89 citations · 619 across the 37 of their papers we have counts for
28 papers · 1 filter
Gravitational Wave Signatures of Periodic Orbits around a Schwarzschild-like Black Holes Submerged in an Exponential Density Dark Matter Profile
Mohammad Reza Alipour, Saeed Noori Gashti, Mohammad Ali S. Afshar +1
We study a Schwarzschild-like black hole embedded in an exponential-sphere (ESM) dark matter halo, characterized by a halo mass and a scale radius . We first show that t…
Geometry-Induced Termination of the Repetitive Penrose Process in Rotating Simpson-Visser Black Holes
Mohammad Ali S. Afshar, Mohammad Reza Alipour, Saeed Noori Gashti +1
We examine the Repetitive Penrose Process in the rotating Simpson-Visser spacetime, whose parameter space includes regular black holes, black-bounce geometries, and traversable wor…
Periodic Orbits and Gravitational Wave Signatures around the Bonanno--Reuter Regular Black Hole
Mohammad Reza Alipour, Mohammad Ali S. Afshar, Saeed Noori Gashti +2
Timelike geodesics, periodic orbits, and their associated gravitational-wave signatures are examined in the spacetime of a Bonanno--Reuter regular black hole, a geometry arising fr…
Repetitive Penrose Process in Rotating 4D Einstein-Gauss-Bonnet Black Holes
Mohammad Reza Alipour, Mohammad Ali S. Afshar, Saeed Noori Gashti
We investigate the repetitive Penrose process for neutral particles in a rotating four-dimensional Einstein--Gauss--Bonnet black hole obtained through the modified Newman--Janis al…
Beyond the Bounce: Multiple Tidal Sign Reversals and Turning-Point Bifurcations in Multi-Horizon Black Holes
Mohammad Ali S. Afshar, J. Sadeghi
We investigate the radial motion and tidal forces experienced by neutral test particles in multi-horizon black hole solutions arising from Einstein gravity coupled to nonlinear ele…
Repetitive Penrose process for charged particles in Kerr-Newman black holes
Mohammad Reza Alipour, Saeed Noori Gashti, Mohammad Ali S. Afshar
We investigate the repetitive Penrose process for charged particles in an initially extremal Kerr--Newman black hole and develop a nonlinear iterative framework in which the black-…
Thermodynamic Topology and Photon Spheres Analysis of Black Holes in Brane-World: Insights from Barrow Entropy
Usman Zafar, Abdul Jawad, Kazuharu Bamba +4
We explore the thermodynamics and geothermodynamics of black holes with Barrow entropy in a brane-world scenario, where the horizon geometry of the black hole is regarded as a frac…
Testing the Weak Gravity Conjecture via Gravitational Lensing, Black Hole Shadows, and Barrow Thermodynamics in F(R)-Euler-Heisenberg (A)dS Black Holes
Saeed Noori Gashti, Izzet Sakalli, Erdem Sucu +5
We investigate the interplay of the Weak Gravity Conjecture (WGC) and the Weak Cosmic Censorship Conjecture (WCCC) in -Euler-Heisenberg black holes in Anti-de Sitter and de S…
The Influence of Stable Photon Sphere Advent on Orbital Precession in moving towards the Extremality
Mohammad Ali S. Afshar, J. Sadeghi
In this work, we investigate the behaviour of the periapsis shift in static charged black-hole spacetimes, focusing on the interplay between extremality and the Aschenbach-like eff…
Probing the Weak Gravity Conjecture: Novel Aschenbach Signatures in Superextremal Non-Linear Charged AdS Black Holes
Mohammad Reza Alipour, Mohammad Ali S Afshar, Saeed Noori Gashti +2
This study investigates the nonlinear charged Anti-de Sitter (AdS) black hole solution within the framework of massive gravity, motivated by recent advancements linking the Weak Gr…
Can Static Black Holes in Massive Gravity Serve as Candidates for Aschenbach-Like Phenomena?
