The spectroscopic differences between disk and thick-disk/bulge novae

We examine a sample of novae with distances that have been mostly determined by nebular parallaxes and determine their spectral classes according to the classification of Williams. We show that novae that have been classified as He/N tend to concentrate close to the Galactic plane and are fast and bright, while Fe rr novae are slow and faint and are distributed more homogeneously up to heights of similar to 1000 pc above the Galactic plane. We identify a quantitative characterization of the prototypical "fast" and "slow" novae.