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The dynamical evolution of a single globular cluster and also of the entireGalactic globular cluster system has been studied theoretically in detail. Inparticular, simulations show how the 'lost' stars are distributed in tidaltails emerging from the clusters. We investigate the distribution of Galacticglobular cluster stars on the sky to identify such features like tidal tails.The Sloan Digital Sky Survey provides consistent photometry of a large part ofthe sky to study the projected two dimensional structure of the 17 globularclusters in its survey area. We use a color-magnitude weighted countingalgorithm to map (potential) cluster member stars on the sky. We recover thealready known tidal tails of Pal 5 and NGC 5466. For NGC 4147 we have found atwo arm morphology. Possible indications of tidal tails are also seen aroundNGC 5053 and NGC 7078, supporting earlier suggestions. Moreover, we findpotential tails around NGC 5904 and Pal 14. Especially for the Palomar clustersthan Pal 5, deeper data are needed in order to confirm or to rule out theexistence of tails. For many of the remaining clusters in our sample we observea pronounced extratidal halo, which is particularly large for NGC 7006 and Pal1. In some cases, the extratidal halos may be associated with the stream of theSagittarius dwarf spheroidal galaxy (e.g.,NGC 4147, NGC 5024, NGC 5053).

Search for Extratidal Features Around 17 Globular Clusters in the Sloan Digital Sky Survey