Mohammad Ali S. Afshar, Jafar Sadeghi, Tahereh Azizi +1
The Aschenbach effect is widely regarded as a manifestation of two quintessential relativistic features: frame dragging and extreme spacetime curvature. Traditionally associated wi…
Overcoming Barriers: Kramers' Escape Rate Analysis of Metastable Dynamics in First-Order Multi-Phase Transitions
Mohammad Ali S. Afshar, Saeed Noori Gashti, Mohammad Reza Alipour +1
The expanding application of classical thermodynamic methods to black hole physics has yielded significant advances in characterizing phase transition behavior. Among these approac…
Topological Insights into Black Hole Thermodynamics: Non-Extensive Entropy in CFT framework
Mohammad Ali S. Afshar, Mohammad Reza Alipour, Saeed Noori Gashti +1
In this paper, We conducted an in-depth investigation into the thermodynamic topology of Einstein-Gauss-Bonnet black holes within the framework of Conformal Field Theory (CFT), con…
Mechanisms Behind the Aschenbach Effect in Non-Rotating Black Hole Spacetime
Mohammad Ali S. Afshar, Jafar Sadeghi
General relativity predicts that a rotating black hole drags the spacetime due to its spin. This effect can influence the motion of nearby objects, causing them to either fall into…
Mutual Influence of Photon Sphere and Non-Commutative Parameter in Various Non-Commutative Black Holes: Part I- Towards evidence for WGC
Mohammad Ali S. Afshar, Jafar Sadeghi
Non-commutative black holes(NCBH), due to the non-commutativity of spacetime coordinates, lead to a modification of the spacetime metric. By replacing the Dirac delta function with…
Exploring the Parameter Space of Inflation Model on the Brane and its Compatibility with the Swampland Conjectures
Saeed Noori Gashti, Mohammad Reza Alipour, Mohammad Ali S. Afshar
In recent years, inflationary models have been studied from different perspectives using different conditions. Now, in this paper, we want to investigate the inverse monomial Infla…
Thermodynamic topology of Black Holes in -Euler-Heisenberg gravity's Rainbow
Yassine Sekhmani, Saeed Noori Gashti, Mohammad Ali S. Afshar +4
The topology of black hole thermodynamics is a fascinating area of study that explores the connections between thermodynamic properties and topological features of black holes. We…
Thermodynamic Topology of Quantum Corrected AdS-Reissner-Nordstrom Black Holes in Kiselev Spacetime
Jafar Sadeghi, Saeed Noori Gashti, Mohammad Reza Alipour +1
In this paper, we delve into the intricate thermodynamic topology of quantum-corrected Anti-de Sitter-Reissner-Nordstrm (AdS-RN) black hole within the framework of Kiselev spacetim…
Exploring the Phase Transition in Charged Gauss-Bonnet Black Holes: A Holographic Thermodynamics Perspectives
Jafar Sadeghi, Mohammad Reza Alipour, Mohammad Ali S. Afshar +1
In this paper, we delve into the study of thermodynamics and phase transition of charged Gauss-Bonnet black holes within the context of anti-de Sitter (AdS) space, with particular…
Phase Transition Dynamics of Black Holes Influenced by Kaniadakis and Barrow Statistics
Jafar Sadeghi, Mohammad Ali S. Afshar, Mohammad Reza Alipour +1
In this study, we investigate the dynamics and frame-by-frame phase transition of the first order in black hole thermodynamics. For our analysis, we will utilize the Kramers escape…
The Role of Topological Photon Spheres in Constraining the Parameters of Black Holes
Jafar Sadeghi, Mohammad Ali S. Afshar
In this paper, we investigate the topological photon sphere from two distinct perspectives. In the first view, we examine the existence and characteristics of topological photon(an…
Effective Potential and Topological Photon Spheres: A Novel Approach to Black Hole Parameter Classification
Mohammad Ali S. Afshar, Jafar Sadeghi
In this paper, we base our analysis on the assumption that the existence of a photon sphere is an intrinsic feature of any ultra-compact gravitational structure with spherical symm…
Kramer's Escape Rate and Phase Transition Dynamics in AdS Black Holes
Mohammad Ali S. Afshar, Saeed Noori Gashti, Mohammad Reza Alipour +1
Traditional static methods in phase transition studies, provide good insights into the thermodynamics of black holes. However, they practically lose sight of the dynamic aspects an…
Investigation of hidden symmetry in black hole with Heun equation
Jafar Sadeghi, Mohammad Ali S. Afshar, Mohammad Reza Alipour +1
Investigating the existence of algebra and finding hidden symmetries in physical systems is one of the most important aspects for understanding their behavior and predicting their…