2018/06/26 by Jian-Ping Hu, Yu Zhang, Li-Li Shi +1 · 14 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Black Holes and Theoretical Physics #Black hole (networking) #Circular orbit #Differential geometry #Geodesic #Null (SQL) #Precession #Relativity and Gravitational Theory #Rotating black hole #gr-qc
paper · pdf · doi:10.1007/s10714-018-2411-3
published in General Relativity and Gravitation 50(7) (Springer Science+Business Media) · 19 pages,16 figures
openalex publication_date 2018/06/26 · openalex created_date 2018/07/10 · arxiv created 2021/04/15 · arxiv updated 2021/04/16 · openalex updated_date 2026/08/05
The regular Hayward model describes a non-singular black hole space-time. By analyzing the behaviors of effective potential and solving the equation of orbital motion, we investigate the time-like and null geodesics in the regular Hayward black hole space-time. Through detailed analyses of corresponding effective potentials for massive particles and photons, all possible orbits are numerically simulated. The results show that there may exist four orbital types in the time-like geodesics structure: planetary orbits, circular orbits, escape orbits and absorbing orbits. In addition, when ℓ, a convenient encoding of the central energy density 3/8πℓ2, is 0.6M, and b is 3.9512M as a specific value of angular momentum, escape orbits exist only under b>3.9512M. The precession direction is also associated with values of b. With b=3.70M the bound orbits shift clockwise but counter-clockwise with b=5.00M in the regular Hayward black hole space-time. We also find that the structure of null geodesics is simpler than that of time-like geodesics. There only exist three kinds of orbits (unstable circle orbits, escape orbits and absorbing orbits).