# Galactic Orbits of Globular Clusters in the Region of the Galactic Bulge

## TL;DR

This study models the orbits of ten globular clusters near the Galactic center, revealing the influence of the Galactic bar on their trajectories and identifying clusters that remain within the bulge region.

## Contribution

It introduces a combined axially symmetric and barred potential model to analyze globular cluster orbits near the Galactic center.

## Key findings

- Bar influences cluster trajectories, especially for Terzan 4.
- Several clusters stay within 4 kpc of the Galactic center.
- Trajectories vary significantly with the bar's presence.

## Abstract

Galactic orbits have been constructed over long time intervals for ten globular clusters located near the Galactic center. A model with an axially symmetric gravitational potential for the Galaxy was initially applied, after which a non-axially symmetric potential corresponding to the central bar was added. Variations in the trajectories of all these globular clusters in the XY plane due to the influence of the bar were detected. These were greatest for the cluster Terzan 4 in the meridional (RZ) plane. The globular clusters Terzan 1, Terzan 2, Terzan 4, Terzan 9, NGC 6522, and NGC 6558 always remained within the Galactic bulge, no farther than 4 kpc from the Galactic center.