A
Amr El-Zant
Researcher at British University in Egypt
Publications - 56
Citations - 1696
Amr El-Zant is an academic researcher from British University in Egypt. The author has contributed to research in topics: Dark matter & Galaxy. The author has an hindex of 16, co-authored 52 publications receiving 1524 citations. Previous affiliations of Amr El-Zant include University of Colorado Boulder & California Institute of Technology.
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Journal ArticleDOI
Dark Halos: The Flattening of the Density Cusp by Dynamical Friction
TL;DR: In this paper, it is shown that the discrepancy between theory and observations can be easily resolved within the standard CDM model, provided that gas is not initially smoothly distributed in the dark matter halo but rather is concentrated in clumps of mass 0.01% of the total mass of the system.
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Flat-cored dark matter in cuspy clusters of galaxies
TL;DR: In this paper, the authors show that the inner dark matter distribution flattens when the b ≈ 0.35 galaxies spiral inward, and that the overall mass distribution remains core-like.
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Large Structures and Galaxy Evolution in COSMOS at z < 1.1
Nick Scoville,H. Aussel,Andrew J. Benson,Andrew Blain,D. Calzetti,Peter Capak,Richard S. Ellis,Amr El-Zant,A. Finoguenov,M. Giavalisco,Luigi Guzzo,G. Hasinger,Jin Koda,O. LeFevre,Richard Massey,H. J. McCracken,Bahram Mobasher,Alvio Renzini,Jason Rhodes,Mara Salvato,D. B. Sanders,Shunji S. Sasaki,Eva Schinnerer,Kartik Sheth,Patrick L. Shopbell,Yoshiaki Taniguchi,James E. Taylor,David Thompson +27 more
TL;DR: In this paper, the authors identify large-scale structures (LSS) at z < 1.1$ in the Cosmic Evolution Survey (COSMOS) using adaptive smoothing of galaxy counts in the pseudo-3D space.
Journal ArticleDOI
Large Structures and Galaxy Evolution in COSMOS at z < 1.1*
Nick Scoville,Nick Scoville,Herve Aussel,Andrew J. Benson,Andrew Blain,Daniela Calzetti,Peter Capak,Richard S. Ellis,Amr El-Zant,Alexis Finoguenov,Mauro Giavalisco,Luigi Guzzo,Günther Hasinger,Jin Koda,O. Le Fevre,Richard Massey,H. J. McCracken,Bahram Mobasher,Alvio Renzini,Alvio Renzini,Jason Rhodes,Jason Rhodes,Mara Salvato,D. B. Sanders,Shunji S. Sasaki,Shunji S. Sasaki,Eva Schinnerer,Kartik Sheth,Patrick L. Shopbell,Yoshiaki Taniguchi,James E. Taylor,David Thompson,David Thompson +32 more
TL;DR: In this article, the first identification of large-scale structures (LSSs) at z 2 was presented, compared to the lower mass galaxies there, and they did not see evolution in the mass of galaxies by more than a factor of 2 separating active and inactive star-forming galaxy populations.
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Dynamical-friction galaxy-gas coupling and cluster cooling flows
TL;DR: In this paper, the authors revisited the notion that galaxy motions can efficiently heat intergalactic gas in the central regions of clusters through dynamical friction and showed that the energy reservoir in galactic motions is sufficient to sustain the required heating rate for the lifetime of the cluster.