Zobrazeno 1 - 10
of 2 881
pro vyhledávání: '"A, Bacchini"'
Autor:
Scolini, Camilla, Zhuang, Bin, Lugaz, Noé, Winslow, Réka M., Farrugia, Charles J., Magyar, Norbert, Bacchini, Fabio
We investigate whether Alfv\'enic fluctuations (AFs) can affect the structure of magnetic ejecta (MEs) within interplanetary coronal mass ejections (ICMEs). We study an ICME observed on 2001 December 29 at 1 au by ACE and Wind, at a total angular sep
Externí odkaz:
http://arxiv.org/abs/2412.08008
Autor:
Ignesti, Alessandro, Brunetti, Gianfranco, Gullieuszik, Marco, Akerman, Nina, Marasco, Antonino, Poggianti, Bianca M., Li, Yuan, Vulcani, Benedetta, Gitti, Myriam, Moretti, Alessia, Giunchi, Eric, Tomičić, Neven, Bacchini, Cecilia, Paladino, Rosita, Radovich, Mario, Wolter, Anna
The microphysics of the intracluster medium (ICM) in galaxy clusters is still poorly understood. Observational evidence suggests that the effective viscosity is suppressed by plasma instabilities that reduce the mean free path of particles. Measuring
Externí odkaz:
http://arxiv.org/abs/2411.07034
Autor:
Zou, Minghao, Hakobyan, Hayk, Mbarek, Rostom, Ripperda, Bart, Bacchini, Fabio, Sironi, Lorenzo
We propose novel numerical schemes based on the Boris method in curved spacetime, incorporating both hadronic and radiative interactions for the first time. Once the proton has lost significant energy due to radiative and hadronic losses, and its gyr
Externí odkaz:
http://arxiv.org/abs/2410.22781
Autor:
Gorbunov, Evgeny A., Bacchini, Fabio, Zhdankin, Vladimir, Werner, Gregory R., Begelman, Mitchell C., Uzdensky, Dmitri A.
We present the largest 3D Particle-in-Cell shearing-box simulations of turbulence driven by the magnetorotational instability, for the first time employing the realistic proton-to-electron mass ratio. We investigate the energy partition between relat
Externí odkaz:
http://arxiv.org/abs/2410.02872
Autor:
Rizzo, F., Bacchini, C., Kohandel, M., Di Mascolo, L., Fraternali, F., Roman-Oliveira, F., Zanella, A., Popping, G., Valentino, F., Magdis, G., Whitaker, K.
Publikováno v:
A&A 689, A273 (2024)
The gas in the interstellar medium (ISM) of galaxies is supersonically turbulent. Measurements of turbulence typically rely on cold gas emission lines for low-z galaxies and warm ionized gas observations for z>0 galaxies. Studies of warm gas kinemati
Externí odkaz:
http://arxiv.org/abs/2407.06261
The local gravitational instability of rotating discs is believed to be an important mechanism in different astrophysical processes, including the formation of gas and stellar clumps in galaxies. We aim to study in three dimensions the local gravitat
Externí odkaz:
http://arxiv.org/abs/2405.13123
Turbulent states are ubiquitous in plasmas and the understanding of turbulence is fundamental in modern astrophysics. Numerical simulations, which are the state-of-the-art approach to the study of turbulence, require substantial computing resources.
Externí odkaz:
http://arxiv.org/abs/2405.09587
Autor:
Pezzini, Luca, Zhukov, Andrei N., Bacchini, Fabio, Arrò, Giuseppe, López, Rodrigo A., Micera, Alfredo, Innocenti, Maria Elena, Lapenta, Giovanni
Publikováno v:
The Astrophysical Journal, 975:37, 2024
The expanding solar wind plasma ubiquitously exhibits anisotropic non-thermal particle velocity distributions. Typically, proton Velocity Distribution Functions (VDFs) show the presence of a core and a field-aligned beam. Novel observations made by P
Externí odkaz:
http://arxiv.org/abs/2405.08196
Autor:
Bacchini, C., Nipoti, C., Iorio, G., Roman-Oliveira, F., Rizzo, F., Piña, P. E. Mancera, Marasco, A., Zanella, A., Lelli, F.
Local gravitational instability (LGI) is considered crucial for regulating star formation and gas turbulence in galaxy discs, especially at high redshift. Instability criteria usually assume infinitesimally thin discs or rely on approximations to inc
Externí odkaz:
http://arxiv.org/abs/2405.00103
We present a study of energetic-electron trapping and acceleration in the Kelvin-Helmholtz-induced magnetohydrodynamic (MHD) turbulence of post-flare loops in the solar corona. Using the particle-tracing capabilities of MPI-AMRVAC 3.0, we evolve ense
Externí odkaz:
http://arxiv.org/abs/2403.07107