J/A+A/468/151 Nearby open clusters radii and masses (Piskunov+, 2007)
Towards absolute scales for the radii and masses of open clusters.
Piskunov A.E., Schilbach E., Kharchenko N.V., Roeser S., Scholz R.-D.
<Astron. Astrophys. 468, 151 (2007)>
=2007A&A...468..151P 2007A&A...468..151P
ADC_Keywords: Clusters, open ; Morphology
Keywords: Galaxy: open clusters and associations: general -
solar neighbourhood - Galaxy: stellar content
Description:
The table presents tidal parameters and masses of 236 open clusters in
the nearest kiloparsecs around the Sun. The parameters are derived
from a fitting of three-parameter King profiles to the the observed
density distribution. The clusters are sub-sample of the Catalogue of
Open Cluster Data and their members are selected from high precision
homogeneous all sky catalogue ASCC-2.5 (Kharchenko, 2001, Cat.
I/280). Up to four cluster membership samples in wide cluster area
are considered for every cluster and the best solution is presented in
the table. Clusters in the table are sorted by numbers in the COCD
order.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 110 236 King parameters and tidal masses for 236 open
clusters
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See also:
I/280 : All-sky Compiled Catalogue of 2.5 million stars (Kharchenko 2001)
J/A+A/438/1163 : Catalogue of Open cluster Data (COCD) (Kharchenko+, 2005)
J/A+A/440/403 : 109 new Galactic open clusters (COCD1) (Kharchenko+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- COCD COCD number (>1000 for COCD1)
6- 22 A17 --- Name Cluster designation (NGC, IC or other)
24- 29 F6.2 deg GLON Galactic longitude
31- 36 F6.2 deg GLAT Galactic latitude
38- 41 I4 pc Dist Heliocentric distance
43- 46 F4.2 mag E(B-V) Colour-excess
48- 51 F4.2 [yr] logt Logarithm of age
53- 56 F4.2 deg r1 Empirical angular radius of the core
58- 61 F4.2 deg r2 Empirical angular radius of the cluster
63 I1 --- Sol [1-4] Number of the acceptable solutions of
King's parameters from 4 membership groups
65 I1 --- Sam [1-4] Number of the membership sample
providing the best solution
67- 69 I3 --- N2 Number of the cluster members of this sample
within r2
71- 74 F4.1 pc rc Core radius (King)
76- 78 F3.1 pc e_rc rms error of King core radius
80- 83 F4.1 pc rt Tidal radius (King)
85- 88 F4.1 pc e_rt rms error of King tidal radius
90- 93 F4.1 --- k King's normalizing factor
95- 98 F4.1 --- e_k rms error of King normalizing factor
100-104 F5.3 [solMass] logM Logarithm of cluster mass
106-110 F5.3 [solMass] e_logM rms error of logarithm of cluster mass
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Acknowledgements: Anatoly Piskunov
(End) Patricia Vannier [CDS] 23-Mar-2007