Ultralight bosons can affect the dynamics of spinning black holes (BHs) via superradiant
instability, which can lead to a time evolution of the supermassive BH shadow. We study …

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 …

Abstract The Event Horizon Telescope (EHT) Collaboration recently published the first
images of the supermassive black holes in the cores of the Messier 87 and Milky Way …

The motion of S2, one of the stars closest to the Galactic Centre, has been measured
accurately and used to study the compact object at the centre of the Milky Way. It is …

Gravitational atoms produced from the superradiant extraction of rotational energy of
spinning black holes can reach energy densities significantly higher than that of dark matter …

Precise measurements of the stellar orbits around Sagittarius A* have established the
existence of a supermassive black hole (SMBH) at the Galactic centre (GC). Due to the …

We investigate the precessing and periodic orbits of a test timelike particle around the black-
bounce-Reissner–Nordström spacetime which is characterized by its charge and bounce …

The hitherto unprecedented angular resolution of the Event Horizon Telescope has created
exciting opportunities in the search for new physics. Recently, the linear polarization of …

Context. The Schwarzschild precession of star S2, which orbits the massive black hole at the
centre of the Milky Way, has recently been detected with the result of∼ 12 arcmin per orbit …

In this paper, we investigate the gravitational lensing effect for the Schwarzschild-like black
hole space-time in the background of a Kalb-Ramond (KR) field proposed by Yang et …