Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Gioele Janett"'
Autor:
Gioele Janett, Ernest Alsina Ballester, Luca Belluzzi, Tanausú del Pino Alemán, Javier Trujillo Bueno
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 1, p 38 (2023)
The long-standing paradox of the linear polarization signal of the Na i D _1 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 th
Externí odkaz:
https://doaj.org/article/4b81331be8134c148785446390f6b75c
Context. Several numerical problems require the interpolation of discrete data that present at the same time (i) complex smooth structures and (ii) various types of discontinuities. The radiative transfer in solar and stellar atmospheres is a typical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94f22d20fa6e36900d7ba0cec147227f
http://arxiv.org/abs/2110.11885
http://arxiv.org/abs/2110.11885
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 discrete problems that can be reframed as linear systems. In order to solve su
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d2a39568d8004bf0be59e87eb63c7a9
http://arxiv.org/abs/2110.11861
http://arxiv.org/abs/2110.11861
Publikováno v:
Astronomy & Astrophysics. 664:A197
Context. The polarization signals produced by the scattering of anistropic radiation in strong resonance lines encode important information about the elusive magnetic fields in the outer layers of the solar atmosphere. An accurate modeling of these s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0f6c1af17b157b4e685862885f13188
https://doi.org/10.1051/0004-6361/202243059
https://doi.org/10.1051/0004-6361/202243059
Publikováno v:
Astronomy & Astrophysics. 655:A88
Context. Numerical solutions to transfer problems of polarized radiation in solar and stellar atmospheres commonly rely on stationary iterative methods, which often perform poorly when applied to large problems. In recent times, stationary iterative
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e47c87606efcaf68e39134d059765744
https://doi.org/10.1051/0004-6361/202141238
https://doi.org/10.1051/0004-6361/202141238
Autor:
Gioele Janett, Alberto Paganini
Efficient numerical approximation of the polarized radiative transfer equation is challenging because this system of ordinary differential equations exhibits stiff behavior, which potentially results in numerical instability. This negatively impacts
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cb58dbba309662ee8114f7d530ada67c
http://arxiv.org/abs/1803.10945
http://arxiv.org/abs/1803.10945
The numerical computation of reliable and accurate Stokes profiles is of great relevance in solar physics. In the synthesis process, many actors play a relevant role: among them the formal solver, the discrete atmospheric model, and the spectral line
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a840f16457bee23714016c6745351f2
The discussion regarding the numerical integration of the polarized radiative transfer equation is still open and the comparison between the different numerical schemes proposed by different authors in the past is not fully clear. Aiming at facilitat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1a9859631d7fb9debf718a0897cef84
http://arxiv.org/abs/1709.01274
http://arxiv.org/abs/1709.01274
Autor:
Gioele Janett
Publikováno v:
Astronomy & Astrophysics. 622:A162
Observations and magnetohydrodynamic simulations of solar and stellar atmospheres reveal an intermittent behavior or steep gradients in physical parameters, such as magnetic field, temperature, and bulk velocities. The numerical solution of the stati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9419c345d55e1b2c7d84cd56ff27bf4a
https://doi.org/10.1051/0004-6361/201833984
https://doi.org/10.1051/0004-6361/201833984
Publikováno v:
The Astrophysical Journal. 845:104
When integrating the radiative transfer equation for polarized light, the necessity of high-order numerical methods is well known. In fact, well-performing high-order formal solvers enable higher accuracy and the use of coarser spatial grids. Aiming
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::540b04f91d06dd72509cc09c95de62ef
https://doi.org/10.3847/1538-4357/aa7aa3
https://doi.org/10.3847/1538-4357/aa7aa3