| Title | A catalogue of absolute fluxes and distances of planetary nebulae. |
| Authors | Cahn, J. H.; Kaler, J. B.; Stanghellini, L. |
| Bibcode | 1992A&AS...94..399C Search ADS ↗ |
| Abstract | We present a complete list of averaged recalibrated absolute Hβ fluxes, global (where possible) relative He II λ4686 fluxes, 5 GHz radio flux densities, and Hα/Hβ and radio/Hβ interstellar extinction constants for 778 Galactic planetary nebulae. The catalogue provides much of the fundamental data required to generate Zanstra temperatures. When data with the lowest errors are selected, the optical and radio/optical extinctions show a peculiar correlation, with the radio values slightly high at low extinction and notably low at high extinction. We use the data along with our best estimates of angular diameters to calculate Shklovsky distances according to the Daub scheme on the scale used earlier by Cahn & Kaler. Use of this distance scale shows approximate equality of the death rates of optically thick and optically thin planetary nebulae. The method gives the correct distances to the Magellanic Clouds. |
