We present a new radio-selected sample of PNe from the CORNISH survey .
This is a radio continuum survey of the inner Galactic plane covering Galactic longitude , 10 ^ { \circ } < l < 65 ^ { \circ } and latitude , |b| < 1 ^ { \circ } with a resolution of 1.5 ^ { \arcsec } and sensitivity better than 0.4 mJy/beam .
The radio regime , being unbiased by dust extinction , allows for a more complete sample selection , especially towards the Galactic mid-plane .
Visual inspection of the CORNISH data , in combination with data from multi-wavelength surveys of the Galactic plane , allowed the CORNISH team to identify 169 candidate PNe .
Here , we explore the use of multi-wavelength diagnostic plots and analysis to verify and classify the candidate PNe .
We present the multi-wavelength properties of this new PNe sample .
We find 90 new PNe , of which 12 are newly discovered and 78 are newly classified as PN .
A further 47 previously suspected PNe are confirmed as such from the analysis presented here and 24 known PNe are detected .
Eight sources are classified as possible PNe or other source types .
Our sample includes a young sub-sample , with physical diameters < 0.12 pc , brightness temperatures ( > 1000 K ) and located closer than 7 kpc .
Within this sample is a water-maser PN with a spectral index of -0.55 \pm 0.08 , which indicates non-thermal radio emission .
Such a radio-selected sample , unaffected by extinction , will be particularly useful to compare with population synthesis models and should contribute to the understanding of the formation and evolution of PNe .