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J/AJ/131/1559   Diameters of Galactic open star clusters  (van den Bergh+, 2006)

Diameters of open star clusters. van den Bergh S. <Astron. J., 131, 1559-1564 (2006)> =2006AJ....131.1559V
ADC_Keywords: Clusters, open ; Morphology Keywords: open clusters and associations: general Abstract: The present paper presents a tabulation of data on all 600 Galactic open clusters for which it is currently possible to calculate linear diameters. As expected, the youngest "clusters", with ages <15Myr, contain a significant (≥20%) admixture of associations. Among intermediate-age clusters, with ages in the range 15Myr to 1.5Gyr, the median cluster diameter is found to increase with age. Small, compact clusters are rare among objects with ages >1.5Gyr. Open clusters with ages >1Gyr appear to form what might be termed a "cluster thick disk", part of which consists of objects that were probably captured gravitationally by the main body of the Galaxy. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 48 600 Diameters of open clusters
See also: VII/229 : Optically visible open clusters and Candidates (Dias+ 2002-2005) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Running cluster number 5- 15 A11 ---- Name Cluster name 17- 19 I3 deg l Truncated Galactic longitude 21- 25 F5.2 pc Diam Cluster diameter 27- 31 I5 pc R Cluster distance from the Sun 33- 37 I5 pc Z Galactic plane scale height (1) 39- 42 F4.2 mag E(B-V) ? The reddening from photoelectric photometry 44- 48 F5.2 [yr] logT ? Log of the cluster age (2)
Note (1): assuming Z=Rsin(b). Note (2): As derived from its dereddened color-magnitude diagram.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 08-Feb-2007
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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