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M31 Globular Clusters: Colors and Metallicities
P. Barmby, J. P. Huchra, J. P. Brodie +3
We present a new catalog of photometric and spectroscopic data on M31 globular clusters. The catalog includes new optical and near-infrared photometry for a substantial fraction of…
The Age Difference between the Globular Cluster Sub-populations in NGC 4472
Thomas H. Puzia, Markus Kissler-Patig, Jean P. Brodie +1
The age difference between the two main globular cluster sub-populations in the Virgo giant elliptical galaxy, NGC 4472 (M 49), has been determined using HST WFPC2 images in the F5…
A Multiwavelength View at the Heart of the Superwind in NGC 253
Duncan A. Forbes, Edward Polehampton, Ian R. Stevens +2
Here we present new optical data from the Hubble Space Telescope of the NGC 253 central region, which reveal numerous discrete sources in a ring--like structure. This is combined w…