The Radio Structure of the Supernova Remnant MSH14-63

Abstract

G315.4-2.3 is an extended shell supernova remnant (SNR) with some characteristics of evolutionarily young remnants and some of older ones. To further elucidate some of its characteristics, we present imaging and polarimetry of this SNR at a frequency of 1.34 GHz with a resolution of 8 arcsec made with the Australia Telescope Compact Array. The indicators of youth are: Morphologically, the radio emission arises in a smooth shell without the fine scale filaments seen in the optical. Many of the optical filaments are Balmer dominated. Where measurable, the orientation of the magnetic field appears to be radial with respect to the center of the remnant. There may have been a supernova in that region in AD185. Indications of older age include: Particularly in RCW86, the bright optical nebula in the southwestern corner of this extended SNR, but also in other locations there are several filaments with bright [S II] emission representative of older shocked filaments in radiative equilibrium. If the remnant lies at the kinematical distance of 2.8 kpc, it has a diameter of 37 pc which would be large for a remnant less than two thousand years old. The remnant seems to be expanding inside a cavity outlined by infrared emission and so it could well be young and large. Where it is encountering the walls of the cavity it is slowing rapidly and we observe the radiative filaments. RCW86 itself is encountering a dense clump of material but may also be the remains of a more compact lump of ejecta ploughing into the surroundings.

15 pages in AAS LaTeX 5.0, 5 figures (2 parts in JPEG, 6 in GIF, 4 in eps), accepted by ApJ

References in corpus (1)

• The Distance to the Cygnus Loop from Hubble Space Telescope Imaging of the Primary Shock Front

Cited by in corpus (24)

• Magnetic Field Amplification in Tycho and other Shell-type Supernova Remnants
• Interpretation of AMS-02 electrons and positrons data
• The X-ray synchrotron emission of RCW 86 and the implications for its age
• X-Ray Synchrotron Emitting Fe-Rich Ejecta in SNR RCW 86
• An X-ray Search for Compact Central Sources in Supernova Remnants I: SNRs G093.3+6.9, G315.4-2.3, G084.2+0.8, & G127.1+0.5
• The many sides of RCW 86: a type Ia supernova remnant evolving in its progenitor's wind bubble
• Suzaku View of the Supernova Remnant RCW 86: X-Ray Studies of Newly-Discovered Fe-Rich Ejecta
• Fermi Large Area Telescope Detection of Supernova Remnant RCW 86
• Constraints on cosmic-ray efficiency in the supernova remnant RCW 86 using multi-wavelength observations
• The Relation Between the Surface Brightness and the Diameter for Galactic Supernova Remnants
• Deep morphological and spectral study of the SNR RCW 86 with Fermi-LAT
• Detailed spectral and morphological analysis of the shell type SNR RCW 86
• A solar-type star polluted by calcium-rich supernova ejecta inside the supernova remnant RCW 86
• Rayleigh-Taylor Instabilities in Type Ia Supernova Remnants undergoing Cosmic-Ray Particle Acceleration - Low Adiabatic Index Solutions
• The interstellar medium in young supernova remnants: key to the production of cosmic X-rays and $\gamma$-rays
• A Chandra View Of Nonthermal Emission In The Northwestern Region Of Supernova Remnant RCW 86: Particle Acceleration And Magnetic Fields
• Cosmic Ray acceleration and Balmer emission from RCW 86 (G315.4-2.3)
• Point X-ray sources in the SNR G 315.4-2.30 (MSH 14-63, RCW 86)
• Practical aspects of X-ray imaging polarimetry of supernova remnants and other extended sources
• Particle acceleration controlled by ambient density in the southwestern rim of RCW 86
• Optical and X-ray observations of candidate isolated neutron stars in the G315.4-2.3 SNR
• Theoretical $\Sigma$-$D$ Relations for Shell-Type Galactic Supernova Remnants
• A new wideband radio polarization observation of the Supernova Remnant G315.4$-$2.3
• Magnetic-field Order in the Southwestern Rim of RCW 86 Constrained Using X-Ray Polarimetry