Gravitational Lensing of Rays through the Levitating Atmospheres of Compact Objects
arXiv:1701.05693 · doi:10.3390/universe3010003
Abstract
Electromagnetic rays travel on curved paths under the influence of gravity. When a dispersive optical medium is included, these trajectories are frequency-dependent. In this work we consider the behaviour of rays when a spherically symmetric, luminous compact object described by the Schwarzschild metric is surrounded by an optically thin shell of plasma supported by radiation pressure. Such levitating atmospheres occupy a position of stable radial equilibrium, where radiative flux and gravitational effects are balanced. Using general relativity and an inhomogeneous plasma we find the existence of a stable circular orbit within the atmospheric shell for low-frequency rays. We explore families of bound orbits that exist between the shell and the compact object, and identify sets of novel periodic orbits. Finally, we examine conditions necessary for the trapping and escape of low-frequency radiation.
Invited contribution to Universe, special issue "Gravitational Lensing and Astrometry", academic eds. Valerio Bozza, Francesco De Paolis and Achille A. Nucita. 16 pages, 7 figures. Comments welcome: [email protected]
References in corpus (7)
- Relativistic images of Schwarzschild black hole lensing
- A Periodic Table for Black Hole Orbits
- Frequency-dependent effects of gravitational lensing within plasma
- Gravitational lensing in a non-uniform plasma
- Gravitational radiospectrometer
- Escape and Trapping of Low-Frequency Gravitationally Lensed Rays by Compact Objects within Plasma
- A state-dependent influence of the type-I bursts on the accretion in 4U 1608--52?
Cited by in corpus (18)
- Calculating black hole shadows: Review of analytical studies
- Gravitational Lensing in presence of Plasma: Strong Lens Systems, Black Hole Lensing and Shadow
- Shadow analysis for rotating black holes in the presence of plasma for an expanding universe
- Two families of astrophysical diverging lens models
- Higher order corrections to deflection angle of massive particles and light rays in plasma media for stationary spacetimes using the Gauss-Bonnet theorem
- Motion of Particles and Gravitational Lensing Around (2+1)-dimensional BTZ black holes in Gauss-Bonnet Gravity
- Deflection of light rays by spherically symmetric black hole in dispersive medium
- Hills and holes in the microlensing light curve due to plasma environment around gravitational lens
- Strong deflection limit analysis of black hole lensing in inhomogeneous plasma
- Weak Deflection angle and Shadow by Tidal Charged Black Hole
- Qualifying ringdown and shadow of black holes under general parametrized metrics with photon orbits
- Time delay induced by plasma in strong lens systems
- Analytical expressions for pulse profile of neutron stars in plasma environments
- Dual-Component Plasma Lens Models
- Binary microlensing with plasma environment -- Star and planet
- Deflection of light rays in a moving medium around a spherically symmetric gravitating object
- Observational signatures of Rotating compact objects in Plasma space-time
- Light deflection in axially symmetric stationary spacetimes filled with a moving medium