Magnetic-Field Amplification in the Thin X-ray Rims of SN1006

Abstract

Several young supernova remnants (SNRs), including SN1006, emit synchrotron X-rays in narrow filaments, hereafter thin rims, along their periphery. The widths of these rims imply 50 to 100 $\mu$G fields in the region immediately behind the shock, far larger than expected for the interstellar medium compressed by unmodified shocks, assuming electron radiative losses limit rim widths. However, magnetic-field damping could also produce thin rims. Here we review the literature on rim width calculations, summarizing the case for magnetic-field amplification. We extend these calculations to include an arbitrary power-law dependence of the diffusion coefficient on energy, $D\propto E^{\mu }$. Loss-limited rim widths should shrink with increasing photon energy, while magnetic-damping models predict widths almost independent of photon energy. We use these results to analyze Chandra observations of SN 1006, in particular the southwest limb. We parameterize the full widths at half maximum (FWHM) in terms of energy as FWHM $\propto E_{\gamma }^{m_E}$. Filament widths in SN1006 decrease with energy; $m_E\sim -0.3$ to $-0.8$, implying magnetic field amplification by factors of 10 to 50, above the factor of 4 expected in strong unmodified shocks. For SN 1006, the rapid shrinkage rules out magnetic damping models. It also favors short mean free paths (small diffusion coefficients) and strong dependence of $D$ on energy ($\mu \ge 1$).

arXiv commentAccepted by ApJ, 49 pages, 10 figures

References in corpus (23)

• Observation of the suppression of the flux of cosmic rays above 4x10^19eV
• On the magnetic fields and particle acceleration in Cas A
• Fine Structures of Shock of SN 1006 with the Chandra Observation
• Observational constraints on energetic particle diffusion in young SNRs: amplified magnetic field and maximum energy
• The SN 1006 Remnant: Optical Proper Motions, Deep Imaging, Distance, and Brightness at Maximum
• First detection of VHE gamma-rays from SN 1006 by H.E.S.S
• Confirmation of strong magnetic field amplification and nuclear cosmic ray acceleration in SN 1006
• The blast wave of Tycho's supernova remnant
• Chandra Observations of A Galactic Supernova Remnant Vela Jr.: A New Sample of Thin Filaments Emitting Synchrotron X-Rays
• Direct evidence of efficient cosmic ray acceleration and magnetic field amplification in Cassiopeia A
• A High-Resolution X-Ray and Optical Study of SN 1006: Asymmetric Expansion and Small-Scale Structure in a Type Ia Supernova Remnant
• Universal behaviour of shock precursors in the presence of efficient cosmic-ray acceleration
• Spatial structure of X-ray filaments in SN 1006
• The First X-Ray Proper-Motion Measurements of the Forward Shock in the Northeastern Limb of SN 1006
• Thermal emission, shock modification, and X-ray emitting ejecta in SN 1006
• Radio Emission from a Young Supernova Remnant Interacting with an Interstellar Cloud: MHD Simulation with Relativistic Electrons
• Synchrotron-Loss Spectral Breaks in Pulsar-Wind Nebulae and Extragalactic Jets
• Constraints On the Diffusive Shock Acceleration From the Nonthermal X-ray Thin Shells In SN1006 NE Rim
• Postshock turbulence and diffusive shock acceleration in young supernova remnants
• Steady X-Ray Synchrotron Emission in the Northeastern Limb of SN 1006
• X-ray Spectral Variations in the Youngest Galactic Supernova Remnant G1.9+0.3
• The properties of non-thermal X-ray filaments in young supernova remnants
• Probing Shock Properties with Non-thermal X-ray Filaments in Cas A

Cited by in corpus (37)

• Nonthermal particles and photons in starburst regions and superbubbles
• A Nova Outburst Powered by Shocks
• Kinetic Simulations of Cosmic-Ray-Modified Shocks II: Particle Spectra
• Kinetic Simulations of Cosmic-Ray-Modified Shocks I: Hydrodynamics
• Supernova Remnants in the Local Group I: A model for the radio luminosity function and visibility times of supernova remnants
• Locating the most energetic electrons in Cassiopeia A
• Novae as Tevatrons: Prospects for CTA and IceCube
• An X-ray and Radio Study of the Varying Expansion Velocities in Tycho's Supernova Remnant
• A Spatially Resolved Study of the Synchrotron Emission and Titanium in Tycho's Supernova Remnant with NuSTAR
• The Efficiency of Magnetic Field Amplification at Shocks by Turbulence
• On the Spectrum of Electrons Accelerated in Supernova Remnants
• Cosmic Magnetism in Centimeter and Meter Wavelength Radio Astronomy
• Non-Thermal Radio Emission from Colliding Flows in Classical Nova V1723 Aql
• Turbulent Magnetic Field Amplification by the Interaction of Shock Wave and Inhomogeneous Medium
• The Three-Dimensional Expansion of the Ejecta from Tycho's Supernova Remnant
• Inhomogeneities and the modeling of radio supernovae
• Steep Cosmic Ray Spectra with Revised Diffusive Shock Acceleration
• Evidence for multiple shocks from the $\gamma$-ray emission of RS Ophiuchi
• Energy Dependence of Synchrotron X-Ray Rims in Tycho's Supernova Remnant
• Evolution and observational signatures of the cosmic ray electron spectrum in SN 1006
• Magnetic field estimates from the X-ray synchrotron emitting rims of the 30 Dor C superbubble and the implications for the nature of 30 Dor C's TeV emission
• Analysis of GeV-band gamma-ray emission from SNR RX J1713.7-3946
• XMM-Newton Large Program on SN1006 - I: Methods and Initial Results of Spatially-Resolved Spectroscopy
• Modeling the shock-cloud interaction in SN 1006: unveiling the origin of nonthermal X-ray and gamma-ray emission
• Time-dependent galactic winds
• Diffusive shock acceleration at oblique high Mach number shocks
• Stochastic re-acceleration and magnetic-field damping in Tycho's supernova remnant
• Supernova of 1006 (G327.6+14.6)
• Radio polarization maps of shell-type SNRs II. Sedov models with evolution of turbulent magnetic field
• On the Expansion, Age, and Origin of the Puzzling Shell/Pulsar Wind Nebula G310.6-1.6
• Particle acceleration controlled by ambient density in the southwestern rim of RCW 86
• Detection of the hard X-ray non-thermal emission from Kepler's supernova remnant
• The X-ray synchrotron rims in Cassiopeia A narrow with energy
• X-ray polarization in SN 1006 southwest shows spatial variations and differences with the radio band
• PeVatron Candidate SNR G106.3+2.7 in a Low-density Cavity: a Multiwavelength Test
• Macroscopic magnetization of primordial plasma by virial shocks
• Efficiencies of Magnetic-Field Amplification and Electron Acceleration in Young Supernova Remnants: Global Averages and Kepler's Supernova Remnant