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

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

2006A&A...445..545P - Astronomy and Astrophysics, volume 445, 545-565 (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 - 2024 		#notes
1 Cl Blanco 1 OpC 00 03 24.7 -29 57 29           ~ 325 0
2 Cl Alessi 1 OpC 00 53 22.3 +49 32 10           ~ 47 0
3 NAME HIP 5671 Cluster OpC 01 13 50 +32 01.7           ~ 31 0
4 NGC 1039 OpC 02 42 07.4 +42 43 19           ~ 430 0
5 NGC 1027 OpC 02 42 42.5 +61 36 58   7.28 6.7     ~ 95 0
6 Cl Trumpler 3 OpC 03 12 01.0 +63 13 05     7.0     ~ 46 0
7 Cl Stock 23 OpC 03 16 18.0 +60 22 37           ~ 43 0
8 Cl Melotte 20 OpC 03 26 28.1 +48 58 30           ~ 861 0
9 Cl King 6 OpC 03 27 55.7 +56 26 38           ~ 48 0
10 NAME Per Arm PoG 03 30 +45.0           ~ 1513 0
11 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1364 0
12 NAME Per Region reg 03 37 00.0 +31 15 00           ~ 271 0
13 IC 348 OpC 03 44 31.7 +32 09 32           ~ 1392 1
14 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3074 0
15 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1357 0
16 NGC 1582 OpC 04 31 56.4 +43 43 05     7.0     ~ 42 0
17 Cl Alessi 2 OpC 04 46 24.5 +55 11 56           ~ 40 0
18 [KPR2005] 12 OpC 04 49 36.0 +41 44 38           ~ 28 0
19 NAME 25 Ori Group OpC 05 24 47.5 +01 39 18           ~ 159 1
20 Cl Collinder 65 OpC 05 26 06 +16 42.0           ~ 33 0
21 [KPR2005] 18 OpC 05 26 10 +00 49.2           ~ 31 0
22 [KPR2005] 19 OpC 05 27 55.7 -01 59 13           ~ 52 0
23 [KPR2005] 21 OpC 05 28 43.0 +03 31 37           ~ 56 0
24 NAME HR 1833 Cluster OpC 05 28 44 +01 37.8           ~ 41 0
25 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2331 0
26 Cl Collinder 69 OpC 05 35 10.1 +09 48 47     2.8     ~ 313 0
27 NGC 1980 OpC 05 35 14.4 -05 55 26     2.5     ~ 110 0
28 NGC 1977 OpC 05 35 15.6 -04 49 08           ~ 231 0
29 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1619 1
30 M 42 HII 05 35 17 -05 23.4           ~ 4074 0
31 NGC 1981 OpC 05 35 23.5 -04 29 10     4.2     ~ 86 0
32 Cl Collinder 70 OpC 05 35 30 -01 06.0           ~ 61 0
33 NAME Ori A MoC 05 38 -07.1           ~ 3011 0
34 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 567 0
35 Cl Stock 10 OpC 05 39 13.9 +37 51 00           ~ 46 0
36 NAME Gal Anticenter reg 05 46 +28.9           ~ 911 0
37 NGC 2184 OpC 06 06 45.6 -02 00 00           ~ 36 1
38 NAME HIP 29713 Cluster MGr 06 15 26 +03 50.7           ~ 28 0
39 [FSR2007] 0746 OpC 06 20 11.3 +46 42 36           ~ 35 0
40 NGC 2232 OpC 06 27 33.1 -04 44 56           ~ 185 0
41 [KPR2005] 24 MGr 06 28 44 -07 01.2           ~ 17 0
42 Cl Collinder 95 OpC 06 31 09.1 +09 53 38           ~ 46 0
43 Cl Collinder 97 OpC 06 31 18 +05 55.0     5.4     ~ 30 0
44 [KPR2005] 34 OpC 07 10.5 +06 04           ~ 12 0
45 Cl Collinder 132 OpC 07 13 56.4 -30 45 29     3.6     ~ 66 0
46 Cl Collinder 135 OpC 07 17 26.9 -37 02 38           ~ 93 0
47 Cl Collinder 140 OpC 07 23 31.7 -31 57 58           ~ 131 0
48 [KPR2005] 38 OpC 07 27.2 -05 33           ~ 10 0
49 NGC 2396 OpC 07 27 56 -11 43.5     7.4     ~ 35 0
50 NGC 2413 OpC 07 33.1 -13 02           ~ 16 1
51 Cl Ruprecht 27 OpC 07 37 41.5 -26 30 58           ~ 35 0
52 NGC 2451A OpC 07 42 56.6 -38 15 50           ~ 129 0
53 Cl Ruprecht 31 OpC 07 43.0 -35 36           ~ 16 0
54 NGC 2451B OpC 07 44 30.7 -37 57 14           ~ 96 0
55 NAME Herschel 1 OpC 07 46 41.8 +00 08 13           ~ 33 0
56 ESO 123-26 OpC 07 52 29 -60 22.4           ~ 24 0
57 Ass Vel OB 2 As* 08 09 22.478 -47 21 03.46           ~ 272 0
58 NGC 2547 OpC 08 09 52.360 -49 10 35.01           ~ 400 0
59 Cl VDBH 23 OpC 08 13 47.8 -36 19 44           ~ 43 0
60 Cl Ruprecht 65 OpC 08 39 21 -44 02.5           ~ 28 0
