Astrophysical: Plages

  • Publication
    Infrared Photometry of Solar Photospheric Structures. II. Center-to-Limb Variation of Active Regions
    Simultaneous broadband single images and time series of images have been obtained at λ0.8 and λ1.55 μm, which are at the extremes of the continuum absorption...
  • Publication
    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...
  • Publication
    On the Energy Balance of Solar Active Regions
    Ground-based observations of the sunspot irradiance deficit Ψ and the excess by facular regions in the period 1989 June 3-15 are analyzed using photometric...
  • Publication
    Probing downflows in solar magnetic elements: the Fe II test
    In an attempt to assess the physical realism of the plage flux tube model derived by Bellot Rubio, Ruiz Cobo & Collados (cite{brc}, cite{bellot}) we extend its...
  • Publication
    Properties of convective motions in facular regions
    Aims: We study the properties of solar granulation in a facular region from the photosphere up to the lower chromosphere. Our aim is to investigate the...
  • Publication
    Relationships between magnetic foot points and G-band bright structures
    Aims:Magnetic elements are thought to be described by flux tube models, and are well reproduced by MHD simulations. However, these simulations are only...
  • Publication
    Solar Hα excess during Solar Cycle 24 from full-disk filtergrams of the Chromospheric Telescope
    Context. The chromospheric Hα spectral line is a strong line in the spectrum of the Sun and other stars. In the stellar regime, this spectral line is already...
  • Publication
    SUNRISE: Instrument, Mission, Data, and First Results
    The SUNRISE balloon-borne solar observatory consists of a 1 m aperture Gregory telescope, a UV filter imager, an imaging vector polarimeter, an image...
  • Publication
    The effect of stellar activity on the Li I 6708, Na I 5896 and K I 7699 Å lines. A comparison with the Pleiades, field stars and the Sun
    An analytical model has been developed to empirically study the effects of stellar spots and faculae on the observed equivalent widths of Li i 6708, Na i 5896...