Zobrazeno 1 - 10
of 173
pro vyhledávání: '"Ramadhan, A S"'
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
Autor:
Ashraf, Farhan, Ramadhan, Ranggi S., Mamun, Abdullah Al, Ball, James A.D., Demir, Eralp, Connolley, Thomas, Collins, David M., Mostafavi, Mahmoud, Knowles, David
Publikováno v:
In Acta Materialia 1 October 2024 278
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
Publikováno v:
Phys. Rev. D 104 (2021) 084029
In the context of whether a massive compact object recently observed in the GW190814 event is a neutron star (NS) or not, we have studied the role of the parameters $\kappa$ and $\Lambda_c$ of the Eddington-inspired Born-Infeld (EiBI) gravity theory
Externí odkaz:
http://arxiv.org/abs/2109.05718