Astrofísicas: Cromosfera solar

  • Publicación
    Formation of the Mg II h and k Polarization Profiles in a Solar Plage Model and Their Suitability to Infer Magnetic Fields
    The Mg II h and k lines are among the strongest in the near-ultraviolet solar spectrum and their line core originates in the upper chromosphere, just below the...
  • Publicación
    Full Stokes-vector Inversion of the Solar Mg II h and k Lines
    The polarization of the Mg II h and k resonance lines is the result of the joint action of scattering processes and the magnetic field–induced Hanle, Zeeman...
  • Publicación
    High-frequency Wave Propagation Along a Spicule Observed by CLASP
    The Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) sounding rocket experiment, launched in 2015 September, observed the hydrogen Lyα line (121.6 nm) in...
  • Charla
    Introduction of new postdocs. (1) Astroparticle In AMS-02: the way to combine astrophysics and particle physics; (2) Brown dwarf disks in the TW Hydrae association; (3) Understanding the solar chromosphere from polarization of hydrogen lines
    (1) Astroparticle In AMS-02: the way to combine astrophysics and particle physics. Jonathan Pochon AMS-02 is a typical particle detector designed for space...
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    Limitations of the Ca II 8542 Å Line for the Determination of Magnetic Field Oscillations
    Chromospheric umbral oscillations produce periodic brightenings in the core of some spectral lines, known as umbral flashes. They are also accompanied by...
  • Publicación
    Magnetic Field Information in the Near-ultraviolet Fe II Lines of the CLASP2 Space Experiment
    We investigate theoretically the circular polarization signals induced by the Zeeman effect in the Fe II lines of the 279.3-280.7 nm spectral range of the...
  • Publicación
    Mapping the Longitudinal Magnetic Field in the Atmosphere of an Active Region Plage from the Inversion of the Near-ultraviolet CLASP2.1 Spectropolarimetric Data
    We apply the HanleRT Tenerife Inversion Code to the spectropolarimetric observations obtained by the Chromospheric Layer Spectropolarimeter. This suborbital...
  • Publicación
    Multiline Stokes Synthesis of Ellerman Bombs: Obtaining Seamless Information from Photosphere to Chromosphere
    Magnetic reconnection in the lower atmosphere is a critical process in determining the chromospheric dynamics, such as Ellerman bombs and UV bursts. Because the...
  • Charla
    Mysteries of the magnetic Sun
    The Sun presents us with many unsolved mysteries. In this talk I discuss three of them that have intrigued me for the last 50 years. Solar flares are the most...