J/A+A/306/134 Liller 1 (Ortolani+, 1996)
NTT V, I and Gunn z colour-magnitude diagrams of Liller 1: a globular cluster
as metal-rich as the inner bulge stellar population ?
Ortolani S., Bica E., Barbuy B.
<Astron. Astrophys. 306, 134 (1996)>
=1996A&A...306..134O 1996A&A...306..134O (SIMBAD/NED BibCode)
ADC_Keywords:Clusters, globular ; Photometry, VRI;
Keywords: Galaxy: globular clusters: individual: Liller 1 - stars: HR diagram -
stars: abundances
Description:
We carried out VRI and Gunn z observations of the obscured globular
cluster Liller 1. The cluster is so reddened (AV≃9.0) that it is
at the detection limit in V. The RGB in I vs. (I-z) shows a strong
curvature. Recalling that the nearly solar metallicity globular clusters
NGC 6553 and NGC 6528 present similar blanketing effects only in the
visible bandpasses, we conclude that Liller 1 is considerably more
metal-rich than these clusters. The CMD comparison of Liller 1
with the inner bulge field around it (located ≃5deg from the nucleus),
suggests that the cluster is as metallic as the most metallic fraction
of this inner bulge population. Similarly deep I and z observations
at ≃0.5deg away from Liller 1, at the nominal position of Grindlay 1
do not reveal any cluster.
Object:
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RA (2000) DE Names
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17 33 24.0 -33 23 16 Cl Liller 1 = C 1730-333
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 64 3168 I, Gunn z photometry of Liller1
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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6- 9 I4 --- Number + Sequence number
14- 20 F7.2 pix Xpos X pixel coordinate
25- 31 F7.2 pix Ypos Y pixel coordinate
37- 42 F6.3 mag Imag I magnitudes
48- 53 F6.3 mag Gmag Gunn z instrumental magnitudes
58- 64 F7.3 pix RDist Radial distance to cluster center
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Courtesy: Barbuy B.
(End) Simona Mei [CDS] 05-Jul-1995