A New Catalog of orbits of 152 Globular Clusters from Gaia EDR3

TL;DR

This paper presents a new catalog of globular cluster orbits based on Gaia EDR3 data, providing updated orbital parameters for 152 clusters using advanced modeling over a 5 Gyr timescale.

Contribution

It introduces a revised set of globular cluster orbits utilizing Gaia EDR3 measurements and an improved galactic potential model, enhancing previous orbit catalogs.

Findings

Updated orbital parameters for 152 globular clusters.

Comparison with previous Gaia DR2-based orbits shows improvements.

Provides a comprehensive dataset for galactic dynamics studies.

Abstract

This paper provides a new catalog of orbits and their parameters for a practically complete list of currently known galactic globular clusters (GCs), compiled by Vasiliev (2019) based on the most accurate modern measurements of their velocities and positions. The integration of the orbits of 152 globular clusters for 5 Gyr backward was performed using the new average proper motions obtained from the Gaia EDR3 catalog (Vasiliev and Baumgardt, 2021) and new average distances (Baumgardt and Vasiliev, 2021) in the axisymmetric three-component potential with spherical bulge, disk component, and spherical dark Navarro-Frank-White halo (Bajkova and Bobylev, 2016). The new orbital parameters are compared with the orbital parameters constructed by us earlier (Bajkova and Bobylev, 2021) in the same gravitational potential using proper motions obtained from the Gaia DR2 catalog (Vasiliev, 2019) and with the distances from the Harris catalog (2010).