J/ApJ/590/797 Parameters of galactic globular clusters (Van Den Bregh+, 2003)
Some global characteristics of the galactic globular cluster system.
Van Den Bergh S.
<Astrophys. J., 590, 797-802 (2003)>
=2003ApJ...590..797V 2003ApJ...590..797V
ADC_Keywords: Clusters, globular
Keywords: globular clusters: general
Abstract:
The relations between the luminosities MV, the metallicities [Fe/H],
the Galactocentric radii R, and the central concentration indices c of
Galactic globular clusters are discussed. It is found that the most
luminous clusters rarely have collapsed cores. The reason for this
might be that the core collapse timescales for such populous clusters
are greater than the age of the Galaxy. Among those clusters for which
the structure has not been modified by core collapse, there is a
correlation between central concentration and integrated luminosity,
in the sense that the most luminous clusters have the strongest
central concentration. The outermost region of the Galaxy with R>10kpc
was apparently not able to form metal-rich ([Fe/H]>-1.0) globular
clusters, whereas such clusters (of which Ter 7 is the prototype) were
able to form in some nearby dwarf spheroidal galaxies. It is not yet
clear how the popular hypothesis that globular clusters were initially
formed with a single power-law mass spectrum can be reconciled with
the observation that both (1) Galactic globular clusters with R>80kpc
and (2) the globulars associated with the Sagittarius dwarf appear to
have bimodal luminosity functions. Presently available data hint at,
but are not yet able to establish, the existence of a radial
metallicity gradient for metal-poor globular clusters with
[Fe/H]←1.0.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 31 146 Galactic globular cluster parameters
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See also:
VII/103 : Galactic Globular Clusters (Monella 1985)
VII/151 : Structure Parameters of Galactic Globular Clusters (Webbink 1985)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Globular cluster name
9- 13 F5.2 [Sun] [Fe/H] ? Cluster metallicity
15- 18 F4.2 [---] CIndex ? King (1962AJ.....67..471K 1962AJ.....67..471K) central
concentration index
20- 25 F6.2 mag VMAG ? Absolute integrated V-band magnitude
27- 31 F5.2 [kpc] log(R) Log of the Galactocentric distance
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 22-Aug-2007