Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Belluzzi, Luca"'
Autor:
Belluzzi, Luca, Riva, Simone, Janett, Gioele, Guerreiro, Nuno, Riva, Fabio, Benedusi, Pietro, Alemán, Tanausú del Pino, Ballester, Ernest Alsina, Bueno, Javier Trujillo, Štěpán, Jiří
Measurable linear scattering polarization signals have been predicted and detected at the solar disk center in the core of chromospheric lines. These forward-scattering polarization signals, which are of high interest for magnetic field diagnostics,
Externí odkaz:
http://arxiv.org/abs/2404.00104
Autor:
Riva, Simone, Guerreiro, Nuno, Janett, Gioele, Rossinelli, Diego, Benedusi, Pietro, Krause, Rolf, Belluzzi, Luca
Approximated forms of the RII and RIII redistribution matrices are frequently applied to simplify the numerical solution of the radiative transfer problem for polarized radiation, taking partial frequency redistribution (PRD) effects into account. A
Externí odkaz:
http://arxiv.org/abs/2310.02021
Autor:
Janett, Gioele, Ballester, Ernest Alsina, Belluzzi, Luca, Alemán, Tanausú del Pino, Bueno, Javier Trujillo
The long-standing paradox of the linear polarization signal of the Na i D1 line was recently resolved by accounting for the atom's hyperfine structure and the detailed spectral structure of the incident radiation field. That modeling relied on the si
Externí odkaz:
http://arxiv.org/abs/2309.12880
The intensity and the linear scattering polarization profiles of the hydrogen Ly-alpha line encode valuable information on the thermodynamic and magnetic structure of the upper layers of the solar chromosphere. The Chromospheric Lyman-Alpha Spectro-P
Externí odkaz:
http://arxiv.org/abs/2303.03431
Autor:
Ishikawa, Ryohko, Bueno, Javier Trujillo, Ballester, Ernest Alsina, Belluzzi, Luca, Alemán, Tanausú del Pino, McKenzie, David E., Auchère, Frédéric, Kobayashi, Ken, Okamoto, Takenori J., Rachmeler, Laurel A., Song, Donguk
Radiative transfer investigations of the solar Mg II h and k resonance lines around 280~nm showed that, while their circular polarization (Stokes V) signals arise from the Zeeman effect, the linear polarization profiles (Stokes Q and U) are dominated
Externí odkaz:
http://arxiv.org/abs/2302.03303
Publikováno v:
A&A 664, A76 (2022)
We present the theoretical framework and numerical methods we have implemented to solve the problem of the generation and transfer of polarized radiation in spectral lines out of local thermodynamical equilibrium, while accounting for scattering pola
Externí odkaz:
http://arxiv.org/abs/2204.12523
Publikováno v:
A&A 662, A46 (2022)
Observations of scattering polarization and the Hanle effect in various spectral lines are increasingly used to complement traditional solar magnetic field determination techniques. One of the strongest scattering polarization signals in the photosph
Externí odkaz:
http://arxiv.org/abs/2202.08659
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 wing lobes. Recent studies indicate that, contrary to what was previousl
Externí odkaz:
http://arxiv.org/abs/2111.08967
Autor:
Janett, Gioele, Ballester, Ernest Alsina, Guerreiro, Nuno, Riva, Simone, Belluzzi, Luca, Alemán, Tanausú del Pino, Bueno, Javier Trujillo
Context. The correct modeling of the scattering polarization signals observed in several strong resonance lines requires taking partial frequency redistribution (PRD) phenomena into account. Aims. This work aims at assessing the impact and the range
Externí odkaz:
http://arxiv.org/abs/2110.11990
Context. Several numerical problems require the interpolation of discrete data that present various types of discontinuities. The radiative transfer is a typical example of such a problem. This calls for high-order well-behaved techniques to interpol
Externí odkaz:
http://arxiv.org/abs/2110.11885