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On the sensitivity of the Halpha scattering polarization to chromospheric magnetism

  1. 1. 0355116 - ASU-R 2011 RIV IT eng J - Journal Article
    Štěpán, Jiří - Trujillo Bueno, J.
    On the sensitivity of the Halpha scattering polarization to chromospheric magnetism.
    Memorie della Societa Astronomica Italiana. Roč. 81, č. 2 (2010), s. 810-813 ISSN 0037-8720.
    [Chromospheric structure and dynamics: From old wisdom to new insights. Sunspot,, 31.08.2009-4.09.2009]
    Institutional research plan: CEZ:AV0Z10030501
    Keywords : polarization * radiative transfer * scattering
    Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics

    A particularly interesting line for exploring the physical conditions of the quiet solar chromosphere is Halpha , but its intensity profile is magnetically insensitive and the small circular polarization signatures produced by the longitudinal Zeeman effect come mainly from the underlying photosphere. Here we show that the Hanle effect in Halpha provides quantitative information on the magnetism of the quiet chromosphere. To this end, we calculate the response function of the emergent scattering polarization to perturbations in the magnetic field.
    Permanent Link: http://hdl.handle.net/11104/0193959