Extra-tidal star candidates in globular clusters of the Sagittarius dwarf spheroidal galaxy

Globular clusters (GCs) associated with the Sagittarius dwarf spheroidal galaxy (Sgr dSph) have evolved under gravitational potential of both Sgr dSph and Milky Way. The effects these potentials are most pronounced in extra-tidal regions as compared to central GCs.We aim study GCs that possibly dSph, namely Arp 2, Terzan 8, NGC 5634, 6284, 7, 2419, 4147, M 54 Pal 12, using data from {\it Gaia} early release 3. We selected candidates based on their angular distances cluster centre RA-Dec plane, proper motions individual star candidates, positions colour-magnitude diagrams clusters. found for nine studied GCs. For eight them, surface density candidate stars vicinity is significant excess respect more distant surrounding fields. No extended features beyond 5 tidal radii were detected any publish a list probable we determined Gaia astrometric photometric data. Our analysis shows likely affected by Sgr, distribution elongated same direction local stream. 4147 only exception. some high-probability several analysed failed detect coherent large-scale tail around them.