Astrophysical: Sunspots

  • 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
    Numerical Simulations of Conversion to Alfvén Waves in Sunspots
    We study the conversion of fast magnetoacoustic waves to Alfvén waves by means of 2.5D numerical simulations in a sunspot-like magnetic configuration. A fast...
  • Publication
    Observation and interpretation of the asymmetric Stokes Q, U, and V line profiles in sunspots
    We present a first approach to systematic characterization and interpretation of observed asymmetries of Stokes profiles as a function of spatial position...
  • Publication
    Observation and Modeling of Anomalous CN Polarization Profiles Produced by the Molecular Paschen-Back Effect in Sunspots
    We report novel spectropolarimetric observations of sunspots carried out with the Tenerife Infrared Polarimeter in a near-IR spectral region around 15410 Å...
  • Publication
    Observations of the birth and fine structure of sunspot penumbrae
    High resolution white-light pictures of sunspot penumbrae are presented. These include pictures showing details of their filamentary structure and some...
  • Publication
    Observations of umbral flashes in the resonant sunspot chromosphere
    Context. In sunspot umbrae, the core of some chromospheric lines exhibits periodic brightness enhancements known as umbral flashes. The consensus is that they...
  • Publication
    Observed differences between large and small sunspots
    We confirm recent results about the differences in temperature and magnetic field strength between the umbra of large and small sunspots. Five Stokes I- and V...
  • Publication
    On the age dependence of the asymmetry of penumbrae of sunspot
    The age dependence of the recently described asymmetry of penumbrae of large stable sunspots was analyzed. Young sunspots showed shorter eastern penumbrae...
  • Publication
    On the continuum intensity-magnetic field relation along the decay phase of sunspots
    A continuum intensity-magnetic field distributions are presented for a decaying sunspot. It is shown that a very simple model accounts for the observed...