492 citations
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- Instituto de Astrofísica de CanariasES144 papers
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20 papers · 2 filters
Inference of electric currents in the solar photosphere
A. Pastor Yabar, J. M. Borrero, C. Quintero Noda +1
We aim at demonstrating the capabilities of a newly developed method for determining electric currents in the solar photosphere. We employ three-dimensional radiative magneto-hydro…
Highly sensitive search for magnetic fields in white dwarfs using broad-band circular polarimetry
Andrei V. Berdyugin, Vilppu Piirola, Stefano Bagnulo +2
Circular polarisation measurements of white dwarfs of various ages and spectral types are useful to understand the origin and evolution of the magnetic field in degenerate stars. I…
The polarization angle in the wings of Ca i 4227: A new observable for diagnosing unresolved photospheric magnetic fields
Emilia Capozzi, Ernest Alsina Ballester, Luca Belluzzi +1
When observed in quiet regions close to the solar limb, many strong resonance lines show conspicuous linear polarization signals, produced by scattering processes, with extended wi…
Modeling the scattering polarization of the solar Ca i 4227 Å line with angle-dependent partial frequency redistribution
Gioele Janett, Ernest Alsina Ballester, Nuno Guerreiro +4
Context. The correct modeling of the scattering polarization signals observed in several strong resonance lines requires taking partial frequency redistribution (PRD) phenomena int…
Numerical solutions to linear transfer problems of polarized radiation I. Algebraic formulation and stationary iterative methods
Gioele Janett, Pietro Benedusi, Luca Belluzzi +1
Context. The numerical modeling of the generation and transfer of polarized radiation is a key task in solar and stellar physics research and has led to a relevant class of discret…
Solving the paradox of the solar sodium D1 line polarization
Ernest Alsina Ballester, Luca Belluzzi, Javier Trujillo Bueno
Twenty-five years ago, enigmatic linear polarization signals were discovered in the core of the sodium D1 line. The only explanation that could be found implied that the solar chro…