On the Sensitivity of the H$α$ Scattering Polarization to Chromospheric Magnetism

Details On the Sensitivity of the H$α$ Scattering Polarization to Chromospheric Magnetism On the Sensitivity of the H$α$ Scattering Polarization to Chromospheric Magnetism

2010-01-15

arxiv.org/abs/1001.2720v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 4 figures, to appear in the proceedings of the 25th NSO Workshop "Chromospheric Structure and Dynamics. From Old Wisd

Scientific paper

A particularly interesting line for exploring the physical conditions of the quiet solar chromosphere is H$\alpha$, 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 H$\alpha$ 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.

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