Zobrazeno 1 - 10
of 294
pro vyhledávání: '"Soler, Roberto"'
Publikováno v:
A&A 676, A25 (2023)
The fine structure of solar prominences is made by thin threads that outline the magnetic field lines. Observations show that transverse waves of Alfv\'enic nature are ubiquitous in prominence threads. These waves are driven at the photosphere and pr
Externí odkaz:
http://arxiv.org/abs/2306.13434
Autor:
Díaz-Suárez, Sergio, Soler, Roberto
Publikováno v:
A&A 665, A113 (2022)
It has been shown in a previous work that torsional Alfv\'en waves can drive turbulence in nonuniform coronal loops with a purely axial magnetic field. Here we explore the role of the magnetic twist. We model a coronal loop as a transversely nonunifo
Externí odkaz:
http://arxiv.org/abs/2207.06315
Publikováno v:
A&A 661, A100 (2022)
The study of MHD waves is important both for understanding heating in the solar atmosphere and for solar atmospheric seismology. The analytical investigation of wave mode properties in a cylinder is of particular interest in this domain, as many atmo
Externí odkaz:
http://arxiv.org/abs/2203.02359
Autor:
Bonassi Machado, Rogério, Soler, Roberto, Freire, Marcos, Wender, Maria Celeste Osorio, Pompei, Luciano Melo
Publikováno v:
In Maturitas November 2024 189
Publikováno v:
A&A 658, A106 (2022)
Prominence threads are very long and thin flux tubes which are partially filled with cold plasma. Observations have shown that transverse oscillations are frequent in these solar structures. The observations are usually interpreted as the fundamental
Externí odkaz:
http://arxiv.org/abs/2111.09036
Publikováno v:
A&A 650, A45 (2021)
There is observational evidence of the presence of small-amplitude transverse magnetohydrodynamic (MHD) waves with a wide range of frequencies in the threads of solar prominences. It is believed that the waves are driven at the photosphere and propag
Externí odkaz:
http://arxiv.org/abs/2103.16599
Magnetohydrodynamic (MHD) kink waves have been observed frequently in solar coronal flux tubes, which makes them a great tool for seismology of the solar corona. Here, the effect of viscosity is studied on the evolution of kink waves. To this aim, we
Externí odkaz:
http://arxiv.org/abs/2005.04389
Akademický článek
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Autor:
Soler, Roberto
Publikováno v:
A&A 623, A32 (2019)
Observations show that transverse magnetohydrodynamic (MHD) waves and flows are often simultaneously present in magnetic loops of the solar corona. The waves are resonantly damped in the Alfv\'en continuum because of plasma and/or magnetic field nonu
Externí odkaz:
http://arxiv.org/abs/1901.10785
In the solar atmosphere, Alfv\'en waves are believed to play an important role in the transfer of energy from the photosphere to the corona and solar wind, and in the heating of the chromosphere. We perform numerical computations to investigate energ
Externí odkaz:
http://arxiv.org/abs/1812.01323