Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"galactic dynamics"”.
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Basis Sets in Galactic Dynamics
… basis sets have become a popular tool in galactic dynamics. They provide a method of solving Poisson's equation that scales linearly with the number of particles in a galaxy or halo simulation, and have also received wide attention in the perturbation theory of disk galaxies. This thesis …
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Galactic dynamics : multiple tracers and gravitational lensing
… masses. The combined treatment of photometry and dynamics yields appreciable insight even when the data are not enough to justify more elaborate modelling techniques.
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Hamiltonian chaos: from galactic dynamics to plasma physics
… GALI method as a valuable tool for studying the dynamics of plasma physics models. Next, we study the evolution of phase space structures in a three-dimensional (3D) barred galactic potential, following successive 2D and 3D pitchfork and period-doubling bifurcations of periodic orbits. By …
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New results from the gravitational lensing of galaxies
… h = 0. We also use these lenses as a probe of galactic dynamics, finding constraints which are consistent with those obtained via other methods.
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Cosmology of hidden sector with Higgs portal
… also studied with relic density bounds, BBN and galactic dynamics constraints. Several discussions on phase transitions and alternative dark matter candidates are included.
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Chemodynamics of the Galactic Halo
… science, which is now commonly referred to as Galactic Archaeology. Chapter 1 introduces all the core concepts necessary to understanding the science and results presented in this thesis. This includes a brief introduction to general galaxy formation, an overview of the Milky Way, an …
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A spectral and timing study of MAXI J1820+070 during outburst
… the BHXBs play a pivotal role in shaping galactic dynamics and evolution in their neighbourhood. Among the myriad BHXBs, MAXI J1820+070 stands out as a particularly intriguing target. This low-mass X-ray binary, located in the constellation Ophiuchus, garnered attention due to its …
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Formation and dynamics of the Galactic disc and halo
… 1 I give an overview of the principles of Galactic dynamics which form the foundation of this thesis. I proceed to outline past research into Galactic archaeology in the Milky Way, including studies into its substructure, evolution and accretion history. Chapter 2 is a study of the …
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Secular Dynamics of Binaries in Stellar Clusters
… focus of modern research in astrophysical dynamics. In this thesis we consider the secular evolution of binaries driven by the tidal gravitational field of an arbitrary axisymmetric host system ('cluster') in which the binary moves. We formulate the most general possible theory of …
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Phase-Space Distributions of Galactic Dark Matter Halos and Implications for Detection
<p>This work focuses on models of galactic dark matter halos and observational prospects. We investigate the impact of careful computation of the phase-space density and velocity distribution of weakly-interacting massive particles, a major class of dark matter particle candidates, in the Milky …
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Galactic Dark Matter
… phase-space distribution and properties of Galactic dark matter necessary for its direct and indirect detection are currently unknown. Since the distributions of normal and dark matter in the Milky Way are coupled to each other as they both move in the same gravitational potential, …
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Black holes and how to find them : on the detection of compact objects at several scales
This dissertation is structured in four chapters. First, the reader is introduced to current detection methods for astrophysical black holes at different scales. The following three chapters correspond to different research projects regarding black hole detection. The second chapter presents the …
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Open cluster groups and complexes
… the chemical homogeneity over large areas in the Galactic disk. They would also define an additional level in the hierarchy of star formation and could be used as tracers for the scales of fragmentation in giant molecular clouds? Furthermore, open cluster groups and complexes could affect Galactic …
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Phase Space Structure of Disequilibrium in the Milky Way
Following Gaia Data Release 2, observations of spiral structure in the vertical phase space of the Milky Way have been made. In this thesis we set out to explain these structures, using a combination of analytic modeling, simulations, and Dynamic Mode Decomposition to study explicitly their …