Astrophysical: Magnetic fields

  • Publication
    Dynamo action in turbulent flows
    We present results from numerical simulations of nonlinear MHD dynamo action produced by three-dimensional flows that become turbulent for high values of the...
  • Talk
    Dynamos, the drivers of solar and stellar activity
    Following Cowling's anti-dynamo theorem of 1933, there was a long period during which the very existence of dynamos was unclear. Even with the emergence of...
  • Publication
    Effect of coronal structure on loop oscillations
    Aims.We investigate the influence of longitudinal structuring of the surrounding corona on the modes of oscillation of a coronal magnetic flux tube. Methods: .A...
  • Publication
    Effect of coronal structure on loop oscillations: exponential profiles
    Aims:The role of longitudinal structuring of the surrounding corona on the modes of oscillation of a coronal magnetic flux tube was studied in Donnelly et al....
  • Publication
    Effect of longitudinal density structure on a straight magnetic field modelling coronal arcade oscillations
    Aims:Motivated by recent observations of oscillations in coronal arcades, we investigate analytically the influence of longitudinal structuring on the modes of...
  • Publication
    Effect of partial ionization on wave propagation in solar magnetic flux tubes
    Observations show that waves are ubiquitous in the solar atmosphere and may play an important role for plasma heating. The study of waves in the solar corona is...
  • Publication
    Elusive Magnetic Structures in the Sun and Solar-Type Stars
    The magnetic structures of the Sun are very inhomogeneous, with irregularities smaller than the smallest sizes that we resolve from Earth. Such irregularities...
  • Publication
    Emergence of magnetic flux from the convection zone into the corona
    Numerical experiments of the emergence of magnetic flux from the uppermost layers of the solar interior to the photosphere and its further eruption into the low...
  • Publication
    Emergence of magnetic flux sheets in the quiet Sun: I. Statistical properties
    Context. Small-scale magnetic flux emergence in the quiet Sun is crucial for maintaining solar magnetic activity. On the smallest scales studied so far, namely...