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Abstract
The well-known solution of Vaidya for a radiating sphere in a Kaluza–Klein-type of space–time is extended. The field equations yield a two-parameter solution—either an exactly four-dimensional Vaidya metric with a flat extra space tucked to it or a flat Minkowski space–time. The geodesic trajectories of test particles in this field are studied and some astrophysical consequences due to the presence of the extra space are also briefly discussed.
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