28 citations · 81 across the 9 of their papers we have counts for
10 papers
Axial Perturbations of Extended Tolman III in the New Theory
B. N. Jayawiguna, G. A. Sabian, H. S. Ramadhan +1
We investigate compact objects using the extended Tolman III equation of state in the framework of gravity. In the matter sector of the Lagrangian density, we employ…
Two descriptions of dark matter around a black hole: photon sphere, shadow, and lensing
M. F. Fauzi, H. S. Ramadhan, A. Sulaksono
We examine the observational discrepancies of two widely used models describing anisotropic (dark) matter distributions around a black hole, focusing on their photon spheres, shado…
Shadow images of regular black hole with finite boundary
M. F. Fauzi, H. S. Ramadhan, A. Sulaksono
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 mo…
Anisotropic gravastar as horizonless regular black hole spacetime and its images illuminated by thin accretion disk
M. F. Fauzi, H. S. Ramadhan, A. Sulaksono
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 co…
Hidden BPS states of electroweak monopole and a new bound estimate
A. Gunawan, H. S. Ramadhan, I. Prasetyo
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 li…
Compact Object and Neutron Stars within Eddington-Inspired Born-Infeld Theory of Gravity
I. Prasetyo, H. Maulana, H. S. Ramadhan +1
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 and o…
An Ultra-compact Object from Semi-classical Gravity
I. Prasetyo, H. S. Ramadhan, A. Sulaksono
In a recent report, Carballo-Rubio [1] utilizes the semi-classical theory of gravity to obtain a generalized Tolman-Oppenheimer-Volkoff (TOV) equation. This model has a new couplin…
Compactness, masses and radii of compact stars within the Eddington-inspired Born-Infeld theory
A. I. Qauli, A. Sulaksono, H. S. Ramadhan +1
We investigate the compactness, masses and radii of realistic neutron stars (NSs) and quark stars (QSs) within the Eddington-inspired Born-Infeld (EiBI) theory of gravity, and the…
Neutron stars in the braneworld within the Eddington-inspired Born-Infeld gravity
I. Prasetyo, I. Husin, A. I. Qauli +2
We propose the disappearance of "the hyperon puzzle" in neutron star (NS) by invoking two new-physics prescriptions: modified gravity theory and braneworld scenario. By assuming th…
Hyperons in neutron stars within Eddington-inspired Born-Infeld theory of gravity
A. I. Qauli, M. Iqbal, A. Sulaksono +1
We investigate the mass-radius relation of neutron star (NS) with hyperons inside its core by using the Eddington-inspired Born-Infeld (EiBI) theory of gravity. The equation of sta…