J/AJ/107/1381 Sampling of globular clusters (Tello, 1994)
Sampling of globular clusters and the distance to the Galactic Center.
I. Data description and analysis
TELLO C.
<Astron. J. 107, 1381 (1994)>
=1994AJ....107.1381T 1994AJ....107.1381T (SIMBAD/NED Reference)
Abstract:
A recent compilation of globular cluster data [Harris, private
communication (1991)] has been examined for the purpose of selecting a
sufficiently large set of globular clusters with reliable distance
estimates. The absolute differences between recent and past estimates
of the cluster parameters V(HB) and E(B-V) have been studied in
statistically representative (but not mutually exclusive) subsets;
resulting in a conservative estimate of the average distance modulus
error of 0.40mag for a total selected sample of 134 objects. The
effects of spatial and metallicity segregation on the statistics of
this sample are investigated. The adopted distance scale uses
consistent correction terms for metallicity and reddening according to
the precepts in Racine & Harris [AJ, 98, 1609 (1989)]. From a direct
comparison with the spatial configuration of clusters derived in the
past, random observational errors are shown to dominate the
uncertainties in locating the clusters along their lines of sight.
Addresses:
Tello C.
Divisao de Astrofisica, Instituto Nacional de Pesquisas Espaciasis
(INPE/MCT), CP 515, Sao Jose dos Campos, SP, Brazil
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 70 135 Derived distance components for 134 selected
globular clusters
table4.tex 214 214 LaTeX version of table4.dat
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Byte-per-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Name Object name (1)
9- 13 F5.1 deg GLON Galactic longitude
15- 19 F5.1 deg GLAT Galactic latitude
22- 26 F5.2 mag V(HB) Estimated level of the horizontal branch
29- 33 F5.2 --- m/H Metallicity measure [m/H]
36- 39 F4.2 mag E(B-V) Reddening determination
42- 46 F5.1 kpc Dsun Radial distance from the Sun
48- 52 F5.1 kpc Xsun X component of distance = Dsun cos b cos l
54- 58 F5.1 kpc Ysun Y component of distance = Dsun cos b sin l
60- 64 F5.1 kpc Zsun Z component of distance = Dsun sin b
66- 67 A2 --- S1 'S1' if S0 cluster revised estimates in V(HB)
69- 70 A2 --- S2 'S2' if S0 cluster revised estimates in E(B-V)
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Note (1): Globular cluster Pal 10 appears in table4.dat although it does not
belong to the selected sample S0.
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Origin: AAS CD-ROM series, Volume 2, 1994
(End) Lee Brotzman [ADS] 23-Apr-1994, Patricia Bauer [CDS] 21-Oct-1994