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
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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.
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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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Extracting dark matter signatures from atomic clock stability measurements
, 2017 We analyze possible effects of the dark matter environment on the atomic clock stability measurements. The dark matter is assumed to exist in a form of waves of ultralight scalar fields or in a form of topological defects (monopoles and strings).
Kalaydzhyan, Tigran, Yu, Nan
core +1 more source
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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Entropic Gravity, Phase-Space Noncommutativity and the Equivalence Principle
, 2011 We generalize E. Verlinde's entropic gravity reasoning to a phase-space noncommutativity set-up. This allow us to impose a bound on the product of the noncommutative parameters based on the Equivalence Principle.
Bastos C +15 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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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
, 2019 Kinetic simulations based on the Eulerian Hybrid Vlasov-Maxwell (HVM) formalism permit the examination of plasma turbulence with useful resolution of the proton velocity distribution function (VDF).
Chasapis, A. +6 more
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On the applicability of Taylor's hypothesis in streaming magnetohydrodynamic turbulence
, 2019 We examine the range of applicability of Taylor's hypothesis used in observations of magnetic turbulence in the solar wind. We do not refer to turbulence theory.
Baumjohann, W. +2 more
core +1 more source