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[80.09] Wide-Field Washington Photometry of the NGC 5128 Globular Cluster System

D. Geisler (Univ. de Concepcion), G.L.H. Harris, M. Reid, M. Milne, S.C. Hulme, T.T. Kidd (Univ. Waterloo), W.E. Harris (McMaster Univ.), B.P. Schmidt (ANU), J.E. Hesser (HIA)

We have obtained deep imaging in the Washington CMT1 filters for an area of almost 2 square degrees centered on NGC 5128 in order to investigate its globular cluster system. Our data suffers from severe foreground and background contamination problems. Nonetheless, we can examine some of the global statistical properties of the cluster system. We find that NGC 5128 has a smaller cluster population than previously thought, with a steep projected radial distribution. We find the metallicity distribution for some 211 known globular clusters to be strongly bimodal with nearly equal numbers of clusters in each mode. We also present a list of 327 new cluster candidates not previously identified.

D.G. gratefully acknowledges support from the Chilean Centro de Astrofisica FONDAP grant No. 15010003 and from NASA contract No. 1228235.

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Bulletin of the American Astronomical Society, 36 #2
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