Journal: Astronomy and Astrophysics

  • 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...
  • Publication
    Early detection of the optical counterpart to GRB 980329
    We report optical observations of the GRB 980329 error box which represent the second earliest detection of the GRB 980329 optical transient. We determine R =...
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    Early-type dwarf galaxies with multicomponent stellar structure: Are they remnants of disc galaxies strongly transformed by their environment?
    Context. The surface brightness distribution of ~30-40% of the early-type dwarf galaxies with - 18 ≤ MB ≤ -15 in the Virgo and the Coma clusters is fitted by...
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    Eclipse of the B3V companion and flaring of emission lines in V838 Monocerotis
    After four years during which only the spectacular light echo was showing continuous and rapid evolution while the central star was nearly constant, in autumn...
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    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...
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    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 internal waves on the solar neutrino flux
    The neutrino production rate strongly depends on the temperature, and a small variation of chemical composition in the central regions can imply a large...
  • 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...
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    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...