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We used extra-tidal RR Lyrae stars to study the dynamics of Galactic globularclusters and know how effects like dynamical friction and tidal disruptionaffect these clusters. The Gaia DR2 catalog for RR Lyrae stars (Clementini etal. 2018) is used along with the proper motions and tidal radii data for theglobular clusters compiled from literature. A sample of 56 Galactic globularclusters is analyzed. Out of these 56 Galactic globular clusters, only 11 haveextra-tidal RR Lyrae stars. However, only two clusters, namely, NGC 3201 andNGC 5024, have enough extra-tidal RR Lyrae stars to draw interestingconclusions. NGC 3201 has 13 extra-tidal RR Lyrae stars which areasymmetrically distributed around its center with more number of stars in itstrailing zone than its leading part. We conclude that these asymmetrical tidaltails are due to the combined effect of tidal disruption and the strippeddebris from the cluster. On the other hand, NGC 5024 has 5 extra-tidal RR Lyraestars, four of them are concentrated in a region which is at a distance ofabout 3 times the tidal radius from its center. These may be the stars that arebeing ripped apart from the cluster due to tidal disruption. The presence ofthese extra-tidal RR Lyrae stars in the clusters can be an indication that morecluster stars are present outside their tidal radii which may be revealed bydeep wide field CMDs of the clusters.

Search for Extra-Tidal RR Lyrae Stars in Milky Way Globular Clusters From Gaia DR2