Levy model for interstellar scintillations

Abstract

Observations of radio signals from distant pulsars provide a valuable tool for investigation of interstellar turbulence. The time-shapes of the signals are the result of pulse broadening by the fluctuating electron density in the interstellar medium. While the scaling of the shapes with the signal frequency is well understood, the observed anomalous scaling with respect to the pulsar distance has remained a puzzle for more than 30 years. We propose a new model for interstellar electron density fluctuations, which explains the observed scaling relations. We suggest that these fluctuations obey Levy statistics rather than Gaussian statistics, as assumed in previous treatments of interstellar scintillations.

4 pages, 3 figures

References in corpus (5)

• Compressible MHD Turbulence in Interstellar Plasmas
• Faint Scattering Around Pulsars: Probing the Interstellar Medium on Solar System Size Scales
• A CLEAN-based Method for Deconvolving Interstellar Pulse Broadening from Radio Pulses
• Radio Scintillation due to Discontinuities in the Interstellar Plasma Density
• Scintillations and Levy flights through the interstellar medium

Cited by in corpus (25)

• Voltage drop across Josephson junctions for Lévy noise detection
• Levy stable noise induced transitions: stochastic resonance, resonant activation and dynamic hysteresis
• Lévy noise effects on Josephson junctions
• Hamiltonian formalism of fractional systems
• The Electromagnetic Christodoulou Memory Effect and its Application to Neutron Star Binary Mergers
• Stationary states in single-well potentials under symmetric Levy noises
• Weak localization of light in superdiffusive random systems
• PSR B0329+54: Statistics of Substructure Discovered within the Scattering Disk on RadioAstron Baselines of up to 235,000 km
• Noodle Model for Scintillation Arcs
• Interstellar Scintillation of PSR J0437-4715
• Radio-wave propagation in the non-Gaussian interstellar medium
• Radiation trapping and Lévy flights in atomic vapours: an introductory review
• Coherence and Intermittency of Electron Density in Small-Scale Interstellar Turbulence
• Damping of Electron Density Structures and Implications for Interstellar Scintillation
• Noise and Signal for Spectra of Intermittent Noiselike Emission
• Non-Gaussian Radio-Wave Scattering in the Interstellar Medium
• Escape from bounded domains driven by multi-variate $\alpha$-stable noises
• Stationary states in 2D systems driven by bi-variate Lévy noises
• Scintillation Arc Brightness and Electron Density for an Analytical Noodle Model
• Taming Lévy flights in confined crowded geometries
• On the role of stochastic Fermi acceleration in setting the dissipation scale of turbulence in the interstellar medium
• Resonant activation in 2D and 3D systems driven by multi-variate Lévy noises
• Noise-Assisted Metastability: From Lévy Flights to Memristors, Quantum Escape, and Josephson-based Axion Searches
• Probing the Large-Scale Homogeneity of the Universe with Galaxy Redshift Surveys
• Levy statistical fluctuations from a Random Amplifying Medium