Now showing items 1-16 of 16

    • Aspects of MHD wave propagation in solar atmospheric studies 

      Mundie, Cheryl Ann (University of St Andrews, 1998) - Thesis
      The theme of this thesis is ideal linear MHD wave propagation in structured media, using models relevant to structures in the solar atmosphere. We derive dispersion relations governing the ideal linear MHD modes for ...
    • Chromospheric effects on global solar oscillations 

      Johnston, Alan (University of St Andrews, 1994) - Thesis
      A study has been made of the global solar oscillations known as p-modes. The Sun is represented by a plane-parallel stratified plasma. Solutions are found to the magnetohydrodynamic equations of motion in such a plasma, ...
    • Ducted magnetoacoustic waves in the solar corona 

      Smith, Jason M. (University of St Andrews, 1997) - Thesis
      This thesis investigates the ducting of magnetoacoustic waves in coronal structures. The propagation of waves in current sheets and coronal loops has been examined in order to understand wave ducting in structured plasmas, ...
    • Effect of structuring on coronal loop oscillations 

      McEwan, Michael P. (University of St Andrews, 2007-06) - Thesis
      In this Thesis the theoretical understanding of oscillations in coronal structures is developed. In particular, coronal loops are modelled as magnetic slabs of plasma. The effect of introducing inhomogeneities on the ...
    • The effects of magnetic fields on oscillations in the solar atmosphere 

      Evans, David J. (University of St Andrews, 1990) - Thesis
      A study has been made of wave propagation in two regions of the solar atmosphere in which magnetic forces are significant. Sunspot observations indicate a rich variety of characteristic modes of oscillation roughly divided ...
    • Effects of thermal conduction and compressive viscosity on the period ratio of the slow mode 

      Macnamara, Cicely Krystyna; Roberts, Bernard (2010-06) - Journal article
      Aims: Increasing observational evidence of wave modes brings us to a closer understanding of the solar corona. Coronal seismology allows us to combine wave observations and theory to determine otherwise unknown parameters. ...
    • Helioseismology and diagnostics of internal magnetic layers 

      Foullon, Claire-Uriel Armelle Marie Aline (University of St Andrews, 2002-03) - Thesis
      Solar magnetic fields, as well as temperature changes, introduce pressure deviations that play a significant role in modulating the resonant frequencies of p-mode oscillations. Those pressure deviations occurring in the ...
    • The influence of thermal and magnetic layers on solar oscillation frequencies 

      Daniell, Mark (University of St Andrews, 1998) - Thesis
      In this thesis, a study is made of the global solar oscillations known as p-modes, modelled by a plane-parallel stratified plasma, within which is embedded a horizontal layered magnetic field. A magnetohydrodynamic formalism ...
    • Loop oscillations in the corona 

      James, Lorna (University of St Andrews, 2004) - Thesis
      Magnetic loops in the Sun's corona have been discovered to oscillate in a variety of modes. The oscillations are observed to exhibit strong damping. A number of theories have been put forward to explain the damping, including ...
    • Magnetic surface effects on solar oscillations 

      Jain, Rekha (University of St Andrews, 1993) - Thesis
      This thesis is concerned with the effects of magnetic atmospheres on solar oscillations. The behaviour of magnetohydrodynamic surface waves propagating on a single magnetic interface is discussed ignoring the effects of ...
    • Magnetohydrodynamic surface waves in the solar atmosphere 

      Miles, Alan J. (University of St Andrews, 1991) - Thesis
      In this thesis the nature of magnetoacoustic surface waves at a single magnetic interface is examined for the case of parallel propagation. Above the interface is an isothermal medium permeated by a horizontal magnetic ...
    • Magnetohydrodynamic waves in structured atmospheres 

      Edwin, Patricia Mary (University of St Andrews, 1985) - Thesis
      The effect of structuring, in the form of magnetic or density inhomogeneities, on the magnetohydrodynamic (mhd) waves of an infinite plasma is investigated. The appropriate dispersion formulae, in both Cartesian and ...
    • The period ratio P₁/2P₂ in coronal waves 

      Macnamara, Cicely K. (University of St Andrews, 2011-11-30) - Thesis
      Increasing observational evidence of wave modes brings us to a closer understanding of the solar corona. Coronal seismology allows us to combine wave observations and theory to determine otherwise unknown parameters. The ...
    • Solar intense magnetic fields 

      Webb, Andrew Robert (University of St Andrews, 1980) - Thesis
      The nature of motions in intense magnetic fields is investigated. For a flux tube in a uniform atmosphere a dispersion relation is derived for the modes of vibration and analytic approximations are obtained for a slender ...
    • Some aspects of solar flare and prominence theory 

      Milne, Alexander Mitchell (University of St Andrews, 1980) - Thesis
      Solar flares and solar prominences are amongst the best known features of solar activity. Despite this familiarity, however, there are still significant gaps in our knowledge of these phenomena. In this thesis some theoretical ...
    • Theoretical modelling of global oscillations in solar prominences 

      Joarder, Parthasarathi (University of St Andrews, 1994) - Thesis
      This thesis aims to provide a basic theoretical explanation for the oscillatory motions observed in solar quiescent prominences. The prominence is treated as a simple plasma slab embedded in a hotter and rarer uniform ...