Photometry of the outer halo globular clusters NGC 5024 and NGC 5053

New CCD photometry of the low-metallicity outer halo globular clusters NGC 5024 and NGC 5053 is used to construct BV color-magnitude diagrams that reach approximately 2 mag fainter than the turnoff in these clusters. A differential comparison of the color-magnitude diagrams with that of M92 indicate...

Full description

Saved in:
Bibliographic Details
Published in:The Astronomical journal 1991-03, Vol.101, p.967-979
Main Authors: Heasley, J. N., Christian, Carol A.
Format: Article
Language:English
Subjects:
640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources
640105 - Astrophysics & Cosmology- Galaxies
ABUNDANCE
AGE ESTIMATION
CHEMICAL COMPOSITION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPARATIVE EVALUATIONS
ELEMENT ABUNDANCE
ELEMENTS
GALACTIC EVOLUTION
GALAXIES
HYDROGEN
IRON
METALS
MILKY WAY
NONMETALS
PHOTOMETRY
STAR CLUSTERS
STAR EVOLUTION
TRANSITION ELEMENTS
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:New CCD photometry of the low-metallicity outer halo globular clusters NGC 5024 and NGC 5053 is used to construct BV color-magnitude diagrams that reach approximately 2 mag fainter than the turnoff in these clusters. A differential comparison of the color-magnitude diagrams with that of M92 indicates that all three clusters are identical in age to within the uncertainties of the observations. With the addition of these two clusters, color-magnitude diagrams are now available for more than half of the globular clusters with Fe/H less than -2.0, and with the exception of Ruprecht 106, no discernible spread in age among these clusters is detected. (Author)
ISSN:0004-6256
1538-3881
DOI:10.1086/115740