Astrophysical: Helioseismology

  • Publication
    Misleading variations in estimated rotational frequency splittings of solar p modes: consequences for helioseismology and asteroseismology
    The aim of this paper is to investigate whether there are any 11-yr or quasi-biennial solar-cycle-related variations in solar rotational splitting frequencies...
  • Publication
    Mode visibilities in radial velocity and photometric Sun-as-a-star helioseismic observations
    We analyze more than 5000 days of high-quality Sun-as-a-star, radial velocity GOLF and photometric VIRGO/SPM helioseismic observations to extract precise...
  • Publication
    Modeling of integrated sunlight velocity measurements: The effect of surface darkening by magnetic fields
    It has been known since the work by Claverie et al. (1982) that integrated-sunlight velocities measured with the resonance scattering technique show variations...
  • Publication
    No swan song for Sun-as-a-star helioseismology: Performances of the Solar-SONG prototype for individual mode characterisation
    The GOLF instrument on board SoHO has been in operation for almost 25 years, but the ageing of the instrument has now strongly affected its performance...
  • Publication
    Numerical simulation of propagation of the MHD waves in sunspots
    We present results of numerical 3D simulation of propagation of MHD waves in sunspots. We used two self consistent magnetohydrostatic background models of...
  • Publication
    Observations of solar p-modes with L of not greater than 5
    Results are presented for the sun's radial velocity in integrated sunlight. A resonant scattering spectrometer has been used to determine the frequencies and...
  • Publication
    On the acoustic cut-off frequency of the sun
    Full solar disk observations of radial velocity, obtained with the IRIS network of resonant scattering spectrometers, are used to analyze the acoustic p-mode...
  • Publication
    On the Solar Origin of the Signal at 220.7 μHz: A Possible Component of a g-Mode?
    Gravity modes in the Sun have been the object of a long and difficult search in recent decades. Thanks to the data accumulated with the last generation of...
  • Publication
    On the Spatial Dependence of Low-Degree Solar p-Mode Frequency Shifts from Full-Disk and Resolved-Sun Observations
    We have analyzed low angular degree (low-l) solar p-mode frequency shifts extracted from two types of observations, both made by instruments on board the ESA...