Radio observations and spectral index study of the SNR G 126 . 2 + 1 . 6

We present new images of the low radio surface brightness Supernova Remnant (SNR) G126.2+1.6, based on the 408 MHz and 1420 MHz continuum emission and the HI-line emission data of the Canadian Galactic Plane Survey (CGPS). We find the SNR’s flux densities at 408 MHz (9.7 ± 3.9 Jy) and 1420 MHz (6.7 ± 2.1 Jy) which have been corrected for flux densities from compact sources within the SNR. We list properties of the 19 brightest compact sources within G126.2+1.6 at both 408 MHz and 1420 MHz. The integrated flux density based spectral index (S ν ∝ ν−α) is 0.30 ± 0.41. The respective T-T plot spectral index is 0.30 ± 0.08. We also find spatial variations of spectral index within the SNR: 0.2–0.6. HI observations show structures probably associated with the SNR, i.e., features associated with the SNR’s southeastern filaments in the radial velocity range of –33 to –42 km s−1, and with its northwestern filaments in –47 to –52 km s−1. This association suggests a distance of 5.6 kpc for SNR G126.2+1.6. The estimated Sedov age for G126.2+1.6 is less than 2.1 × 10 yr.