Updated cosmic-ray and radio constraints on light dark matter: Implications for the GeV gamma-ray excess at the Galactic center [PDF]
, 2014 The apparent gamma-ray excess in the Galactic center region and inner Galaxy has attracted considerable interest, notably because both its spectrum and radial distribution are consistent with an interpretation in terms of annihilating dark matter ...
Bringmann, Torsten +2 more
core +3 more sources
The mirror mode: A "superconducting'' space plasma analogue
, 2018 We examine the physics of the magnetic mirror mode in its final state of saturation, the thermodynamic equilibrium, to demonstrate that the mirror mode is the analogue of a superconducting effect in a classical anisotropic-pressure space plasma.
Baumjohann, W., Treumann, R. A.
core +2 more sources
Optimized trajectories to the nearest stars using lightweight high-velocity photon sails
, 2017 New means of interstellar travel are now being considered by various research teams, assuming lightweight spaceships to be accelerated via either laser or solar radiation to a significant fraction of the speed of light (c).
Heller, René +2 more
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The Puzzle of the Flyby Anomaly
, 2009 Close planetary flybys are frequently employed as a technique to place spacecraft on extreme solar system trajectories that would otherwise require much larger booster vehicles or may not even be feasible when relying solely on chemical propulsion.
B. Tapley +19 more
core +1 more source
Neutrino propagation in an electron background with an inhomogeneous magnetic field
, 2018 We study the electromagnetic coupling of a neutrino that propagates in a two-stream electron background medium. Specifically, we calculate the electromagnetic vertex function for a medium that consists of a \emph{normal} electron background plus another ...
Nieves, Jose F., Sahu, Sarira
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Alfven Wave Collisions, The Fundamental Building Block of Plasma Turbulence II: Numerical Solution
, 2013 This paper presents the numerical verification of an asymptotic analytical solution for the nonlinear interaction between counterpropagating Alfven waves, the fundamental building block of astrophysical plasma turbulence. The analytical solution, derived
Dorland, William +2 more
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Breaks in interstellar spectra of positrons and electrons derived from time-dependent AMS data
, 2019 Until fairly recently, it was widely accepted that local cosmic ray spectra were largely featureless power laws, containing limited information on their acceleration and transport.
Gast, Henning +3 more
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Turbulence and Transport During Guide-Field Reconnection at the Magnetopause
, 2019 We analyze the development and influence of turbulence in three-dimensional particle-in-cell simulations of guide-field magnetic reconnection at the magnetopause with parameters based on observations of an electron diffusion region by the Magnetospheric ...
Drake, J. F. +3 more
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Experimental determination of whistler wave dispersion relation in the solar wind
, 2016 The origins and properties of large-amplitude whistler wavepackets in the solar wind are still unclear. In this Letter, we utilize single spacecraft electric and magnetic field waveform measurements from the ARTEMIS mission to calculate the plasma frame ...
Chen, CHK +3 more
core +2 more sources
On deformation of electron holes in phase space
, 2008 This Letter shows that for particularly shaped background particle distributions momentum exchange between phase space holes and the distribution causes acceleration of the holes along the magnetic field.
Begelman M. J. +11 more
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