Light rings and light points of boson stars

Abstract

This work is devoted to the study of photon trajectories around rotating boson stars. The basic properties of boson star models are given with a particular emphasis on the high compactness those objects can have. Using an effective potential method, circular orbits of photons around rotating boson stars are then obtained, at least for relativistic enough configurations. A particular class of light rings, in which the photons are at rest on a stable orbit, is exhibited. By this one means that the associated worldline is collinear to the Killing vector corresponding to the asymptotic time translation symmetry. It is proposed to call those orbits light points. Their existence is very specific to boson stars and the link between light points and ergoregions is investigated.

References in corpus (5)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• Light rings as observational evidence for event horizons: long-lived modes, ergoregions and nonlinear instabilities of ultracompact objects
• Chaotic lensing around boson stars and Kerr black holes with scalar hair
• Models of rotating boson stars and geodesics around them: new type of orbits
• Spherical Boson Stars as Black Hole mimickers

Cited by in corpus (22)

• Testing the nature of dark compact objects: a status report
• The imitation game: Proca stars that can mimic the Schwarzschild shadow
• Geometric modeling of M87* as a Kerr black hole or a non-Kerr compact object
• Review of non-topological solitons in theories with $U(1)$-symmetry
• The Role of Topological Photon Spheres in Constraining the Parameters of Black Holes
• Rotating Axion Boson Stars
• Comparing timelike geodesics around a Kerr black hole and a boson star
• Circular Orbits Structure and Thin Accretion Disks around Kerr Black Holes with Scalar Hair
• Static Orbits in Rotating Spacetimes
• On instabilities of scalar hairy regular compact reflecting stars
• Gravitational-Wave Data Analysis with High-Precision Numerical Relativity Simulations of Boson Star mergers
• Weak Gravity Conjecture Validation with Photon Spheres of Quantum Corrected AdS-Reissner-Nordstrom Black Holes in Kiselev Spacetime
• Black hole photon ring beyond General Relativity: an integrable parametrization
• Motion of test particle in rotating boson star
• Tidal effects in the motion of gas clouds around boson stars
• Evanescent ergosurface instability
• Equatorial orbits of spinning test particle in rotating boson star
• Gravitational systems in asymptotically anti-de Sitter space-times
• Slowly Rotating Boson Stars
• On instabilities of stationary scalar field configurations supported by reflecting compact stars
• Sagittarius A* near-infrared flares polarization as a probe of space-time I: Non-rotating exotic compact objects
• There and back again: Outspiraling motion in non-Kerr compact objects