http://arxiv.org/abs/2201.07221
Using the data from Gaia (ESA) Data Release 2 we performed the orbital calculations of globular clusters (GCs) of the Milky Way. To explore possible close encounters (or collisions) between the GCs, using our own developed high-order phi-GRAPE code, we integrated (backward and forward) the orbits of 119 objects with reliable positions and proper motions. In calculations, we adopted a realistic axisymmetric Galactic potential (bulge + disk + halo). Using different impact conditions, we found four pairs of the six GCs that may have experienced an encounter within twice the sum of the half-mass radii (collisions) over the last 5Gyr: Terzan3 – NGC 6553, Terzan 3 – NGC 6218, Liller 1 – NGC 6522 and Djorg 2 – NGC 6553.
I. Chemerynska, M. Ishchenko, M. Sobolenko, et. al.
Thu, 20 Jan 22
37/77
Comments: Accepted for publication in Advances in Astronomy and Space Physics (this http URL). arXiv admin note: substantial text overlap with arXiv:2201.06891
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