What does lie at the Milky Way centre? Insights from the S2 star orbit precession

@inproceedings{Arguelles2021WhatDL,
  title={What does lie at the Milky Way centre? Insights from the S2 star orbit precession},
  author={Carlos R. Arguelles and Mart{\'i}n Federico Mestre and E. A. Becerra-Vergara and Valentino Crespi and Andreas Krut and Jorge Armando Rueda and R. Ruffini},
  year={2021}
}
It has been recently demonstrated that both, a classical Schwarzschild black hole (BH), and a dense concentration of self-gravitating fermionic dark matter (DM) placed at the Galaxy centre, can explain the precise astrometric data (positions and radial velocities) of the S-stars orbiting Sgr A*. This result encompasses the 17 best resolved S-stars, and includes the test of general relativistic effects such as the gravitational redshift in the S2-star. In addition, the DM model features another… 
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