https://doi.org/10.1140/epjp/s13360-024-05619-9
Letter to the Editor
S2-star dynamics probing the galaxy core cluster
1
National Research Nuclear University MEPhI, Moscow, Russia
2
Center for Cosmology and Astrophysics, Alikhanian National Laboratory and Yerevan State University, Yerevan, Armenia
3
School of Physics and Astronomy, Monash University, Clayton, Australia
4
SIA, Sapienza Universita di Roma, Rome, Italy
Received:
24
July
2024
Accepted:
3
September
2024
Published online:
13
September
2024
The star cluster surrounding the supermassive black hole in the center of Milky Way is probed using the data on the S2 star. The value of precession found at the physics-informed neural networks (PINN) analysis of the S2 data is used to consider the role of the scattering of S2 star on stars of the cluster, described by a random force given by the Holtsmark distribution. The critical value for the star density of the core cluster for which the observed precession value by PINN lies inside 70% confidence interval (between 15 and 
quantiles) around the median of precession due to scattering, is obtained as 
, that is at higher star densities the perturbation of the orbit of S2 would exceed the observed one.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
