7 papers
Investigation of Circular Photon Orbits in Naked Singularity Spacetimes from a Geometric Method
Qing-Rong Xie, Chen-Kai Qiao
Circular photon orbits play a pivotal role in both gravitational theories and astronomical observations. However, the properties of circular photon orbits in naked singularity spac…
Periodic orbits and their gravitational waves in EMRIs: supermassive black hole affected by galactic dark matter halos
Guo-He Li, Chen-Kai Qiao, Jun Tao
Periodic orbits exhibiting zoom-whirl behavior have become attractive topics for studying particle dynamics and gravitational wave emission in extreme-mass-ratio inspirals (EMRIs).…
Orbital Dynamics and Gravitational Wave Signatures of Extreme Mass Ratio Inspirals in Galactic Dark Matter Halos
Guo-He Li, Chen-Kai Qiao, Jun Tao
In astrophysics, extreme mass ratio inspiral (EMRI) systems, which consist of a central supermassive black hole and a stellar-mass compact object (SCO), are typically embedded in g…
Geometric Approach to Light Rings in Axially Symmetric Spacetimes
Chenkai Qiao, Ming Li, Donghui Xie +1
Circular photon orbits have become an attractive topic in recent years. They play extremely important roles in black hole shadows, gravitational lensings, quasi-normal modes, and s…
A General Discussion on Photon Spheres in Different Categories of Spacetimes
Chen-Kai Qiao, Ping Su, Yang Huang
Photon spheres have attracted considerable interest in the studies of black holes and other astrophysical objects. For different categories of spacetimes (or gravitational sources)…
Gravitational Lensing of Euler-Heisenberg Black Hole Surrounded by Perfect Fluid Dark Matter
Ping Su, Chen-Kai Qiao
In this work, we study the gravitational lensing of Euler-Heisenberg black hole surrounded by perfect fluid dark matter. This kind of black hole solution enables us to investigate…