Measuring the cosmic ray acceleration efficiency of a supernova remnant

Abstract

Cosmic rays are the most energetic particles arriving at earth. Although most of them are thought to be accelerated by supernova remnants, the details of the acceleration process and its efficiency are not well determined. Here we show that the pressure induced by cosmic rays exceeds the thermal pressure behind the northeast shock of the supernova remnant RCW 86, where the X-ray emission is dominated by synchrotron radiation from ultra-relativistic electrons. We determined the cosmic-ray content from the thermal Doppler broadening measured with optical spectroscopy, combined with a proper-motion study in X- rays. The measured post-shock proton temperature in combination with the shock velocity does not agree with standard shock heating, implying that >50% of the post-shock pressure is produced by cosmic rays.

arXiv commentPublished in Science express, 10 pages, 5 figures and 2 tables

References in corpus (28)

• High-energy particle acceleration in the shell of a supernova remnant
• Cosmic Ray Acceleration at the Forward Shock in Tycho's Supernova Remnant: Evidence from Chandra X-ray Observations
• A Spatial and Spectral Study of Nonthermal Filaments in Historical Supernova Remnants: Observational Results with Chandra
• A Physical Relationship Between Electron-Proton Temperature Equilibration and Mach Number in Fast Collisionless Shocks
• Balmer-Dominated Spectra of Nonradiative Shocks in the Cygnus Loop, RCW 86 and Tycho Supernova Remnants
• The SN 1006 Remnant: Optical Proper Motions, Deep Imaging, Distance, and Brightness at Maximum
• The Evolution of Supernovae in Circumstellar Wind-Blown Bubbles I. Introduction and One-Dimensional Calculations
• Thermal X-ray Emission and Cosmic Ray Production in Young Supernova Remnants
• Electron Heating and Cosmic Rays at a Supernova Shock from Chandra X-ray Observations of E0102.2-7219
• The X-ray synchrotron emission of RCW 86 and the implications for its age
• Characterizing the non-thermal emission of Cas A
• Morphological evidence for azimuthal variations of the cosmic ray ion acceleration at the blast wave of SN 1006
• Discovery of gamma-ray emission from the shell-type supernova remnant RCW 86 with H.E.S.S
• Spatial Structure and Collisionless Electron Heating in Balmer-dominated Shocks
• High Resolution Spectroscopy of Balmer-Dominated Shocks in the RCW 86, Kepler and SN 1006 Supernova Remnants
• X-Ray Synchrotron Emitting Fe-Rich Ejecta in SNR RCW 86
• The Slow X-Ray Expansion of the Northwestern Rim of the Supernova Remnant RX J0852.0-4622
• Cosmological shock waves
• Balmer-Dominated Shocks Revisited
• SUBARU HDS Observations of a Balmer-Dominated Shock in Tycho's Supernova Remnant
• Spectral universality of strong shocks accelerating charged particles
• The Role of Diffusive Shock Acceleration on Non-Equilibrium Ionization in Supernova Remnants
• RJK Observations of the Optical Afterglow of GRB 991216
• On the plasma temperature in supernova remnants with cosmic-ray modified shocks
• A cosmic-ray precursor model for a Balmer-dominated shock in Tycho's supernova remnant
• Non-Maxwellian Proton Velocity Distributions in Nonradiative Shocks
• Limits on diffusive shock acceleration in dense and incompletely ionised media
• On the origin of TeV radiation of SN 1006

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