11 citations · 27 across the 5 of their papers we have counts for
7 papers
The Contribution of Mergers and Accretion to Dark Matter Halo Assembly: An Excursion Set Theory Approach
Hamed Kameli
We study the relative contributions of mergers and accretion to the assembly of dark matter haloes within the framework of Excursion Set Theory (EST). We extend a variance-discreti…
Localized Enhancements of the Primordial Power Spectrum and the Abundance of Early Bright Galaxies
Shaghayegh Yavari, Hamed Kameli, Shant Baghram
Recent observations of bright galaxies at high redshifts by the James Webb Space Telescope have motivated renewed interest in cosmological mechanisms that can enhance the abundance…
Addressing the too-big-to-fail problem and the void phenomenon through a modified initial power spectrum
Hamed Kameli, Shant Baghram
We investigate the impact of early-time initial conditions on nonlinear structure formation and evolution within the framework of the semi-analytical Excursion Set Theory (EST). Ou…
Voids and Halos in Voids statistics as a probe of the Expansion History of the Universe
Laya Parkavousi, Hamed Kameli, Shant Baghram
Structures in the Universe are arranged into the cosmic web. Distributions, statistics, and evolutions of the structures can be used as probes for cosmological models. We investiga…
Primordial Black Holes in the Excursion Set Theory
Encieh Erfani, Hamed Kameli, Shant Baghram
We study primordial black holes (PBHs) formation in the excursion set theory (EST) in a vast range of PBHs masses with and without confirmed constraints on their abundance. In this…
Mass assembly history of dark matter halos in the light of tension
Hamed Kameli, Shant Baghram
The Hubble tension may introduce a new course of action to revise the standard CDM model to unravel dark energy and dark matter physics. The Hubble parameter can be reconstructe…
Modified initial power spectrum and too big to fail problem
Hamed Kameli, Shant Baghram
The galactic scale challenges of dark matter such as "missing satellite" problem and "too big to fail" problem are the main caveats of standard model of cosmology. These challenges…