Turbulent model of Crab nebula radiation

Abstract

We construct a turbulent model of the Crab Nebula's non-thermal emission. The present model resolves a number of long-standing problems of the Kennel-Coroniti (1984) model: (i) the sigma problem; (ii) the hard spectrum of radio electrons; (iii) the high peak energy of gamma-ray flares; (iv) and the spacial evolution of the infrared (IR) emission. The Nebula contains two populations of injected particles: Component-I accelerated at the wind termination shock via Fermi-I mechanism, and Component-II accelerated in reconnecting turbulence in highly magnetized ($\sigma$ $\gg 1$) plasma in the central part of the Crab Nebula. The reconnecting turbulence Component-II extends from radio to gamma rays: it accelerate radio electrons with a hard spectrum, destroy the large scale magnetic flux (and thus resolves the sigma-problem), and occasionally produces gamma-ray flares (from the largest scale reconnection events). The model reproduces the broad-band spectrum of the Crab Nebula, from low-frequency synchrotron emission in radio to inverse-Compton emission at TeV energies, as well as spatially resolved evolution of the spectral indices in IR and optical bands.

References in corpus (18)

• Observations of the Crab Nebula with H.E.S.S
• Formation of Hard Power-laws in the Energetic Particle Spectra Resulting from Relativistic Magnetic Reconnection
• Gamma-ray flares from the Crab Nebula
• Discovery of Powerful Gamma-Ray Flares from the Crab Nebula
• VHE Gamma-Ray Observation of the Crab Nebula and its Pulsar with the MAGIC telescope
• General Theory of the Plasmoid Instability
• Pulsar Wind Nebulae as Cosmic Pevatrons: A Current Sheet's Tale
• Kinetic turbulence in relativistic plasma: from thermal bath to non-thermal continuum
• Relativistic magnetic reconnection in pair plasmas and its astrophysical applications
• Spitzer Space Telescope Infrared Imaging and Spectroscopy of the Crab Nebula
• Particle acceleration in the driven relativistic reconnection
• Scaling of magnetic reconnection in relativistic collisionless plasmas
• Plasmoid Instability in Forming Current Sheets
• On the Value of the Reconnection Rate
• Pulsar-wind nebulae and magnetar outflows: observations at radio, X-ray, and gamma-ray wavelengths
• Far-infrared and sub-mm observations of the Crab nebula
• Constraints on particle acceleration sites in the Crab Nebula from relativistic MHD simulations
• Modelling Jets, Tori and Flares in Pulsar Wind Nebulae

Cited by in corpus (10)

• Spectrum and extension of the inverse-Compton emission of the Crab Nebula from a combined Fermi-LAT and H.E.S.S. analysis
• Ultrahigh-energy Gamma-Ray Radiation from the Crab Pulsar Wind Nebula
• Modeling the broadest spectral band of the Crab nebula and constraining the ions acceleration efficiency
• Phenomenological modelling of the Crab Nebula's broad band energy spectrum and its apparent extension
• Faraday conversion in pair-symmetric winds of magnetars and Fast Radio Bursts
• On the nature of Fast Blue Optical Transients
• Scale Statistics of Current Sheets in Relativistic Collisionless Plasma Turbulence
• Collisionless tearing instability in relativistic non-thermal pair plasma and its application to MHD turbulence
• Spatially resolved polarization variation of the Crab Nebula
• On The Nonthermal Power Laws In Magnetized Turbulent Plasmas