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Globular clusters (GCs) contain huge number of low mass stars and also largenumber of millisecond pulsars (MSPs). Due to the number of stars, the stellarand MSP winds mix efficiently within the GC. Such mixture of winds leaves GCand interacts with the galactic medium creating a bow shock nebula around GC.The bow shock nebula is filled with relativistic leptons accelerated in thepulsar magnetospheres and/or wind regions. We argue that nebulae aroundglobular clusters, immersed in relatively dense medium close to the galacticplane, should have complicated morphology due to interaction with thesurrounding gas. Therefore, TeV $\gamma$-ray sources, related to these nebulae,are expected to be misaligned in respect to GC cores, as observed in the caseof GC Ter 5. On the other hand, GCs in low density medium, i.e. far away fromthe galactic disk, should produce bow shocks at large distances from the GCcores. The TeV $\gamma$-ray sources around such nebulae are expected to bealmost spherical and centred on the GC cores. We perform numerical calculationsof the TeV $\gamma$-ray emission produced by leptons escaping from the GC Ter5. It is shown that TeV $\gamma$-ray source related to Ter 5 should bemisaligned in respect to the core of GC as observed by the HESS Collaboration.

Misaligned TeV gamma-ray sources in the vicinity of globular clusters