07.1           ~ 3187 0
34 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
35 Cl Stock 10 OpC 05 39 30.6 +37 49 20           ~ 59 0
36 NAME Gal Anticenter reg 05 46 +28.9           ~ 1024 0
37 NGC 2184 OpC 06 06 49.8 -02 02 22           ~ 49 1
38 NAME HIP 29713 Cluster MGr 06 15 26 +03 50.7           ~ 31 0
39 [FSR2007] 0746 OpC 06 20 14.8 +46 43 12           ~ 46 0
40 NGC 2232 OpC 06 27 45.6 -04 44 26           ~ 212 0
41 [KPR2005] 24 MGr 06 28 44 -07 01.2           ~ 20 0
42 Cl Collinder 95 OpC 06 31 06.8 +09 54 24           ~ 54 0
43 Cl Collinder 97 OpC 06 31 18 +05 55.0     5.4     ~ 32 0
44 [KPR2005] 34 OpC 07 10.5 +06 04           ~ 14 0
45 Cl Collinder 132 OpC 07 13 55.4 -30 41 55     3.6     ~ 78 0
46 Cl Collinder 135 OpC 07 17 23.6 -36 57 23           ~ 124 0
47 Cl Collinder 140 OpC 07 23 23.9 -31 58 15           ~ 154 0
48 [KPR2005] 38 OpC 07 27.2 -05 33           ~ 12 0
49 NGC 2396 OpC 07 27 59.9 -11 42 19     7.4     ~ 42 0
50 NGC 2413 OpC 07 33.1 -13 02           ~ 18 1
51 Cl Ruprecht 27 OpC 07 37 43.4 -26 31 03           ~ 40 0
52 NGC 2451A OpC 07 42 55.4 -38 15 05           ~ 159 0
53 Cl Ruprecht 31 OpC 07 43.0 -35 36           ~ 19 0
54 NGC 2451B OpC 07 44 22.6 -37 53 00           ~ 125 0
55 NAME Herschel 1 OpC 07 46 45.7 +00 09 45           ~ 50 0
56 ESO 123-26 OpC 07 52 50.7 -60 20 25           ~ 32 0
57 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 307 0
58 NGC 2547 OpC 08 10 01.5 -49 12 08           ~ 445 0
59 Cl VDBH 23 OpC 08 14 02.5 -36 18 23           ~ 55 0
60 Cl Ruprecht 65 OpC 08 39 24.6 -44 02 57           ~ 35 0
61 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
62 IC 2391 OpC 08 41 17.5 -53 03 00           ~ 871 0
63 Cl Mamajek 1 OpC 08 42 32.9 -78 57 47           ~ 392 0
64 Cl Trumpler 10 OpC 08 47 46.4 -42 31 52           ~ 203 0
65 Ass Vel OB 1 As* 08 49.9 -45 00           ~ 104 0
66 Cl Platais 8 OpC 09 06 04.4 -58 25 09           ~ 97 0
67 [KPR2005] 51 OpC 09 18.0 -69 41           ~ 24 0
68 Cl Turner 5 OpC 09 34 04.0 -36 26 03           ~ 48 0
69 [KPR2005] 59 OpC 10 20.2 -57 39           ~ 18 0
70 NGC 3228 OpC 10 21 34.1 -51 45 39           ~ 98 0
71 Cl Loden 143 OpC 10 28 54 -58 47.0           ~ 29 0
72 Cl Loden 89 OpC 10 29 09 -56 47.3           ~ 21 0
73 C 1028-538 OpC 10 30 17 -54 06.9           ~ 17 0
74 IC 2602 OpC 10 42 55.9 -64 25 22           ~ 735 0
75 Cl Alessi 5 OpC 10 43 20.9 -61 05 49           ~ 61 0
76 NGC 3532 OpC 11 05 33.9 -58 42 13           ~ 414 0
77 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1274 0
78 Cl Loden 915 OpC 13 34.1 -59 15           ~ 18 0
79 [KPR2005] 74 OpC 13 35.8 -58 49           ~ 14 0
