The First X-Ray Proper-Motion Measurements of the Forward Shock in the Northeastern Limb of SN 1006

Abstract

We report on the first X-ray proper-motion measurements of the nonthermally-dominated forward shock in the northeastern limb of SN 1006, based on two Chandra observations taken in 2000 and 2008. We find that the proper motion of the forward shock is about 0.48 arcsec/yr and does not vary around the rim within the ~10% measurement uncertainties. The proper motion measured is consistent with that determined by the previous radio observations. The mean expansion index of the forward shock is calculated to be ~0.54 which matches the value expected based on an evolutionary model of a Type Ia supernova with either a power-law or an exponential ejecta density profile. Assuming pressure equilibrium around the periphery from the thermally-dominated northwestern rim to the nonthermally-dominated northeastern rim, we estimate the ambient density to the northeast of SN 1006 to be about 0.085/cm^3.

Accepted for publication in The Astrophysical Journal Letters

References in corpus (4)

• The Kinematics of Kepler's Supernova Remnant as revealed by Chandra
• The gas density around SN 1006
• Forward Shock Proper Motions of Kepler's Supernova Remnant
• Dependence of the gamma-ray emission from SN 1006 on the astronomical parameters

Cited by in corpus (13)

• First detection of VHE gamma-rays from SN 1006 by H.E.S.S
• On the Expansion Rate, Age, and Distance of the Supernova Remnant G266.2-1.2 (Vela Jr.)
• Magnetic-Field Amplification in the Thin X-ray Rims of SN1006
• TeV cosmic ray nuclei acceleration in shell-type supernova remnants with hard $\gamma$-ray spectra
• The properties of non-thermal X-ray filaments in young supernova remnants
• Electron Heating, Magnetic Field Amplification, and Cosmic Ray Precursor Length at Supernova Remnant Shocks
• An Expanding Shell of Neutral Hydrogen Associated with SN 1006: Hints for the Single-Degenerate Origin and Faint Hadronic Gamma-Rays
• Modeling the shock-cloud interaction in SN 1006: unveiling the origin of nonthermal X-ray and gamma-ray emission
• Parametric studies of cosmic ray acceleration in supernova remnants
• First spatio-spectral Bayesian imaging of SN1006 in X-ray
• Hadronic particle acceleration in the supernova remnant SN 1006 as traced by Fermi-LAT observations
• X-ray polarization in SN 1006 southwest shows spatial variations and differences with the radio band
• Measurement of the Forward Shock Velocities of the Supernova Remnant N132D Based on the Thermal X-ray Emission