Substructure, Dynamics and Evolution in Clusters of Galaxies
Author | : Christina Marie Bird |
Publisher | : |
Total Pages | : 488 |
Release | : 1993 |
Genre | : Galaxies |
ISBN | : |
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Author | : Christina Marie Bird |
Publisher | : |
Total Pages | : 488 |
Release | : 1993 |
Genre | : Galaxies |
ISBN | : |
Author | : Florence Durret |
Publisher | : Atlantica Séguier Frontières |
Total Pages | : 464 |
Release | : 1994 |
Genre | : Astrophysics |
ISBN | : 9782863321676 |
Author | : |
Publisher | : |
Total Pages | : 880 |
Release | : 1994 |
Genre | : Aeronautics |
ISBN | : |
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author | : Manolis Plionis |
Publisher | : Springer |
Total Pages | : 476 |
Release | : 2008-02-17 |
Genre | : Science |
ISBN | : 1402069413 |
The reviews presented in this volume cover a huge range of cluster of galaxies topics. Readers will find the book essential reading on subjects such as the physics of the ICM gas, the internal cluster dynamics, and the detection of clusters using different observational techniques. The expert chapter authors also cover the huge advances being made in analytical or numerical modeling of clusters, weak and strong lensing effects, and the large scale structure as traced by clusters.
Author | : Brian Curtis Hart |
Publisher | : |
Total Pages | : 326 |
Release | : 2008 |
Genre | : |
ISBN | : 9780549410812 |
Evolution of global morphology of galaxy clusters as seen in the X-rays was measured, using a variety of morphological measures at different radii, and by accounting for Poisson noise in images. Ellipticities and the multipole-moment power ratios of Buote & Tsai (1995,1996), were used. The power ratios PR2, PR3, PR 4, and PRpk 1 served to quantify morphology. A sample of 143 galaxy clusters at redshifts 0.1028
Author | : Seth Adam Cohen |
Publisher | : |
Total Pages | : 170 |
Release | : 2016 |
Genre | : |
ISBN | : |
Galaxy clusters interact with each other through a variety of hydrodynamical and gravitational mechanisms that can both increase and decrease the amount of star formation (SF) present in their member galaxies. Substructure and asymmetry in the distribution and dynamics of cluster galaxies are indicative of past interaction. In this thesis, I study large samples of galaxy clusters to determine if the merging and interaction of clusters preferentially enhances or quenches cluster SF. First, in a sample of 107 nearby clusters in which I measure SF using optical emission lines and substructure using the positions and velocities of member galaxies, I find that clusters with more substructure tend to exhibit more SF, and I reproduce the well-known direct correlation between SF and clustercentric distance and the inverse correlation between SF and density. Second, in a sample of 379 nearby clusters in which I measure SF using WISE photometry and relaxation using the optical surface brightness maps of member galaxies, I find that less relaxed clusters exhibit more SF. These two studies, using different cluster samples and different methods of measuring SF and substructure, arrive at similar conclusions. Finally, I return to the first sample of 107 clusters and introduce the effects of supercluster environment density and morphology into my analysis. I find that clusters in higher-density regions of superclusters exhibit less SF than those at lower densities, a trend preferentially found in filament superclusters. Furthermore, at high densities, clusters in spider superclusters exhibit more SF than those in filament superclusters.
Author | : Steve Phillipps |
Publisher | : John Wiley & Sons |
Total Pages | : 330 |
Release | : 2005-06-17 |
Genre | : Science |
ISBN | : |
The Structure and Evolution of Galaxies is a concise introduction to this fascinating subject providing the reader with the fundamentals in a clear and accessible style. This user-friendly text assumes some prerequisite knowledge of astronomy, with the necessary mathematics kept to a minimum. Beginning with an introduction to the existence of our own external galaxies, the book moves on to discuss how perceptions of galaxy development have changed over time. The three categories of galaxies are then discussed with later chapters considering their formation and evolution. The book concludes with an overview of both current developments in the field and considers the direction of future research. Clear and accessible introduction to this dynamic subject Introduces definitions of key terms and puts them in context Includes current research and future developments in the field Appendix of basic definitions to clarify key concepts An invaluable text for students of astronomy and physics
Author | : Andrea Cimatti |
Publisher | : |
Total Pages | : 588 |
Release | : 2019-10-31 |
Genre | : Science |
ISBN | : 1108770525 |
A comprehensive examination of nearly fourteen billion years of galaxy formation and evolution, from primordial gas to present-day galaxies.