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Home List of Titles A color-magnitude diagram for a globular cluster in the giant elliptical galaxy NGC 5128
Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/69747
- A color-magnitude diagram for a globular cluster in the giant elliptical galaxy NGC 5128
- Harris, Gretchen L. H.; Poole, G. B.; Harris, William E.
- The Hubble Space Telescope has been used to obtain WFPC2 V , I photometry for a large sample of stars in the outer halo of the giant elliptical NGC 5128 (d similar or equal to 4 Mpc). The target region is located at a projected distance 21 kpc from the center of NGC 5128. The globular cluster N5128-C44, at the center of the Planetary Camera field, is well enough resolved to permit the construction of a color-magnitude diagram (CMD) for it that covers the brightest 2 mag of the giant branch. The CMD is consistent with that of a normal old, intermediate-metallicity ([Fe/H]D[1.3) globular cluster, distinctly more metal poor than most of the field halo stars at the same projected location (which average [Fe/H]D[0.5). This is the most distant globular cluster in which direct color-magnitude photometry has been achieved to date and the first one belonging to a giant E galaxy.
- Publication type
- Journal article
- Astronomical Journal, Vol. 116 (Dec 1998), pp. 2866-2872
- Publication year
- Elliptical galaxies; Lenticular galaxies; Star clusters
- University of Chicago Press
- Publisher URL
- Copyright © 1998 The American Astronomical Society. All rights reserved. The American Astronomical Society does not allow institutions to archive either the accepted manuscript or the published version of the article. However, you can find an earlier version of the full text here: http://arxiv.org/abs/astro-ph/9806390.
- Peer reviewed