Astrophysical: Helioseismology

  • Publication
    The low L solar p-mode spectrum at maximum and minimum solar activity
    Velocity measurements of disc integrated sunlight obtained at the Observatorio del Teide (Izana) from 1980 throughout 1989 are used to find the frequencies and...
  • Publication
    The Mark-I helioseismic experiment - I. Measurements of the solar gravitational redshift (1976-2013)
    The resonant scattering solar spectrophotometer `Mark-I', designed and build at the University of Birmingham (UK) and located at the Observatorio del Teide...
  • Publication
    The onset of solar cycle 24. What global acoustic modes are telling us
    We study the response of the low-degree, solar p-mode frequencies to the unusually extended minimum of solar surface activity since 2007. A total of 4768 days...
  • Publication
    The p-mode spectrum measured in intensity: from 1996 to 2000
    VIRGO-SPM is a helioseismic instrument on board SOHO that observe the disk-integrated sunlight irradiance at three different colours (red, green and blue). In...
  • 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 return of FarNet-II: Generation of solar far-side magnetograms from helioseismic data
    Context. The far-side activity of the Sun can be inferred by interpreting the near-side wave field using local helioseismic techniques. However, detections are...