28 citations · 81 across the 9 of their papers we have counts for
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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…
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…