156 citations · 1.1k across the 74 of their papers we have counts for
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Toward Gravitational Lensing in Modified Theories of Gravity
Ali Tizfahm, Saeed Fakhry, Javad T. Firouzjaee +1
In this study, we investigate gravitational lensing within modified gravity frameworks, focusing on the Hu-Sawicki and normal branch Dvali-Gabadadze-Porrati (nDGP) models, a…
A note on the stability of the Cauchy horizon in regular black holes without mass inflation
Mohsen Khodadi, Javad T. Firouzjaee
Unlike generic models of regular black holes (BHs) with nonzero surface gravity on both Cauchy and event horizons, an inner-degenerate counterpart with zero Cauchy horizon surface…
Event Horizon Telescope observations exclude compact objects in baseline mimetic gravity
Mohsen Khodadi, Sunny Vagnozzi, Javad T. Firouzjaee
Mimetic gravity has gained significant appeal in cosmological contexts, but static spherically symmetric space-times within the baseline theory are highly non-trivial: the two natu…
Dynamical dark energy confronted with multiple CMB missions
Mahdi Najafi, Supriya Pan, Eleonora Di Valentino +1
The measurements of the cosmic microwave background (CMB) have played a significant role in understanding the nature of dark energy. In this article, we investigate the dynamics of…
Robust Preference for Dynamical Dark Energy in DESI BAO and SN Measurements
William Giarè, Mahdi Najafi, Supriya Pan +2
Recent Baryon Acoustic Oscillation (BAO) measurements released by DESI, when combined with Cosmic Microwave Background (CMB) data from Planck and two different samples of Type Ia s…
Gravitational Lensing in More Realistic Dark Matter Halo Models
Ali Tizfahm, Saeed Fakhry, Javad T. Firouzjaee +1
In this study, we explore gravitational lensing using more realistic dark matter halo models, moving beyond the limitations of spherical-collapse approximations. Through analytical…
Accretion Efficiency Evolution of Central Supermassive Black Holes in Quasars
Arta Khosravi, Alireza Karamzadeh, Seyed Sajad Tabasi +1
The ongoing debate regarding the most accurate accretion model for supermassive black holes at the center of quasars has remained a contentious issue in astrophysics. One significa…
Structure Formation in Various Dynamical Dark Energy Scenarios
Masoume Reyhani, Mahdi Najafi, Javad T. Firouzjaee +1
This research investigates the impact of the nature of Dark Energy (DE) on structure formation, focusing on the matter power spectrum and the Integrated Sachs-Wolfe effect (ISW). B…