35 citations · 89 across the 11 of their papers we have counts for
11 papers
Hidden Connections: Tracing the BCG Stellar Mass-Halo Mass Relation in the SDSS-GalWCat19 Cluster Catalog
Mohamed H. Abdullah, Rasha M. Samir, Nouran E. Abdelhamid +5
The stellar-to-halo mass (SMHM) relation of brightest cluster galaxies (BCGs) provides key insight into the connection between BCG growth and the assembly of their host halos. We a…
The changing material around (2060) Chiron from an occultation on 2022 December 15
J. L. Ortiz, C. L. Pereira, B. Sicardy +30
We could accurately predict the shadow path and successfully observe an occultation of a bright star by Chiron on 2022 December 15. The Kottamia Astronomical Observatory in Egypt d…
Nustar observation of the binary system 4U 0114+65
Mohammed H. Abdallah, Rasha M. Samir, Denis A. Leahy +1
The high mass X-ray binary system 4U 0114+65 was observed by Nustar in October 2019, and by XMM-Newton in August 2015. Here we performed spectral and timing analysis of the Nustar…
Cosmographic analysis of a closed bouncing universe with the varying cosmological constant in gravity
Vinod Kumar Bhardwaj, Anirudh Pradhan, Nasr Ahmed +1
Modeling of matter bounce in gravity has been presented with no violation of the null energy condition. Only a closed universe with negative pressure is allowed in good ag…
Stability Analysis of Relativistic Polytropes
A. S. Saad, M. I. Nouh, A. A. Shaker +1
A main question in astrophysics and cosmology has been the severe stability of the astrophysical objects, whether a particular equilibrium configuration is stable. In this article,…
Possible Relations between Brightest Central Galaxies and Their Host Galaxies Clusters and Groups
R. M. Samir, A. A. Shaker
The r-band of the Sloan Digital Sky Survey (SDSS) for 17,924 brightest cluster galaxies (BCGs) in clusters and groups within 0.02 z 0.20 are used to study possible environmental re…