10 citations · 19 across the 8 of their papers we have counts for
9 papers
From Cluster Core to Splashback: Linking Dynamical Structure to Multidimensional Galaxy Evolution in the Coma Cluster
Mohamed H. Abdullah, S. W. El-Sogheir, Gillian Wilson +2
We investigate galaxy evolution across the full dynamical structure of the Coma cluster using the GalWCat19 spectroscopic cluster catalog combined with SDSS-based value-added galax…
Structure and Evolution of Multi-Cluster within Galactic Disc: Gaia DR3 Insights into Eight Open Clusters
A. Ahmed, W. H. Elsanhoury, D. C. Çınar +3
In this study, we present a comprehensive analysis of the structural, astrophysical, and dynamical properties of eight open clusters: NGC 559, NGC 1817, NGC 2141, NGC 7245, Ruprech…
Tracing the Galactic Disk with Gaia DR3: A Deep Study of Berkeley 17, 18, and 39 Open Star Clusters
A. Ahmed, W. H. Elsanhoury, D. C. Çınar +4
We report a detailed investigation of three intermediate-to-old age open clusters, Berkeley 17, Berkeley 18, and Berkeley 39, utilizing precise astrometric and photometric data fro…
Galaxy Cluster Detection and Dynamical Analysis in the VIPERS High-Redshift Spectroscopic Survey
Mohamed H. Abdullah, Omnia I. Adly, Gillian Wilson +2
We present a dynamical analysis of galaxy clusters identified in the VIPERS spectroscopic survey within the redshift range 0.5 <= z <= 1.2. Cluster candidates were first detected a…
Deep Photometric and Astrometric Investigation of the Non-relaxed Star Cluster Stock 3 using Gaia DR3
A. Ahmed, Amira R. Youssef, M. S. El-Nawawy +1
The study presents both photometric and kinematic analyses of the non-relaxed open cluster Stock 3 with Gaia DR3 which found to be positioned at 2.945 0.700 kpc and having an…
An in-depth analysis of the differentially expanding star cluster Stock 18 (Villafranca O-036) using Gaia DR3 and ground-based data
J. Maíz Apellániz, A. R. Youssef, M. S. El-Nawawy +4
(ABRIDGED) CONTEXT: The Villafranca project is combining Gaia data with ground-based surveys to analyze Galactic stellar groups with OB stars. AIMS: We want to analyze Stock 18 wit…
the impact of the AGN and the torus properties on the evolution of spiral galaxies
M. A. Abdulrahman, K. A. K. Gadallah, A. Ahmed +1
For spiral galaxies, the active galactic nucleus (AGN) and some physical parameters that concern the host galaxy such as spiral arm radius and density can play an important role in…
Non-LTE Equivalent Widths for NII with Error Estimates
A. Ahmed, T. A. A. Sigut
Non-LTE calculations are performed for NII in stellar atmospheric models appropriate to main sequence B-stars to produce new grids of equivalent widths for the strongest NII lines…
The Temperature Structure of Be Star Disks in the Small Magellanic Cloud
A. Ahmed, T. A. A. Sigut
The temperature structure of Be star circumstellar disks at the sub-solar metallicity appropriate to the Small Magellanic Cloud (SMC) is investigated. It is found that for central…