Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Ramadhan, H S"'
Regular black hole is one of the bottom-up solutions designed to eliminate the singularity at the center of black holes. Its horizonless solution has gained interest recently to model ultracompact star. Despite interesting, this proposal is problemat
Externí odkaz:
http://arxiv.org/abs/2411.16241
Publikováno v:
Eur.Phys.J.C 84 (2024) 11, 1145
A connection between regular black holes and horizonless ultracompact objects was proposed in~\cite{Carballo-Rubio:2022nuj}. In this paper, we construct a model of a horizonless compact object, specifically an anisotropic gravastar with continuous pr
Externí odkaz:
http://arxiv.org/abs/2411.12358
In this paper, we intend to investigate the dynamics of the Circular Restricted Three-Body Problem. Here we assumed the primaries as the source of radiation and have variable mass. The gravitational perturbation from disk-like structure are also cons
Externí odkaz:
http://arxiv.org/abs/2408.00272
Autor:
Putra, Leonardus B., Ramadhan, H. S.
We derive the metric of a circular chiral vorton in the weak field limit. The object is self-supporting by means of its chiral current. A conical singularity with deficit angle, identical to that of straight string with the same linear mass density,
Externí odkaz:
http://arxiv.org/abs/2407.05270
We conduct a comprehensive study on spherical orbits around two types of black holes: Kerr-Newman black holes, which are charged, and Ghosh black holes, which are nonsingular. In this work, we consider both null and timelike cases of orbits. Utilizin
Externí odkaz:
http://arxiv.org/abs/2404.17277
Using the BPS Lagrangian method, we obtain a distinct set of Bogomolny equations for the Cho-Maison monopoles from the bosonic sector of a regularized electroweak theory. In the limit of $n\rightarrow\infty$ of the permittivity regulator, $\epsilon\l
Externí odkaz:
http://arxiv.org/abs/2404.08881
Autor:
Acalapati, E., Ramadhan, H. S.
We apply the {\it first-order formalism} method to obtaining BPS equations for Alice string. This is done by generalizing the well-known first-order formalism to the case of non-Abelian strings. We do not assume any specific gauge group nor the shape
Externí odkaz:
http://arxiv.org/abs/2303.11541
We study nonsingular black holes viewed from the point of view of Ayon-Beato-Garcia (ABG) nonlinear electrodynamics (NLED) and present a complete study of their corresponding strong gravitational lensing. The NLED modifies the the photon's geodesic,
Externí odkaz:
http://arxiv.org/abs/2303.10921
Autor:
Habibina, A S., Ramadhan, H. S.
We study the geodesics of $5d$ Reissner-Nordstrom and nonsingular black strings, and establish a rational bound orbit taxonomy for both massive as well as null test particles. For the timelike case, test particles with high energy (that would have ma
Externí odkaz:
http://arxiv.org/abs/2205.14635
Publikováno v:
Phys. Rev. D 104, 124045 (2021)
It is well-known that black hole can be endowed with topological charge coming as a result of phase transition(s) in the early universe. It has also recently been revealed that such object might exist in one of the modified theory of gravity called t
Externí odkaz:
http://arxiv.org/abs/2112.08889