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

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

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101..967h&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 101, March 1991, p. 967-979.

Astronomy and Astrophysics

Astronomy

25

Astronomical Photometry, Galactic Evolution, Globular Clusters, Stellar Evolution, Color-Magnitude Diagram, Halos, Metallicity, Milky Way Galaxy, Ubv Spectra

Scientific paper

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.

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