80 C 1356-581 OpC 13 59 39 -58 20.0           ~ 20 0
81 Cl Loden 1194 OpC 14 08 16.1 -59 46 40           ~ 40 0
82 ESO 175-6 OpC 14 18 32 -56 55.1           ~ 21 0
83 C 1440+697 Cl* 14 40.9 +69 34           ~ 29 0
84 NAME Car-Sgr Arm PoG 15 00 -40.0           ~ 581 1
85 NAME Ursa Major Cluster ClG 15 08.8 +67 07           ~ 424 1
86 [KPR2005] 83 OpC 15 50.2 -52 48           ~ 17 0
87 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
88 NGC 6124 OpC 16 25 18.6 -40 39 45   6.70 5.8     ~ 91 0
89 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
90 NGC 6281 OpC 17 04 44.6 -37 57 08           ~ 156 0
91 [KPR2005] 89 Cl* 17 23.3 -62 38           ~ 12 0
92 Cl Alessi 9 OpC 17 44 16.5 -47 03 45           ~ 66 0
93 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
94 IC 4665 OpC 17 46 04.0 +05 36 54           ~ 407 0
95 NGC 6469 OpC 17 53 04.2 -22 17 51     8.2     ~ 34 0
96 M 23 OpC 17 56 56.2 -18 58 21           ~ 144 0
97 NAME Aql Rift DNe 18 32 -01.0           ~ 355 1
98 [KPR2005] 99 OpC 18 48 40.8 -18 27 04           ~ 42 0
99 NAME del Lyr Cluster OpC 18 54 11.2 +36 53 54   4.58 3.8     ~ 97 0
100 NAME Sgr Arm PoG 19 00 -30.0           ~ 710 1
101 NGC 6738 OpC 19 01.3 +11 37     8.3     ~ 23 0
102 [KPR2005] 101 OpC 19 13 29.5 +36 19 29           ~ 48 0
103 NGC 6793 OpC 19 23 16.4 +22 08 54           ~ 53 0
104 NGC 6800 OpC 19 26 50.5 +25 06 24           ~ 40 0
105 Cl Stock 1 OpC 19 36 35.9 +25 07 31     5.3     ~ 72 0
106 Cl Alessi 44 OpC 19 42 05.0 +01 26 22           ~ 42 0
107 NGC 6828 OpC 19 50 17 +07 54.2           ~ 28 0
108 [KPR2005] 109 OpC 19 54.0 +34 35           ~ 15 0
109 Cl Roslund 5 OpC 20 10 30.5 +33 46 04           ~ 62 0
110 Cl Roslund 6 OpC 20 29 00.4 +40 01 11           ~ 66 0
111 NGC 6991 OpC 20 54 31.8 +47 23 26           ~ 77 2
112 NGC 7058 OpC 21 21 46.1 +50 49 43           ~ 48 0
113 NGC 7092 OpC 21 31 04.0 +48 17 47           ~ 245 0
114 [KPR2005] 115 OpC 21 57 11.9 +51 32 28           ~ 38 0
115 NGC 7209 OpC 22 04 50.7 +46 30 11   8.24 7.7     ~ 144 0
116 [KPR2005] 123 OpC 22 42 14.8 +54 00 20           ~ 49 0
117 Cl Alessi 37 OpC 22 47 46.1 +46 25 16           ~ 50 0
118 [KPR2005] 127 OpC 23 09 14.3 +64 59 56           ~ 51 0
119 Cl Stock 12 OpC 23 35 40.6 +52 40 19           ~ 56 0
120 NAME Vela Field reg ~ ~           ~ 200 0
121 NAME Hyades Moving Group MGr ~ ~           ~ 300 0
122 NAME Aur-Per reg ~ ~           ~ 7 0
123 NAME Sgr Region reg ~ ~           ~ 47 0
124 NAME Vulpecula Region reg ~ ~           ~ 30 0
125 NAME Gould Belt PoG ~ ~           ~ 956 1

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