Distances of GCs Ter5, Liller 1, UKS and Terzan 4 with NICMOS…

Bulge globular clusters :: preprint

Distances of the bulge globular clusters Terzan 5, Liller 1, UKS 1 and Terzan 4 based on HST NICMOS photometry

Authors: S. Ortolani, B. Barbuy, E. Bica, M. Zoccali, A. Renzini

Abstract: A large number of pulsars and X-rays sources are detected in globular clusters. To understand the structure and content of these clusters, accurate distances are required. We derive the distances of Terzan 5, Liller 1 and UKS 1 using as a reference a recent distance determination of NGC 6528, based on HST/NICMOS and NTT/SOFI infrared photometry. The distance of the metal-poor cluster Terzan 4 was derived from a comparison with M92 in NICMOS bands…

URL: http://babbage.sissa.it/abs/0705.4030


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