Streaming instability in neutron star magnetospheres: No indication of soliton-like waves
arXiv:2309.15613 · doi:10.1051/0004-6361/202348087
Abstract
Coherent radiation of pulsars, magnetars, and fast radio bursts could, in theory, be interpreted as radiation from solitons and soliton-like waves. The solitons are meant to contain a large number of electric charges confined on long time-scales and may radiate strongly by coherent curvature emission. However, solitons are also known to undergo a wave collapse, which may cast doubts on the correctness of the soliton radio emission models of neutron stars. We investigate the evolution of the caviton type of solitons self-consistently formed by the relativistic streaming instability and compare their apparent stability in 1D calculations with more generic 2D cases, in which the solitons are seen to collapse. Three representative cases of beam Lorentz factors and plasma temperatures are studied to obtain soliton dispersion properties. We utilized 1D electrostatic and 2D electromagnetic relativistic particle-in-cell simulations at kinetic microscales. We found that no solitons are generated by the streaming instability in the 2D simulations. Only superluminal L-mode (relativistic Langmuir) waves are produced during the saturation of the instability, but these waves have smaller amplitudes than the waves in the 1D simulations. The amplitudes tend to decrease after the instability has saturated, and only waves close to the light line, , remain. Solitons in the 1D approach are stable for , but they disappear for low beam Lorentz factor . Our examples show that the superluminal soliton branch that is formed in 1D simulations will not be generated by the relativistic streaming instability when more dimensional degrees of freedom are present - unless one can show that there are alternative plasma mechanisms for the soliton generation.
arXiv commentAstronomy & Astrophysics, 12 pages, 6 figures
References in corpus (44)
- A Living Theory Catalogue for Fast Radio Bursts
- The Physical Mechanisms of Fast Radio Bursts
- Non-thermal particle acceleration in collisionless relativistic electron-proton reconnection
- Particle Acceleration in Relativistic Jets due to Weibel Instability
- Bunching Coherent Curvature Radiation in Three-Dimensional Magnetic Field Geometry: Application to Pulsars and Fast Radio Bursts
- Spacetime approach to force-free magnetospheres
- The Physics of Fast Radio Bursts
- On the radiation mechanism of repeating fast radio bursts
- The spark-associated soliton model for pulsar radio emission
- Beaming and rapid variability of high-energy radiation from relativistic pair plasma reconnection
- Curvature radiation in pulsar magnetospheric plasma
- Exact relativistic kinetic theory of an electron beam-plasma system: hierarchy of the competing modes in the system parameter space
- FRB Coherent Emission from Decay of Alfven Waves
- High-resolution single-pulse studies of the Vela Pulsar
- Pair Creation in the Pulsar Magnetosphere
- Radio Emission Physics in the Crab Pulsar
- Unraveling the nature of coherent pulsar radio emission
- Pair separation in parallel electric field in magnetar magnetosphere and narrow spectra of fast radio bursts
- Pulsar radio emission mechanisms: a critique
- On generation of Crab giant pulses
- Observation of post-soliton expansion following laser propagation through an underdense plasma
- A mechanism for fast radio bursts
- On the adiabatic walking of plasma waves in a pulsar magnetosphere
- A global model of particle acceleration at pulsar wind termination shocks
- Mode changing, subpulse drifting and nulling in four component conal pulsar PSR J2321+6024
- Relativistic charge solitons created due to nonlinear Landau damping: A candidate for explaining coherent radio emission in pulsars
- Accelerated electron populations formed by Langmuir wave-caviton interactions
- First-year ion-acoustic wave observations in the solar wind by the RPW/TDS instrument onboard Solar Orbiter
- Formation of the Radio Profile Components of the Crab Pulsar
- Resolving the Emission Regions of the Crab Pulsar's Giant Pulses II. Evidence for Relativistic Motion
- Linear acceleration emission: 1 Motion in a large amplitude electrostatic wave
- Wave dispersion in pulsar plasma: 1. Plasma rest frame
- Linear acceleration emission: 2 Power spectrum
- Low energy Langmuir cavitons: asymptotic limit of weak turbulence
- Stabilization of Magnetic Reconnection in Relativistic Current Sheet
- Pulsar radio emission mechanism II. On the origin of relativistic Langmuir solitons in pulsar plasma
- Time-step dependent force interpolation scheme for suppressing numerical Cherenkov instability in relativistic particle-in-cell simulations
- Radio Emission by Soliton Formation in Relativistically Hot Streaming Pulsar Pair Plasmas
- Refining pulsar radio emission due to streaming instabilities: Linear theory and PIC simulations in a wide parameter range
- Nonaxisymmetric Poynting Jets
- Linear acceleration emission of pulsar relativistic streaming instability and interacting plasma bunches
- Brightness temperature constraints on coherent processes in magnetospheres of neutron stars
- Fast Radio Bursts as crustal dynamical events induced by magnetic field evolution in young magnetars
- Stimulated-emission based model of fast radio bursts