A Statistical Inference Method for Interpreting the CLASP Observations

On 2015 September 3, the Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP) successfully measured the linear polarization produced by scattering processes in the hydrogen Ly line of the solar disk radiation, revealing conspicuous spatial variations in the Q/I and U/I signals. Via the Hanle effect,...

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Bibliographic Details
Published in:The Astrophysical journal 2018-09, Vol.865 (1), p.48
Main Authors: Št pán, J., Bueno, J. Trujillo, Belluzzi, L., Ramos, A. Asensio, Sainz, R. Manso, Alemán, T. del Pino, Casini, R., Kano, R., Winebarger, A., Auchère, F., Ishikawa, R., Narukage, N., Kobayashi, K., Bando, T., Katsukawa, Y., Kubo, M., Ishikawa, S., Giono, G., Hara, H., Suematsu, Y., Shimizu, T., Sakao, T., Tsuneta, S., Ichimoto, K., Cirtain, J., Champey, P., Pontieu, B. De, Carlsson, M.
Format: Article
Language:English
Subjects:
Astrophysics
Chromosphere
Corona
Hydrogen
Linear polarization
Magnetic fields
methods: statistical
Physics
Polarization
Radiation
radiative transfer
Solar and Stellar Astrophysics
Statistical inference
Sun: chromosphere
Sun: transition region
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Summary:On 2015 September 3, the Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP) successfully measured the linear polarization produced by scattering processes in the hydrogen Ly line of the solar disk radiation, revealing conspicuous spatial variations in the Q/I and U/I signals. Via the Hanle effect, the line-center Q/I and U/I amplitudes encode information on the magnetic field of the chromosphere-corona transition region, but they are also sensitive to the three-dimensional structure of this corrugated interface region. With the help of a simple line-formation model, here we propose a statistical inference method for interpreting the Ly line-center polarization observed by CLASP.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aad910