Spectral Index Asymmetries in Double Radio Sources from the VLA Sky Survey

Abstract A sample of double radio sources was selected from the Very Large Array Sky Survey to investigate correlations of spectral asymmetries with lobe length ratios and jet-sidedness. The lobe length ratio informs us about the correlation between the lobe pressure and spectral index of FRII lobes from Active Galactic Nuclei. A second analysis was done on the subset with identifiable jets. The correlation of lobe length ratio with spectral index difference was weakly positive, although statistically insignificant. Similarly, there were no statistically significant trends of spectral index difference with jet-sidedness. Further testing with a larger data set may produce a more significant result.