ZEU-THAT

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2017-11-22
16:12
DBCoverage [PUBDB-2017-12238] Report/Journal Article
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Microscopic Processes in Global Relativistic Jets Containing Helical Magnetic Fields: Dependence on Jet Radius
[ arXiv:1708.07740] ddc:520
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2017-11-21
12:52
[PUBDB-2017-12192] Conference Presentation
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Laboratory astrophysics:Bell’s instability, a cosmic-ray driven magnetic field fluctuation
9. DESY Beschleuniger Ideenmarkt, Meeting locationHamburg, Germany, 10 Oct 2017 - 10 Oct 20172017-10-102017-10-10
With the progresses of experimental technologies, laboratory astrophysics has become an alternative method in astrophysics studies besides the classical observations and numerical simulations. Via the connection between astrophysics and laboratory experiments, laboratory astrophysics seeks to expand our understanding of physical processes by simulating the extreme astrophysical environments in the laboratory. [...]
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2017-11-21
12:42
[PUBDB-2017-12188] Conference Presentation
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Preparatory simulation studies for the laboratory experiment of cosmic-ray driven magnetic field fluctuations
Computational Plasma Physics Conference 2017, Meeting locationYork, UK, 20 Nov 2017 - 22 Nov 20172017-11-202017-11-22
For the source of PeV-scale high energy cosmic ray particles, the diffusive shock acceleration process at the forward shocks of supernova remnants is considered as the principal mechanism. For efficient acceleration, a nonresonant instability driven by cosmic ray current is suggested as a candidate for providing the required magnetic turbulence in the upstream region of the shock [1]. [...]
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2017-11-08
16:33
OpenAccess [PUBDB-2017-11784] Poster
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Simulation study for the laboratory experiment of Bell’s instability
The 10th International Conference on Inertial Fusion Sciences and Applications , IFSA2017, Meeting locationSaint Malo, France, 11 Sep 2017 - 15 Sep 20172017-09-112017-09-15  GO
The diffusive shock acceleration at the forward shocks of shell-type supernova remnants is believed as a prime process to generate high energy cosmic ray particles. For efficient acceleration, Bell’s instability, driven by streaming cosmic rays, is proposed as a candidate for providing the required magnetic turbulence in the upstream region of the shock [1]. [...]
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2017-11-08
15:18
[PUBDB-2017-11782] Poster
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Bell’s instability in the laboratory: pre-experiment simulation study
XXXIII International Conference on Phenomena in Ionized Gases, ICPIG 2017, Meeting locationEstoril, DESY, Portugal, 9 Jul 2017 - 14 Jul 20172017-07-092017-07-14
The diffusive shock acceleration is considered as a process to generate high energy cosmic ray particles. For efficient acceleration, magnetic field fluctuations stronger than the background interstellar field are indispensable in the upstream region of the shock. [...]

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2017-10-20
13:38
OpenAccess [PUBDB-2017-11472] Report/Journal Article
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Particle acceleration model for the broad-band baseline spectrum of the Crab nebula
[arXiv:1702.00816] ddc:520
We develop a simple one-zone model of the steady-state Crab nebula spectrum encompassing both the radio/soft X-ray and the GeV/multi-TeV observations. By solving the transport equation for GeV–TeV electrons injected at the wind termination shock as a log-parabola momentum distribution and evolved via energy losses, we determine analytically the resulting differential energy spectrum of photons. [...]
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2017-10-19
15:19
[PUBDB-2017-11454] Journal Article
; ; ; et al
Plasma effects on relativistic pair beams from TeV blazars. PIC simulations and analytical predictions
ddc:520
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2017-09-28
15:10
OpenAccess [PUBDB-2017-11075] Journal Article
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Electron Pre-Acceleration at Nonrelativistic High-Mach-Number Perpendicular Shocks
ddc:520
We perform particle-in-cell simulations of perpendicular nonrelativistic collisionless shocks to study electron heating and pre-acceleration for parameters that permit the extrapolation to the conditions at young supernova remnants. Our high-resolution large-scale numerical experiments sample a representative portion of the shock surface and demonstrate that the efficiency of electron injection is strongly modulated with the phase of the shock reformation. [...]
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2017-09-05
16:13
OpenAccess [PUBDB-2017-10367] Preprint/Report
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Polarization of Submillimeter Lines from Interstellar Medium
[arXiv:1707.01015]
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Magnetic fields play important roles in many astrophysical processes. However, there is no universal diagnostic for the magnetic fields in the interstellar medium (ISM) and each magnetic tracer has its limitation. [...]
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2017-08-29
10:28
OpenAccess [PUBDB-2017-10020] Journal Article
; ; ; et al
TeV Cosmic-Ray Anisotropy from the Magnetic Field at the Heliospheric Boundary
ddc:520
We performed numerical calculations to test the suggestion by Desiati and Lazarian that the anisotropies of TeV cosmic rays may arise from their interactions with the heliosphere. For this purpose, we used a magnetic field model of the heliosphere and performed direct numerical calculations of particle trajectories. [...]
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