Astronomy & Astrophysics

Table 2: General parameters of the PNe. The m_V is not corrected for extinction. See text (Sect. 3) for details on the adopted diameters.
Table 3: Radius, Zanstra temperature and luminosity of the observed PNe. F(H $\beta$ ) and F(4684 Å) are in units of 10^-12 erg cm^-2 s^-1 (not corrected for extinction). The central star radius is in meters.
Table 4: Presence of PAH and silicate features in the spectra.
Table 5: Atomic line fluxes in units of 10^-12 erg cm^-2 s^-1. The background contribution (if present) in the LWS has been subtracted.
Table 6: Far infrared flux, incident FUV flux $G_{\rm0}$ (normalized to the average interstellar field) and density $n_{\rm H}$ (in cm^-3) of the nebulae. See text for details.
Table 7: Molecular intensities corrected for extinction in units of 10^-4 erg cm^-2 s^-1 sr^-1.
Table 8: Atomic, ionized and molecular (hydrogen and CO) masses. In the last column the nebular diameter (see Sect. 10 for details) in arcsec is given.