Abstract The Galactic Center (GC) of the Milky Way, thanks to its proximity, allows to perform
astronomical observations that investigate physical phenomena at the edge of astrophysics …

We demonstrate that short-period stars orbiting around the supermassive black hole in our
Galactic center can successfully be used to probe the gravitational theory in a strong regime …

Extended gravity is widely constrained in different astrophysical and astronomical systems.
Since these different systems are based on different scales it is not trivial to get a combined …

Using an algebraic condition of vanishing discriminant for multiple roots of fourth-degree
polynomials, we derive an analytical expression of a shadow size as a function of a charge …

In this paper, we derive the solutions of orbit equations for a class of naked singularity
spacetimes and compare these with timelike orbits, that is, particle trajectories in the …

We investigate scalar-tensor theories, motivated by dark energy models, in the strong gravity
regime around the black hole at the center of our galaxy. In such theories general relativity is …

We consider possible signatures for Yukawa gravity within the Galactic Central Parsec,
based on our analysis of the S2 star orbital precession around the massive compact dark …

Precise measurements of the S-stars orbiting SgrA* have set strong constraints on the
nature of the compact object at the centre of the Milky Way. The presence of a black hole in …

Alternative theories of gravity may serve to overcome several shortcomings of the standard
cosmological model but, in their weak field limit, general relativity must be recovered so as to …

After giving a short overview of previous results on constraining of Extended Gravity by
stellar orbits, we discuss the Schwarzschild orbital precession of S2 star assuming the …