Astrophysical: Helioseismology

  • Publication
    The phase function for stellar acoustic oscillations. I - Theory
    The influence of the upper layers of a star on p-mode frequencies can be described asymptotically by means of a phase function, which depends essentially only...
  • Publication
    The physics of the solar core deduced from GOLF and MDI acoustic modes
    We use the recent results on solar acoustic modes coming from GOLF and MDI, to demonstrate that we improve the quality of the inversion of the sound speed and...
  • Publication
    The Polarimetric and Helioseismic Imager on Solar Orbiter
    Aims: This paper describes the Polarimetric and Helioseismic Imager on the Solar Orbiter mission (SO/PHI), the first magnetograph and helioseismology instrument...
  • Publication
    The quasi-biennial periodicity (QBP) in velocity and intensity helioseismic observations. The seismic QBP over solar cycle 23
    Aims: We looked for signatures of quasi-biennial periodicity (QBP) over different phases of solar cycle by means of acoustic modes of oscillation. Low-degree p...
  • Publication
    The Rotation of the Deep Solar Layers
    From the analysis of low-order GOLF+MDI sectoral modes (l
  • Publication
    The rotation of the solar core
    The solar p-mode spectrum of very low l has already been measured with high accuracy for a sufficiently long period of time to permit the search for solar cycle...
  • Publication
    The search for solar gravity modes
    The characteristics of the three different principal data sets that have been extensively analyzed in a search for g-modes (Tenerife, ACRIM, and Stanford) are...
  • Publication
    The Teide Observatory
    The site of the solar spectrometer of the International Research on the Interior of the Sun (IRIS) network, installed in December 1989 in the Teide Observatory...
  • Talk
    The wounded Sun
    The Sun is a magnetic star, not as magnetic as some stars, or as it was when itwas younger, but nonetheless magnetic fields dominate and even construct...