10 citations · 13 across the 4 of their papers we have counts for
4 papers
Particle Acceleration in Stratified 2D MRI Turbulence: From Reconnection to First- and Second-Order Fermi and Shear Acceleration
Astor Sandoval, Mario Riquelme, Jorge Cuadra
Low-luminosity accretion disks around black holes are weakly collisional, potentially enabling nonthermal particle acceleration. Local two-dimensional particle-in-cell simulations…
HESS J1745290 spectrum explained by a transition in the diffusion regime of PeV cosmic rays in the Sgr A* accretion flow
Claudio Muena, Mario Riquelme, Andreas Reisenegger +1
Context. The diffuse TeV gamma-ray emission detected in the inner 100 pc of the Galactic Center suggests the existence of a central cosmic-ray accelerator reaching Pe…
Particle-in-cell Simulations of the Magnetorotational Instability in Stratified Shearing Boxes
Astor Sandoval, Mario Riquelme, Anatoly Spitkovsky +1
The magnetorotational instability (MRI) plays a crucial role in regulating the accretion efficiency in astrophysical accretion disks. In low-luminosity disks around black holes, su…
Stochastic Ion Acceleration by the Ion-cyclotron Instability in a Growing Magnetic Field
Francisco Ley, Mario Riquelme, Lorenzo Sironi +2
Using 1D and 2D particle-in-cell (PIC) simulations of a plasma with a growing magnetic field , we show that ions can be stochastically accelerated by the ion-cyclotron (IC…