A CHANDRA view of non-thermal emission in the northwestern region of supernova remnant RCW 86: Particle acceleration and magnetic fields

Daniel Castro, Laura A. Lopez, Patrick O. Slane, Hiroya Yamaguchi, Enrico Ramirez-Ruiz, Enectali Figueroa-Feliciano

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The shocks of supernova remnants are believed to accelerate particles to cosmic ray (CR) energies. The amplification of the magnetic field due to CRs propagating in the shock region is expected to have an impact on both the emission from the accelerated particle population as well as the acceleration process itself. Using a 95 ks observation with the Advanced CCD Imaging Spectrometer on board the Chandra X-Ray Observatory, we map and characterize the synchrotron emitting material in the northwest region of RCW 86. We model spectra from several different regions, both filamentary and diffuse, where emission appears to be dominated by synchrotron radiation. The fine spatial resolution of Chandra allows us to obtain accurate emission profiles across three different non-thermal rims in this region. The narrow width (l ≈ 10″-30″) of these filaments constrains the minimum magnetic field strength at the post-shock region to approximately 80 μG.

Original languageEnglish (US)
Article number49
JournalAstrophysical Journal
Volume779
Issue number1
DOIs
StatePublished - Dec 10 2013

Keywords

  • ISM: individual objects (RCW 86)
  • ISM: supernova remnants
  • X-rays: ISM
  • acceleration of particles
  • cosmic rays
  • magnetic fields

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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