61 NGC 2632 OpC 08 40 13.0 +19 37 16           ~ 1564 0
62 IC 2391 OpC 08 41 10.1 -52 59 28           ~ 822 0
63 NAME eta Cha Association OpC 08 42 32.9 -78 57 47           ~ 363 0
64 Cl Trumpler 10 OpC 08 47 46.3 -42 33 58           ~ 175 0
65 Ass Vel OB 1 As* 08 49.9 -45 00           ~ 100 0
66 Cl Platais 8 OpC 09 06 52.3 -58 41 06           ~ 76 0
67 [KPR2005] 51 OpC 09 18.0 -69 41           ~ 17 0
68 Cl Turner 5 OpC 09 33 08.2 -36 21 29           ~ 39 0
69 [KPR2005] 59 OpC 10 20.2 -57 39           ~ 17 0
70 NGC 3228 OpC 10 21 30.7 -51 48 50           ~ 84 0
71 Cl Loden 143 OpC 10 28 54 -58 47.0           ~ 27 0
72 Cl Loden 89 OpC 10 29 09 -56 47.3           ~ 19 0
73 C 1028-538 OpC 10 30 17 -54 06.9           ~ 15 0
74 IC 2602 OpC 10 42 27.1 -64 25 34           ~ 675 0
75 Cl Alessi 5 OpC 10 43 16.6 -61 04 52           ~ 49 0
76 NGC 3532 OpC 11 05 40.1 -58 42 25           ~ 350 0
77 NAME NGP reg 12 51 26.275 +27 07 41.70           ~ 1178 0
78 Cl Loden 915 OpC 13 34.1 -59 15           ~ 16 0
79 [KPR2005] 74 OpC 13 35.8 -58 49           ~ 12 0
80 C 1356-581 OpC 13 59 39 -58 20.0           ~ 18 0
81 Cl Loden 1194 OpC 14 08 01.4 -59 47 10           ~ 33 0
82 ESO 175-6 OpC 14 18 32 -56 55.1           ~ 19 0
83 C 1440+697 Cl* 14 40.9 +69 34           ~ 27 0
84 NAME Car-Sgr Arm PoG 15 00 -40.0           ~ 514 1
85 NAME Ursa Major Cluster ClG 15 08.8 +67 07           ~ 409 0
86 [KPR2005] 83 OpC 15 50.2 -52 48           ~ 14 0
87 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1330 1
88 NGC 6124 OpC 16 25 19.7 -40 39 40   6.70 5.8     ~ 76 0
89 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3629 1
90 NGC 6281 OpC 17 04 43.0 -37 56 53           ~ 137 0
91 [KPR2005] 89 Cl* 17 23.3 -62 38           ~ 11 0
92 Cl Alessi 9 OpC 17 43 53.8 -47 01 41           ~ 45 0
93 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14407 0
94 IC 4665 OpC 17 46 13.0 +05 36 54           ~ 372 0
95 NGC 6469 OpC 17 53 06.5 -22 18 00     8.2     ~ 30 0
96 M 23 OpC 17 56 56.9 -18 59 13           ~ 132 0
97 NAME Aql Rift DNe 18 32 -01.0           ~ 316 1
98 [KPR2005] 99 OpC 18 48 40.8 -18 29 17           ~ 29 0
99 NAME del Lyr Cluster OpC 18 54 16.3 +36 53 56   4.58 3.8     ~ 79 0
100 NAME Sgr Arm PoG 19 00 -30.0           ~ 637 1
101 NGC 6738 OpC 19 01.3 +11 37     8.3     ~ 21 0
102 [KPR2005] 101 OpC 19 13 35.8 +36 22 08           ~ 33 0
103 NGC 6793 OpC 19 23 16.1 +22 09 32           ~ 44 0
104 NGC 6800 OpC 19 26 39.4 +25 00 29           ~ 30 0
105 Cl Stock 1 OpC 19 36 35.0 +25 09 47     5.3     ~ 56 0
106 Cl Alessi 44 OpC 19 41 18.0 +01 35 31           ~ 31 0
107 NGC 6828 OpC 19 50 17 +07 54.2           ~ 26 0
108 [KPR2005] 109 OpC 19 54.0 +34 35           ~ 13 0
109 Cl Roslund 5 OpC 20 10 33.8 +33 45 04           ~ 51 0
110 Cl Roslund 6 OpC 20 28 44.4 +39 47 53           ~ 44 0
111 NGC 6991 OpC 20 54 29.0 +47 24 00           ~ 57 2
112 NGC 7058 OpC 21 21 47.5 +50 49 19           ~ 36 0
113 NGC 7092 OpC 21 31 33.4 +48 14 49           ~ 223 0
114 [KPR2005] 115 OpC 21 57 07 +51 33.5           ~ 31 0
115 NGC 7209 OpC 22 04 53.8 +46 30 29   8.24 7.7     ~ 128 0
116 [KPR2005] 123 OpC 22 41 11.8 +53 59 10           ~ 34 0
117 Cl Alessi 37 OpC 22 47 50.6 +46 20 31           ~ 35 0
118 [KPR2005] 127 OpC 23 08 49.2 +64 58 26           ~ 34 0
119 Cl Stock 12 OpC 23 35 41.5 +52 41 06           ~ 41 0
120 NAME Gould Belt PoG ~ ~           ~ 873 1
121 NAME Aur-Per reg ~ ~           ~ 7 0
122 NAME Vulpecula Region reg ~ ~           ~ 29 0
123 NAME Hyades Moving Group MGr ~ ~           ~ 281 0
124 NAME Sgr Region reg ~ ~           ~ 42 0
125 NAME Vela Field reg ~ ~           ~ 182 0

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