arXiv subjects

Yong-Jin Han

Publications and source records attributed to Yong-Jin Han.

2 recordsLinked to original sources

arXiv2017

Inner-most stable circular orbit in Kerr-MOG black hole

We study the inner-most stable circular orbit(ISCO) of Kerr black hole in MOdified gravity(Kerr-MOG black hole) which is one of the exact solution of the field equation of modified gravity in strong gravity regime. Kerr-MOG black hole is constructed commonly known kerr metric in Boyer-Lindquist coordinate by adding repulsive parameter like Yukawa force which explained in quantum gravity. We explore what is some differences of the ISCOs of Kerr-MOG black hole and kerr black hole.

gr-qc↗

arXiv2016

Embedded Diagrams of Kerr and Non-Kerr black Holes

Embedded diagrams are drawn for investigating the black hole of Kerr and non-Kerr metric. Kerr black holes are characterized by masses $M$ and spin parameters $a$. Non-Kerr black holes also are characterized by the deformation parameters $ε$, which is related to shape of the black hole, in addition to their masses and spins. In this paper, we investigate the behavior of non-Kerr black holes compared with Kerr black holes in the parameter space of ($a$,$ε$) using embedded diagrams. The event horizons and the naked singularity of non-Kerr BHs are discussed in detail.

gr-qc↗