45 citations · 142 across the 16 of their papers we have counts for
6 papers · 1 filter
Effective reheating in Gauss--Bonnet inflation with coupling
Ali Seidabadi, Sara Saghafi, Kourosh Nozari
We study effective reheating in a scalar--Gauss--Bonnet inflationary model with a phase-space-dependent coupling , in which a compact field-space feature is combined with a…
Probing Quantum Gravity through Chaotic Orbits and Strong-Field Effects in Kerr Black Holes Embedded in Perfect Fluid Dark Matter
Shubham Kala, Sara Saghafi, M. Yousaf +4
We study the nonlinear photon dynamics in quantum improved rotating black hole surrounded by perfect fluid dark matter (PFDM) using several methods of analysis, including Poincaré…
Higher Dimensional Loop Quantum Black hole in de Sitter Spacetime: Quasinormal Modes and Shadow Signatures
Sara Saghafi, Kourosh Nozari, Ali Mohammadpour
We investigate the dynamical and optical properties of a higher-dimensional loop-quantum-corrected black hole in a de Sitter background. We first analyze the horizon structure and…
Thin Accretion Disks around Rotating Charged Black Holes in an Effective Higher-Curvature Spacetime
Mohammad Hassani, Kourosh Nozari, Sara Saghafi
We investigate the structure and emission properties of a thin accretion disk around a rotating charged black hole described by an effective higher-curvature-inspired spacetime, co…
Beyond : Gauss--Bonnet inflation with
Ali Seidabadi, Sara Saghafi, Kourosh Nozari
Gauss--Bonnet inflation typically affects the dynamics over an extended portion of the trajectory, making it difficult to isolate a controlled imprint at CMB scales. We consider a…
Phenomenological Rotating Extension of Black Holes with Primary Scalar Hair: Shadow Signatures in Beyond Horndeski Gravity
Kourosh Nozari, Milad Hajebrahimi, Sara Saghafi +2
The Event Horizon Telescope (EHT) image of M87* provides a direct test of strong-field gravity, measuring an angular shadow diameter and a circularity…