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.
Results
Showing 1 to 9 of 9 for “"Stellar dynamics"”.
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Binary evolution in stellar dynamics
Computational studies of the classical gravitational N-body problem have demonstrated the importance in bound systems of energetic binaries formed dynamically. Since analytic and some numerical studies generally neglect three-body interactions, by which these form, it is desirable to establish what …
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Layer-layer interactions in atmospheric, cryospheric, and stellar dynamics
… mechanics, and turbulence in velocity-layered stellar interiors. Three distinct manifestations of stratosphere-troposphere coupling are studied in this dissertation. First, evidence suggests that ozone depletion has driven changes in southern hemisphere tropical tropospheric width, motivating …
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Stellar Dynamics in the Outer Galactic Disk under the Influence of a Central Bar
… galaxy on the velocity distribution in the outer stellar disk, which is thought to arise mostly via resonant phenomena. For this, we numerically integrate orbits of a large number of sample points in a 2D model potential consisting of a rotating bar component in an axisymmetric background. Central …
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Dynamics of dense gas-star systems : Black holes and their precursors
… thesis embraces several aspects of theoretical stellar dynamics in clusters, both analytically and numerically. We try to elucidate the phenomena currently observed in all types of galaxies, including AGNs and quasars, some of the most powerful objects in the universe. The interactions between …
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Understanding the Milky Way with Stars
… Such growth is evidenced by the differences in stellar structures found in the Galaxy over the last few decades, accelerated most recently by the Gaia space mission. Yet, we still lack a full picture of the formation of the Milky Way and its stellar components, and we are even further in …
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The Astrometric Contribution of Unresolved Stellar Companions
No astronomical body is alone - some fraction of the mass of a system will always be found in orbiting bodies, ranging from fragmented debris to planets, stars and compact objects. In general we ‘see’ the brighter component: one star often dominates the detectable light, obscuring the companion - …
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Dense stellar systems and massive black holes
… MBH are the fact that (a) compact stars and stellar-mass black holes can gradually inspiral into the SMBH due to the emission of gravitational radiation, which is known as an “Extreme Mass Ratio Inspiral” (EMRI), and (b) stars can produce gases which will be accreted by the SMBH through …
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Crowded field spectroscopy and the search for intermediate-mass black holes in globular clusters
… These black holes would bridge the gap from stellar mass black holes, that represent the final stage in the evolution of massive stars, to supermassive ones that reside in the centres of galaxies. For this reason, they are referred to as intermediate-mass black holes. The most reliable method …
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The influence of stellar birth environment on protoplanetary disc dispersal
… that they are in fact influenced by their stellar neighbours. In this dissertation I focus primarily on two mechanisms by which discs evolving in close proximity to other stars might be truncated and dispersed by their neighbours. These are tidal truncation by star-disc encounters and …