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Browsing PhD Dissertations by Thesis (Degree/Level) "Doctor of Philosophy in Astronomy"
Now showing items 1-17 of 17
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(Halifax, N.S. : Saint Mary's University, 2011)Information on 72 confirmed or candidate pre-main-sequence [delta]-Scuti stars is collected and analysed to varying degree of sophistication and completeness. A systematic asteroseismic analysis of around 40 of these stars ...
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(Halifax, N.S. : Saint Mary's University, 2013)This thesis presents a new probabilistic method for the asteroseismic analysis of stellar structure and evolution with the goal of providing a universal tool to improve our knowledge of stellar modelling. This new method ...
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(Halifax, N.S. : Saint Mary's University, 2012)Evidence is presented implying that the classical Cepheid VI[subscript c] period-Wesenheit function is relatively insensitive to metallicity. The results indicate that variations in chemical composition among Cepheids are ...
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(Halifax, N.S. : Saint Mary's University, 2017)The field of high-energy AGN astrophysics is about to be transformed as data of unprecedented quality and quantity will be arriving from the next-generation of X-ray observatories. With the advancement of technology, we ...
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(Halifax, N.S. : Saint Mary's University, 2013)Feedback from active galactic nuclei is now widely regarded as playing a fundamental role in modern theories of galaxy formation. Recent research has highlighted that not only may AGN feedback suppress star formation by ...
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(Halifax, N.S. : Saint Mary's University, 2011)SRC variables are evolved stars (mostly M supergiants) that vary in brightness with semi-regular periods ranging from several months to several years. Their light variation is caused by a combination of pulsation, convection, ...
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(Halifax, N.S. : Saint Mary's University, 2018)We present an investigation of McWilliam & Bernstein's 2008 globular cluster (GC) stellar population synthesis method, focusing on the impact of non-local thermodynamic equilibrium (NLTE) modeling effects. For this purpose, ...
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(Halifax, N.S. : Saint Mary's University, 2013)We have developed a three-dimensional radiation hydrodynamics code to simulate the interaction of convection and pulsation in classical variable stars. One key goal is the ability to carry these simulations to full amplitude ...
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(Halifax, N.S. : Saint Mary's University, 2011)In this work, I present the first simulations to investigate the formation and propagation of protostellar jets that simultaneously include the launching mechanism at < 0.1 AU and the much larger observational length scales ...
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(Halifax, N.S. : Saint Mary's University, 2017)We present the first observation of a resonance state in the proton drip-line nucleus [superscript 20]Mg. The resonance state was populated via inelastic scattering of [superscript 20]Mg with a solid deuteron target using ...
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(Halifax, N.S. : Saint Mary's University, 2018)We build a K-selected catalog of z ∼ 1.6 gzKs galaxies in the Deep and Wide fields of the Canada-France-Hawaii Legacy Survey, with a final effective area of 27.6 deg2. This catalog allows us to recover ...
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(Halifax, N.S. : Saint Mary's University, 2020)Galactic fluorine abundance is strongly dependent on the conditions in the astrophysical sites. This feature makes it useful to probe different nucleosynthesis scenarios, mainly in the AGB stars. It is also important in ...
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(Halifax, N.S. : Saint Mary's University, 2008)In this work I investigate the influence of rotation on pulsation frequencies in upper main sequence stars. I use 2D stellar structure models and a 2D linear adiabatic pulsation code to calculate pulsation frequencies for ...
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(Halifax, N.S. : Saint Mary's University, 2013 [i.e. 2012]., 2012)This thesis examines the formation and evolution of cold gaseous structures in galaxies and galactic outflows in two distinct scenarios. Previous analytic estimates of the viscous time-scale due to cloud-cloud collisions ...
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(Halifax, N.S. : Saint Mary's University, 2021)High-velocity outflows in active galactic nuclei usually manifest as either a collimated jet or diffuse wind. These outflows carry a significant amount of energy from the central environment surrounding the supermassive ...
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(Halifax, N.S. : Saint Mary's University, 2016)In this thesis I present a set of scaling relationships for ZAMS rotating models. These relationships are applicable to models whose rotation rate produces a given surface distortion and are shown to be valid for stellar ...
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(Halifax, N.S. : Saint Mary's University, 2017)The determination of galaxy masses is an essential tool for our understanding of galaxy evolution. Looking at 67 local galaxies, we find that galaxy stellar masses are underestimated using traditional methods that assume ...
Now showing items 1-17 of 17