Astrophysical: Helioseismology

  • 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
    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...
  • Publication
    Surface Waves in Solar Granulation Observed with SUNRISE
    Solar oscillations are expected to be excited by turbulent flows in the intergranular lanes near the solar surface. Time series recorded by the IMaX instrument...
  • Publication
    SYMPA, a dedicated instrument for Jovian seismology. I. Principle and performance
    Aims:The detection and measurement of acoustic modes on the giant planets of the solar system is of great interest for the study of the internal structure and...
  • Publication
    SYMPA, a dedicated instrument for Jovian seismology. II. Real performance and first results
    Aims: SYMPA is the first instrument dedicated to the observation of free oscillations of Jupiter. Its principles and theoretical performance have been presented...