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 52 for “"Type Ia"”.
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Type Ia supernovae as tools for cosmology
Includes abstract. Includes bibliographical references (leaves 95-100).
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LUMINOSITY DISTRIBUTIONS AND ABUNDANCE TOMOGRAPHY MODELLING OF TYPE IA SUPERNOVAE
I present an investigation into Type Ia Supernovae (SNe Ia). The aim of this investigation is to explain the physics and diversity of SNe Ia, motivated by the fact that, although SNe Ia are known to come from a thermonuclear explosion of a C+O Chandrasekhar mass (Ch-mass) White Dwarf (WD), their …
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The type IA supernova rate in intermediate redshift galaxy clusters
Studies of Type Ia supernovae (SNe Ia) in galaxy clusters can tell us about the metal enrichment of the intra-cluster medium, constrain the star formation history of cluster galaxies, aid us in the investigations of the progenitor systems of SNe Ia, act as tracers of the intra-cluster stellar …
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Hierarchical Bayesian Models for Investigating Astrophysical Systematics in Type Ia Supernova Cosmology
Type Ia supernovae (SNe Ia) are stellar explosions, and standardisable candles, used to estimate luminosity distances and constrain cosmological parameters. With increasing SN Ia sample sizes (≳ 1000 objects), systematic uncertainties in SN distance estimates now dominate inferences in SN …
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Cosmic expansion in homogeneous and inhomogeneous universes : supernovae type Ia as cosmic probes
… of recombination. We fit the model to supernova type Ia data and check the consistency of the result with other observations. For parameter values that are consistent with observations, the braneworld model is indistinguishable from a [Lambda]CDM universe as far as the considered cosmological …
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Type IA topoisomerases: a phylogenomic and biochemical analysis of Methanosarcina acetivorans C2A TopoIII
… of the ω protein, eventually renamed to Escherichia coli Topoisomerase I (EcoTopoI), by Prof. James C Wang opened the door to the previously unknown world of molecular machines that manipulate DNA topology. Since then, topoisomerases have been demonstrated to be vital instruments of the cellular …
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Understanding Type Ia Supernovae Through Their Host Galaxies Using the SDSS-II Supernova Survey
… of dark energy was made possible by the study of Type Ia supernovae. These thermonuclear explosions of white dwarfs are excellent standardizable candles that can be seen out to great distances and used to constrain cosmological parameters. However, in an era when modern surveys are discovering …
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The fates of binary companions in Type Ia supernovae within the single-degenerate scenario
Type Ia supernovae (SNe~Ia) are thought to be caused by thermonuclear explosions of carbon-oxygen white dwarfs in close binary systems. However, the nature of the progenitor systems is still uncertain. In the single-degenerate scenario (SDS), the companion star is non-degenerate and can be …
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Cosmology Using Photometric Samples of Type Ia Supernovae: The First Joint Photometric Light Curve Analysis
<p>Over the last twenty five years, type Ia supernova (SNIa) have been a crucial cosmological probe, responsible for the discovery of the accelerating expansion of the universe. But with the dawn of the next generation of telescopes and SNIa samples, new methods and techniques are needed to …
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Metabolic Control, Quality of Life, and Body Image In Patients With Glycogen Storage Disease Type Ia
… is a group of inborn errors of metabolism, with type Ia being the most common form of the disorder. Glycogen storage disease type Ia (GSDIa) is a multisystemic condition in which individuals have various complications secondary to an inability to properly break down glycogen and to perform …
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Multi-dimensional Monte Carlo radiative transfer simulations: investigating the double detonation scenario for type Ia supernovae
Type Ia supernovae (SNe Ia) are still poorly understood, despite being widely-studied across many fields of astrophysics. Explosion simulations have shown that sub-Chandrasekhar mass white dwarfs are promising candidates for the progenitors of SNe Ia, and can reproduce a number of the observed …
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Hierarchical Bayesian Spectro-temporal Models of Type Ia Supernovae in the Optical and Near-Infrared: Understanding the Properties of Dust in Supernova Host Galaxies
… Grace Roman Space Telescope both on the horizon, Type Ia supernova (SN Ia) cosmology is about to undergo a paradigm shift. Whilst this new era has the potential to bring unprecedented constraints on the nature of dark energy, this will only be possible if we are able to overcome the considerable …
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SALT spectroscopy and classification of supernova spectra using Bayesian techniques
… These were classified using a new Bayesian Supernova spectra classifier, SuperNovaMC, that we developed to address limitations with existing algorithms. SuperNovaMC simultaneously finds the best fitting supernova and host galaxy using Bayesian model selection, fitting the entire spectrum …
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Optical fibre sensors and their interrogation
… in the fabrication and understanding of type IA fibre Bragg gratings, the uses of said gratings as optical sensors and the interrogation of optical sensors using tilted fibre Bragg gratings. This thesis presents the most detailed study of type IA gratings performed to date and provides …
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Interstate arrangements for managing fisheries on inland border waters
… arrangements was developed and used to differentiate these along two dimensions -- type of agreement and type of management framework. Fifty-five of the 81 watered borders were covered by a Type IA arrangement that is negotiated directly between two states and does not establish an autonomous …
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Unravelling the nature of hydrogen-poor thermonuclear supernovae
… by the increasing evidence of diversity among type Ia supernovae, particularly at early times, and subclasses of peculiar objects. This thesis presents new observations and modelling tools that explore the diversity of thermonuclear supernovae. We present colour light curves, and optical and …
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Investigating the presence and properties of circumstellar material in Type I Supernovae
… seek to answer the role that circumstellar material plays in both core-collapse and thermonuclear supernovae, including its effects on single objects both in the generation of spectroscopic signatures and additional luminosity through interaction with supernova ejecta. As well as the information …
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Cloning and characterisation of gonadotropin-releasing hormone (GnRH) receptors in the cichlid (Haplochromis burtoni) and the zebrafish (Danio rerio)
… GnRHs demonstrate distinct patterns of spatial expression within the brain, suggesting they may have separate functions. In addition to being the primary regulator of gonadotropin secretion in vertebrates, GnRH is also involved in the release of GH and prolactin and may fulfil a possible …
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The core collapse supernova rate in the sdss-ii supernova survey
… Survey (SDSS-II SN), though designed as a type Ia supernova search for cosmology, also discovered a large sample of core collapse supernovae (CCSN). I use the SDSS-II SN data to measure the volumetric CCSN rate in the redshift range (0.03 < z < 0.09), finding a volume-averaged rate of …
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