Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Merten, Lukas"'
Autor:
Merten, Lukas, Aerdker, Sophie
We present a new code that significantly extends CRPropa's capabilities to model the ensemble averaged transport of charged cosmic rays in arbitrary turbulent magnetic fields. The software is based on solving a set of stochastic differential equation
Externí odkaz:
http://arxiv.org/abs/2410.01472
In the Heliosphere, power-law particle distributions are observed e.g. upstream of interplanetary shocks, which can result from superdiffusive transport. This non-Gaussian transport regime may result from intermittent magnetic field structures. Recen
Externí odkaz:
http://arxiv.org/abs/2408.03638
Autor:
Lundquist, Jon Paul, Vorobiov, Serguei, Merten, Lukas, Reimer, Anita, Boughelilba, Margot, Da Vela, Paolo, Tavecchio, Fabrizio, Bonnoli, Giacomo, Righi, Chiara
This study comprehensively investigates the gamma-ray dim population of Fanaroff-Riley Type 0 (FR0) radio galaxies as potentially significant sources of ultra-high-energy cosmic rays (UHECRs, E $>$ 10$^{18}$ eV) detected on Earth. While individual FR
Externí odkaz:
http://arxiv.org/abs/2407.06961
In several jetted AGNs, structured jets have been observed. In particular spine-sheath configurations where the jet is radially divided into two or more zones of different flow velocities. We present a model based on the particle and radiation transp
Externí odkaz:
http://arxiv.org/abs/2308.10596
Autor:
Aerdker, Sophie, Batista, Rafael Alves, Tjus, Julia Becker, Dörner, Julien, Dundovic, Andrej, Eichmann, Björn, Frie, Antonius, Heiter, Christopher, Hoerbe, Mario, Kampert, Karl-Heinz, Merten, Lukas, Müller, Gero, Reichherzer, Patrick, Rossoni, Simone, Saveliev, Andrey, Schlegel, Leander, Sigl, Günter, van Vliet, Arjen, Winchen, Tobias
CRPropa is a Monte Carlo framework for simulating the propagation of (ultra-) high-energy particles in the Universe, including cosmic rays, gamma rays, electrons, and neutrinos. It covers energies from ZeV down to GeV for gamma rays and electrons, an
Externí odkaz:
http://arxiv.org/abs/2308.09532
Autor:
Merten, Lukas, Da Vela, Paolo, Reimer, Anita, Boughelilba, Margot, Lundquist, Jon Paul, Vorobiov, Serguei, Tjus, Julia Becker
We present a new energy transport code that models the time dependent and non-linear evolution of spectra of cosmic-ray nuclei, their secondaries, and photon target fields. The software can inject an arbitrary chemical composition including heavy ele
Externí odkaz:
http://arxiv.org/abs/2308.09518
Autor:
Aerdker, Sophie, Merten, Lukas, Tjus, Julia Becker, Walter, Dominik, Effenberger, Frederic, Fichtner, Horst
Motivated by cosmic ray (CR) re-acceleration at a potential Galactic Wind Termination Shock (GWTS), we present a numerical model for time-dependent Diffusive Shock Acceleration (DSA). We use the stochastic differential equation solver (DiffusionSDE)
Externí odkaz:
http://arxiv.org/abs/2306.10802
The low-luminosity Active Galactic Nuclei M87, archetype of Fanaroff-Riley I radio-galaxies, was observed in a historically quiet state in 2017. While one-zone leptonic jet models alone cannot explain the core radio-to-gamma-ray spectrum, we explore
Externí odkaz:
http://arxiv.org/abs/2208.14756
Autor:
Batista, Rafael Alves, Tjus, Julia Becker, Dörner, Julien, Dundovic, Andrej, Eichmann, Björn, Frie, Antonius, Heiter, Christopher, Hoerbe, Mario R., Kampert, Karl-Heinz, Merten, Lukas, Müller, Gero, Reichherzer, Patrick, Saveliev, Andrey, Schlegel, Leander, Sigl, Günter, van Vliet, Arjen, Winchen, Tobias
Publikováno v:
JCAP 09 (2022) 035
The landscape of high- and ultra-high-energy astrophysics has changed in the last decade, largely due to the inflow of data collected by large-scale cosmic-ray, gamma-ray, and neutrino observatories. At the dawn of the multimessenger era, the interpr
Externí odkaz:
http://arxiv.org/abs/2208.00107
Autor:
Merten, Lukas, Boughelilba, Margot, Reimer, Anita, Da Vela, Paolo, Vorobiov, Serguei, Tavecchio, Fabrizio, Bonnoli, Giacomo, Lundquist, Jon Paul, Righi, Chiara
Fanaroff-Riley (FR) 0 radio galaxies form a low-luminosity extension to the well-established ultra-high-energy cosmic-ray (UHECR) candidate accelerators FR-1 and FR-2 galaxies. Their much higher number density -- up to a factor five times more numero
Externí odkaz:
http://arxiv.org/abs/2107.13278