We present new images of the Supernova Remnant ( SNR ) G127.1+0.5 ( R5 ) , based on the 408 MHz and 1420 MHz continuum emission and the HI-line emission data of the Canadian Galactic Plane Survey ( CGPS ) .
The radio spectrum of the central compact source ( 0125+628 ) is analyzed in the range 178 MHz - 8.7 GHz , indicating a flat spectrum with synchrotron self-absorption below 800 MHz .
The SNR ’ s flux density at 408 MHz is 17.1 \pm 1.7 Jy and at 1420 MHz is 10.0 \pm 0.8 Jy , corrected for flux densities from compact sources within the SNR .
The SNR ’ s integrated flux density based spectral index ( S _ { \nu } \propto \nu ^ { - \alpha } ) is 0.43 \pm 0.10 .
The respective T-T plot spectral index ( derived from the relative size of brightness temperature variations between two frequencies , see text for details ) is 0.46 \pm 0.01 .
There is no evidence at 1 \sigma for spatial variations in spectral index within G127.1+0.5 .
In particular , we compared the northern shell , southern shell and central diffuse region .
HI observations show structures associated with the SNR in the radial velocity range of -12 to -16 km / s , suggesting G127.1+0.5 ’ s distance is 1.15 kpc .
The estimated Sedov age is 2 - 3 \times 10 ^ { 4 } yr .