Browsing University of Galway Theses by Subject "Astronomy"
Now showing items 1-16 of 16
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Computational development of a particle-In-cell computer code for the simulation of plasma Instabilities around rotation powered pulsars
(2014-09-03)This thesis reports on the design and development of DYMPHNA3D, a 3D particle-in-cell (PIC) plasma simulation code. It also focuses on the field of radio emission and the discovery of rotation powered neutron stars, ... -
Decoding the kinematic and ionisation structure of axisymmetric nebulae
(NUI Galway, 2021-08-04)The aim of the thesis was to develop a code and pipeline for generating 3D photoionisation models of axisymmetric nebulae to better understand their ob- served structure and composition. This was achieved through a new ... -
Development and Implementation of an Ultra High Speed Astronomical Polarimeter: The Galway Astronomical Stokes Polarimeter (GASP)
(2013-05-12)Optical polarization is a powerful diagnostic tool in astrophysics, allowing the investigation of asymmetries in source regions of astronomical objects, magnetic field configurations, and magnetic field strengths. Polarized ... -
Development of a high time resolution optical polarimeter for astronomy
(NUI Galway, 2018-12-17)This work started in September, 2014 and initially started as an investigation of the characterisation issues associated with using Electron Multiplying Charge- Coupled Devices (EMCCDs) in a two beam polarimeter. It was ... -
High Precision Proper Motions in Globular Star Clusters using Parallel Deconvolution of Hubble Space Telescope Images
(2013-05-24)It has been suggested that globular star clusters may host a black hole with intermediate mass (~ a few × 1000 M_sun ) or a collection of low mass (~ 10 M_sun ) black holes at their centre. High velocity dispersion in the ... -
IMPAIR: Massively parallel regularised Richardson-Lucy deconvolution on heterogeneous hardware
(2017-10-27)This thesis investigates the comparative performance of multicore CPU and general purpose GPU on a commodity desktop computer. To investigate this, an image deconvolution software package (IMPAIR) was updated from its ... -
A morpho-kinematic and spectroscopic study of bipolar planetary nebulae
(2015-09-28)In this thesis, studies of the kinematic properties for a sample of Galactic bipolar planetary nebulae, based on optical and infrared observations, were performed us- ing a morpho–kinematic code, optical and NIR diagnostic ... -
Multi-wavelength and Polarisation Studies of Pulsars: the Crab, Vela, and PSR J0205+6449
(2014-12-11)This thesis outlines the findings of a multi-wavelength and polarimetric study of a number of rotation-powered pulsars. Polarisation studies of pulsars are just one example of obtaining insight into the geometry of their ... -
Multi-wavelength and polarisation studies of pulsars: the crab, vela, and PSR J0205+6449
(2014-12-11)This thesis outlines the findings of a multi-wavelength and polarimetric study of a number of rotation-powered pulsars. Polarisation studies of pulsars are just one example of obtaining insight into the geometry of their ... -
Optical variability in Late-M and Early-L dwarfs
(NUI Galway, 2021-05-05)Brown dwarfs and low-mass stars together comprise the group of galactic objects known as ultracool dwarfs. A number have been detected as radio sources – in some cases, emitting periodic radio pulses synchronised to the ... -
Planet engulfment and the planetary nebula morphology mystery
(NUI Galway, 2018-04-13)This thesis presents an investigation into the galactic population of planetary nebulae (PNe) whose progenitors have evolved through the engulfment of massive planets during the asymptotic giant branch (AGB) phase of their ... -
Polarisation of synchrotron radiation from isolated neutron stars
(2016-03-10)Pulsars are enigmatic neutron stars which have defied efforts to understand them for over 40 years. POREC (Pulsar Optical Reverse Engineering Code) was first written to constrain pulsar emission theories through constraining ... -
Radiative transfer of star formation and destruction regions
(NUI Galway, 2022-12-14)While star formation and destruction may lie at the opposite ends of a star's life cycle, they display remarkable similarities. Both star forming regions and pre-planetary nebulae can be detected by observing molecular ... -
Star formation in extreme environments
(2015-12-22)The study of star formation bridges many vastly disparate scales. From the small, nearby, quiescent cores of low mass star formation, to the highly turbulent conditions in which the most massive stars form, to the extreme ... -
Structure and evolution of classical Nova Shells
(2017-09-22)This thesis focuses on shells ejected during classical nova events. Novae are due to thermonuclear runaway on the surface of a white dwarf in a binary system. The work herein concentrates on nova shells individually to ... -
A study of turbulence and infall over multiple scales of star formation
(2014-09-28)The understanding of the processes of star formation informs the understanding and investigation of questions of galactic dynamics and the formation of stellar systems of exoplanets and so sits between the galactic and ...