Astrophysical: Plages

  • Publication
    Active Region Magnetic Fields. I. Plage Fields
    We present observations taken with the Advanced Stokes Polarimeter (ASP) in active-region plages and study the frequency distribution of the magnetic field...
  • Publication
    An active region filament studied simultaneously in the chromosphere and photosphere. II. Doppler velocities<xref ref-type="fn" rid="FN1">
    Context. Paper I presents the magnetic structure, inferred for the photosphere and the chromosphere, of a filament that developed in active region (AR) NOAA...
  • Publication
    Analysis of spatially deconvolved polar faculae
    Polar faculae are bright features that can be detected in solar limb observations and they are related to magnetic field concentrations. Although there are a...
  • Publication
    Atmosphere Dynamics of the Active Region NOAA 11024
    We present results of the study of chromospheric and photospheric line-of-sight velocity fields in the young active region NOAA 11024. Multi-layer, multi...
  • Publication
    Dynamics of an enhanced network region observed in Hα
    This investigation is based on Hα observations of high spatial resolution. They stem from an enhanced network region near disk centre of the sun and consist of...
  • Publication
    Explanation of the activity sensitivity of Mn I 5394.7 Å
    There is a long-standing debate why the Mn i 5394.7 Å line in the solar irradiance spectrum brightens more at higher activity than other photospheric lines. The...
  • Publication
    Exploring the Sun's upper atmosphere with neural networks: Reversed patterns and the hot wall effect
    We have developed an inversion procedure designed for high-resolution solar spectro-polarimeters, such as those of Hinode and the DKIST. The procedure is based...
  • Publication
    G-Band Spectral Synthesis in Solar Magnetic Concentrations
    Narrowband imaging in the G band is commonly used to trace the small magnetic field concentrations of the Sun, although the mechanism that makes them bright has...
  • Publication
    Infrared Photometry of Solar Photospheric Structures. I. Active Regions at the Center of the Disk
    Simultaneous time series of broadband images of two active regions close to the disk center were acquired at the Swedish Vacuum Solar Telescope, La Palma, in...