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Comparison of the Orbital Properties of the Milky Way Globular Clusters from the Data of the Gaia DR2 and EDR3 Catalogs

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Abstract

We provide new values of the orbital parameters of 152 globular clusters, which are calculated using the new mean proper motions obtained from the Gaia EDR3 catalog data. The orbits were integrated 5 Gyr back in an axisymmetric three-component potential with a spherical bulge, disk component, and spherical dark halo in the Navarro–Frenk–White form, which we refined using the rotation curve of objects with large galactocentric distances up to 200 kpc. The obtained orbital parameters were compared with the orbital parameters of the same globular clusters calculated earlier in the same gravitational potential using proper motions from the Gaia DR2 catalog data. The objects whose orbits underwent significant changes were identified.

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ACKNOWLDEGMENTS

The authors are grateful to the anonymous reviewer for comments that have helped improve the article.

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Authors and Affiliations

  1. Central (Pulkovo) Astronomical Observatory, Russian Academy of Sciences, St. Petersburg, Russia

    A. T. Bajkova & V. V. Bobylev

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  1. A. T. Bajkova
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  2. V. V. Bobylev
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Correspondence to A. T. Bajkova.

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Translated by M. Chubarova

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Bajkova, A.T., Bobylev, V.V. Comparison of the Orbital Properties of the Milky Way Globular Clusters from the Data of the Gaia DR2 and EDR3 Catalogs. Astron. Rep. 65, 737–754 (2021). https://doi.org/10.1134/S1063772921090018

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  • DOI: https://doi.org/10.1134/S1063772921090018

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