Astrophysical: Magnetic fields

  • Publication
    A Peculiar Velocity Pattern in and near the Leading Sunspot of NOAA 10781: Wave Refraction by Large-Scale Magnetic Fields?
    I report observations of unusually strong photospheric and chromospheric velocity oscillations in and near the leading sunspot of NOAA 10781 on 3 July 2005. I...
  • Publication
    A polarization model for the German Vacuum Tower Telescope from in situ and laboratory measurements
    It is essential to properly calibrate the polarimetric properties of telescopes, if one wants to take advantage of the capabilities of high precision spectro...
  • Publication
    A proposal for a low instrumental polarization coude telescope. II. The German Gregory-Coude Telescope at the Observatorio del Teide.
    We have put into practice the technique to minimize the instrumental polarization (IP) of coude telescopes proposed by Martinez Pillet & Sanchez Almeida (1991)...
  • Publication
    A Simple Model for the Distribution of Quiet-Sun Magnetic Field Strengths
    We derive a first-order linear differential equation describing the shape of the probability density function (PDF) of magnetic field strengths in the quiet Sun...
  • Publication
    A study of the capabilities for inferring atmospheric information from high-spatial-resolution simulations
    In this work, we study the accuracy that can be achieved when inferring the atmospheric information from realistic numerical magneto-hydrodynamic simulations...
  • Publication
    A study of the regular structure of the galactic magnetic field using WMAP5 polarization data at 22 GHz
    We study the spatial structure of the 3-dimensional large-scale pattern of the Galactic Magnetic Field using the polarization maps obtained by the WMAP...
  • Publication
    A suite of community tools for spectro-polarimetric analysis .
    The National Center for Atmospheric Research (NCAR) has undertaken a 3-year initiative to develop the Community Spectro-polarimetric Analysis Center (CSAC). The...
  • Publication
    A synthetic stellar polarization atlas from 400 to 1000 nm
    Context: With the development of new polarimeters for large telescopes, the spectro-polarimetric study of astrophysical bodies is becoming feasible and, indeed...
  • Publication
    A Three-dimensional Study of Reconnection, Current Sheets, and Jets Resulting from Magnetic Flux Emergence in the Sun
    We present the results of a set of three-dimensional numerical simulations of magnetic flux emergence from below the photosphere and into the corona. The corona...