The Effect of a Cosmic Ray Precursor in SN 1006?

Abstract

Like many young supernova remnants, SN 1006 exhibits what appear to be clumps of ejecta close to or protruding beyond the main blast wave. In this paper we examine 3 such protrusions along the east rim. They are semi-aligned with ejecta fingers behind the shock-front, and exhibit emission lines from O VII and O VIII. We first interpret them in the context of an upstream medium modified by the saturated nonresonant Bell instability which enhances the growth of Rayleigh-Taylor instabilities when advected postshock. We discuss their apparent periodicity if the spacing is determined by properties of the remnant or by a preferred size scale in the cosmic ray precursor. We also briefly discuss the alternative that these structures have an origin in the ejecta structure of the explosion itself. In this case the young evolutionary age of SN 1006 would imply density structure within the outermost layers of the explosion with potentially important implications for deflagration and detonation in thermonuclear supernova explosion models.

5 pages, ApJL in press

References in corpus (5)

• Evidence For Particle Acceleration to the Knee of the Cosmic Ray Spectrum in Tycho's Supernova Remnant
• The gas density around SN 1006
• The First X-Ray Proper-Motion Measurements of the Forward Shock in the Northeastern Limb of SN 1006
• Simulation of the growth of the 3D Rayleigh-Taylor instability in Supernova Remnants using an expanding reference frame
• A high resolution UV absorption spectrum of supernova ejecta in SN1006

Cited by in corpus (14)

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• Universal behaviour of shock precursors in the presence of efficient cosmic-ray acceleration
• Role of ejecta clumping and back-reaction of accelerated cosmic rays in the evolution of Type Ia supernova remnants
• A filamentation instability for streaming cosmic-rays
• 3D Simulations of the Thermal X-ray Emission from Young Supernova Remnants Including Efficient Particle Acceleration
• Spectrum and Composition of Ultra-high Energy Cosmic Rays from Semi-relativistic Hypernovae
• Electron Heating, Magnetic Field Amplification, and Cosmic Ray Precursor Length at Supernova Remnant Shocks
• Modeling the shock-cloud interaction in SN 1006: unveiling the origin of nonthermal X-ray and gamma-ray emission
• Genus Statistic Applied to the X-ray Remnant of SN 1572: Clues to the Clumpy Ejecta Structure of Type Ia Supernovae
• Magnetic and density spikes in cosmic ray shock precursors
• Wave Propagation at Oblique Shocks: How Did Tycho Get Its Stripes?
• Radio polarization maps of shell-type SNRs II. Sedov models with evolution of turbulent magnetic field
• Hadronic gamma-ray images of Sedov supernova remnants
• Modeling particle acceleration and non-thermal emission in supernova remnants