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 20 of 24 for “"hydrodynamical simulations"”.
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Hydrodynamical simulations of dust traps in protoplanetary disks
Las teorías actuales de formación planetaria concuerdan que los planetas se forman dentro de discos de gas y polvo alrededor de una estrella jóven. Sin embargo, no es claro cuál es el mecanismo detrás de la formación planetaria. Entre los mecanismos propuestos podemos encontrar que se podrían …
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Quenching of Star Formation in the Local Universe A Comparison of Hydrodynamical Simulations with Spectroscopic Observations
… from three state-of-the-art cosmological simulations: EAGLE, Illustris and IllustrisTNG. Our machine learning (ML) classification reveals supermassive black hole mass (MBH) as the most predictive parameter in determining whether a galaxy is star forming or quenched at redshift z = 0 in all …
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Comparing Simulations and Observations of Galaxy Evolution: Methods for Constraining the Nature of Stellar Feedback
Computational hydrodynamical simulations are a very useful tool for understanding how galaxies form and evolve over cosmological timescales not easily revealed through observations. However, they are only useful if they reproduce the sorts of galaxies that we see in the real universe. One of the …
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Galaxy clusters as astrophysical laboratories and probes of cosmology
… This motivates a campaign of large cosmological hydrodynamical simulations, with plausible 'sub-grid' prescriptions for the relevant galaxy formation physics.This thesis presents a new suite of large-volume cosmological hydrodynamical simulations called cosmo-OWLS. They form an extension to the …
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Structure and Local Properties of Dark Matter Halos
… the departure from the SHM by analyzing hydrodynamical simulations of Milky Way (MW) like halos to characterize the impact on local properties of DM induced by satellite galaxies like the Large Magellanic Cloud (LMC) and their implications for direct detection experiments.
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Illustris-TNG Simulated Central Black Mass(MBH) and Galaxy Properties Correlations with a Machine Learning Approach
… the bulge’s velocity dispersion. Cosmolog- ical hydrodynamical simulations can capture most of these correlations, but it is yet not understood why this occurs. To gain greater insight into central black hole growth we use machine learning algorithms to study the relationship between central …
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The kinematic and thermal Sunyaev-Zel'dovich effects as probes of cosmology and astrophysics
… sample. I compare the extracted signal to simulations and find good agreement with respect to the signal-to-noise, the constraint on the optical depth, and the corresponding gas fraction. I next study the potential of the kSZ effect as a probe of cosmology, again focussing on the pairwise …
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A Search For Warm-Hot Intergalactic Matter in the Local Sheet of Galaxies
… with latitude and comparing the results to hydrodynamical simulations, strong constraints have been placed on the properties of the WHIM. With a hydrogen number density equal to that predicted by the simulations, the upper limit to the oxygen abundance for the WHIM in the Local Sheet must be …
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The Environment Of Galaxies And Groups Of Galaxies
… tools - semi- analytical models and N-body plus hydrodynamical simulations of large scale structure and individual galaxies - to explore the underlying physics governing the formation and evolution of groups of galaxies, and the role of environment in generating polar structures around disk …
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AGN outflows and the cluster cooling flow conundrum
… overview of the theory and design philosophy of hydrodynamical simulations and a hydrodynamical code called FLASH, which was created by Fryxell et al. (2000). This code is expanded with gravity and AGN outflow units to support the simulation of a pair of outflows in the intracluster medium whilst …
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Connecting simulations and observations in galaxy formation studies
… formation and evolution. On the other hand, hydrodynamical simulations of galaxy formation in cosmological context are able to follow the evolution of a galaxy along cosmic time, taking into account both external processes such as mergers, interactions and accretion, and internal mechanisms …
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A detailed view of filaments and sheets of the warm-hot intergalactic medium
… for by observational means. Numerical simulations predict that these missing baryons could reside in the filaments and sheets of the cosmic web at high temperatures of T = 10^4.5 - 10^7 K, but only at low to intermediate densities, and constitutes the warm-hot intergalactic medium …
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Spectroscopic studies of star-forming galaxies and the intergalactic medium in the early Universe
… to Cosmic Reionisation. Using cosmological hydrodynamical simulations, I consider the prospects of mapping the intergalactic medium (IGM) in the most prominent hydrogen emission line, Lyman-α. Turning to observations, I present and analyse multiple spectroscopic datasets of individual …
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The Role of Baryons and Neutrinos in the Evolution of Large-Scale Structure
… these necessitates the use of large cosmological hydrodynamical simulations with realistic ‘sub-grid’ prescriptions for baryonic physics. One mechanism in need of addressing is the effect of the cosmic background of massive neutrinos. As these remain relativistic to relatively late times, they …
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Cosmology with Velocity Dispersion based Counts of Groups and the Effect of AGN Feedback on Host Galaxy Morphology
… the aid of the BAHAMAS suite of cosmological hydrodynamical simulations, I demonstrate the potential of the velocity dispersion counts for discriminating even similar ΛCDM models. Then, I compare the abundance of groups in the GAMA survey to the predictions from BAHAMAS to constrain the values …
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The effects of stochastic forces on the evolution of planetary systems and Saturn's rings
… HD128311 and HD45364 are presented. N-body simulations of two planets and two dimensional hydrodynamical simulations of proto-planetary discs are used to realistically model the convergent migration phase and the capture into resonance. The results indicate that the proto-planetary disc …
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Exploring Galaxy Clusters and Groups with Cosmological Simulations
… (FABLE) project, a new suite of cosmological hydrodynamical simulations of galaxies, groups and clusters designed to further our understanding of the formation and evolution of these fascinating objects. Firstly I perform a detailed comparison of the FABLE simulations to low-redshift …
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From Spheres to Sheets: Colloidal Hydrodynamics, Thermodynamics, and Statistical Inference
… sampling algorithms, and the use of hydrodynamical simulations to better understand the physics of soft matter systems consisting of particles ranging in shape from spheres to sheets. In the first part of this thesis, we introduce a Bayesian method that we call Maximum A posteriori …
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Chemodynamical Properties of Simulated Late-type Galaxies
… and dwarf - using a suite of cosmological hydrodynamical simulations, which incorporate the nucleosynthetic pollution of the interstellar medium, supplemented with classical analytical models of Local Group dwarfs. Throughout the work, these models are confronted with extant observations of …
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