Zobrazeno 1 - 10
of 72
pro vyhledávání: '"van Marle, Allard Jan"'
Publikováno v:
IOP Conference Series 2024
Cosmic rays are charged particles that are accelerated to relativistic speeds by astrophysical shocks. Numerical models have been successful in confirming the acceleration process for (quasi-)parallel shocks, which have the magnetic field aligned wit
Externí odkaz:
http://arxiv.org/abs/2407.05847
Autor:
Plotnikov, Illya, van Marle, Allard Jan, Guépin, Claire, Marcowith, Alexandre, Martin, Pierrick
Publikováno v:
A&A 688, A134 (2024)
The possibility of slow diffusion regions as the origin for extended TeV emission halos around some pulsars (such as PSR J0633+1746 and PSR B0656+14) challenges the standard scaling of the electron diffusion coefficient in the interstellar medium. Se
Externí odkaz:
http://arxiv.org/abs/2406.02945
Astrophysical shocks create cosmic rays by accelerating charged particles to relativistic speeds. However, the relative contribution of various types of shocks to the cosmic ray spectrum is still the subject of ongoing debate. Numerical studies have
Externí odkaz:
http://arxiv.org/abs/2308.12721
The current paradigm of cosmic ray (CR) origin states that the most part of galactic CRs is produced by supernova remnants. The interaction of supernova ejecta with the interstellar medium after supernova's explosions results in shocks responsible fo
Externí odkaz:
http://arxiv.org/abs/2203.00353
Autor:
Inoue, Tsuyoshi, Marcowith, Alexandre, Giacinti, Gwenael, van Marle, Allard Jan, Nishino, Shogo
Galactic cosmic rays are believed to be accelerated at supernova remnants. However, whether supernova remnants can be Pevatrons is still very unclear. In this work we argue that PeV cosmic rays can be accelerated during the early phase of a supernova
Externí odkaz:
http://arxiv.org/abs/2108.13433
Autor:
van Marle, Allard Jan
When two galaxy clusters encounter each other, the interaction results in a collisionless shock that is characterized by a low (1-4) sonic Mach number, and a high Alfv{\'e}nic Mach number. Our goal is to determine if, and to what extent, such shocks
Externí odkaz:
http://arxiv.org/abs/2006.09805
We use particle-in-magnetohydrodynamics-cells to model particle acceleration and magnetic field amplification in a high Mach, parallel shock in three dimensions and compare the result to 2-D models. This allows us to determine whether 2-D simulations
Externí odkaz:
http://arxiv.org/abs/1909.06931
The material lost through stellar winds of Asymptotic Giant Branch (AGB) stars is one of the main contributors to the chemical enrichment of galaxies. The general hypothesis of the mass loss mechanism of AGB winds is a combination of stellar pulsatio
Externí odkaz:
http://arxiv.org/abs/1809.07578
Collisionless shocks with low sonic Mach numbers, $M_{\rm s} \lesssim 4$, are expected to accelerate cosmic ray (CR) protons via diffusive shock acceleration (DSA) in the intracluster medium (ICM). However, observational evidence for CR protons in th
Externí odkaz:
http://arxiv.org/abs/1807.09403
We present simulations of magnetized astrophysical shocks taking into account the interplay between the thermal plasma of the shock and supra-thermal particles. Such interaction is depicted by combining a grid-based magneto-hydrodynamics description
Externí odkaz:
http://arxiv.org/abs/1709.08482