Browsing Institutt for teoretisk astrofysikk by Author "Gafeira, Ricardo"

Now showing items 1-5 of 5

  • Diagnostic capabilities of spectropolarimetric observations for understanding solar phenomena: I. Zeeman-sensitive photospheric lines 
    Quintero Noda, Carlos; Barklem, P. S.; Gafeira, Ricardo; Ruiz Cobo, Basilio; Collados, Manuel; Carlsson, Mats; Martinez Pillet, V.; Orozco Suarez, D.; Uitenbroek, Han; Katsukawa, Y. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Future ground-based telescopes will expand our capabilities for simultaneous multi-line polarimetric observations in a wide range of wavelengths, from the near-ultraviolet to the near-infrared. This creates a strong demand ...
  • Machine learning initialization to accelerate Stokes profile inversions 
    Gafeira, Ricardo; Orozco Suarez, D.; Milić, Ivan; Quintero Noda, Carlos; Ruiz Cobo, Basilio; Uitenbroek, Han (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Context. At present, an exponential growth in scientific data from current and upcoming solar observatories is expected. Most of the data consist of high spatial and temporal resolution cubes of Stokes profiles taken in ...
  • Morphological Properties of Slender Ca II H Fibrils Observed by SUNRISE II 
    Gafeira, Ricardo; Lagg, A.; Solanki, S. K.; Jafarzadeh, Shahin; van Noort, M.; Barthol, P.; Blanco Rodriguez, J.; del Toro Iniesta, J. C.; Gandorfer, A.; Gizon, L; Hirzberger, J.; Knölker, M.; Orozco Suarez, D.; Riethmüller, T. L.; Schmidt, W. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We use seeing-free high spatial resolution Ca ii H data obtained by the Sunrise observatory to determine properties of slender fibrils in the lower solar chromosphere. In this work we use intensity images taken with the ...
  • Oscillations on Width and Intensity of Slender Ca II H Fibrils from Sunrise/SuFI 
    Gafeira, Ricardo; Jafarzadeh, Shahin; Solanki, S. K.; Lagg, A.; van Noort, M.; Barthol, P.; Blanco Rodriguez, J.; del Toro Iniesta, J. C.; Gandorfer, A.; Gizon, L; Hirzberger, J.; Knölker, M.; Orozco Suarez, D.; Riethmüller, T. L.; Schmidt, W. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    © 2017. The American Astronomical Society. All rights reserved.
  • Transverse Oscillations in Slender Ca II H Fibrils Observed with Sunrise/SuFI 
    Jafarzadeh, Shahin; Solanki, S. K.; Gafeira, Ricardo; van Noort, M.; Barthol, P.; Blanco Rodriguez, J.; del Toro Iniesta, J. C.; Gandorfer, A.; Gizon, L; Hirzberger, J.; Knölker, M.; Orozco Suarez, D.; Riethmüller, T. L.; Schmidt, W. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2017)
    We present observations of transverse oscillations in slender Ca ii H fibrils (SCFs) in the lower solar chromosphere. We use a 1 hr long time series of high- (spatial and temporal-) resolution seeing-free observations in ...