Astrophysical: Helioseismology

  • Publication
    Seismic Holography of the Solar Interior near the Maximum and Minimum of Solar Activity
    The base of the convection zone and the tachocline play a major role in the study of the dynamics of the Sun, especially in the solar dynamo. Here, we present a...
  • Publication
    Sensitivity of helioseismic gravity modes to the dynamics of the solar core
    Context: The dynamics of the solar core cannot be properly constrained through the analysis of acoustic oscillation modes. Gravity modes (g modes) are necessary...
  • Publication
    Signature of the solar cycle in the low degree p-modes using Mark-I
    High quality observations of the low degree p-modes exist for almost two complete solar cycles using the solar spectrophotometer Mark-I, located and operating...
  • Publication
    Solar cycle induced variations of the low L solar acoustic spectrum
    Doppler velocity data are used to study solar cycle variation of the frequencies of solar acoustic oscillations from 1977 to 1988. The results show a clear...
  • Publication
    Solar FLAG hare and hounds: on the extraction of rotational p-mode splittings from seismic, Sun-as-a-star data
    We report on results from the first solar Fitting at Low-Angular degree Group (solar FLAG) hare-and-hounds exercise. The group is concerned with the development...
  • Publication
    solarFLAG hare and hounds: estimation of p-mode frequencies from Sun-as-star helioseismology data
    We report on the results of the latest solarFLAG hare-and-hounds exercise, which was concerned with testing methods for extraction of frequencies of low-degree...
  • Publication
    Structure and Dynamics of the Sun's Interior Revealed by the Helioseismic and Magnetic Imager
    High-resolution helioseismology observations with the Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamics Observatory (SDO) provide a unique three...
  • Publication
    Study of p-mode excitation and damping rate variations from IRIS++ observations
    11 years of low degree helioseismic data collected by the IRIS++ network (International Research of the Interior of the Sun) have been analyzed. The epoch...
  • Publication
    Sunspot seismic halos generated by fast MHD wave refraction
    Aims: We suggest an explanation for the high-frequency power excess surrounding active regions known as seismic halos. Methods: We use numerical simulations of...