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- W2952052045 abstract "We calculate filling factors (${varepsilon}$) and ionized masses (M$_{rm i}$) for a total of 84 galactic and extragalactic planetary nebulae (PNe) at known distances. To do these calculations, we have chosen forbidden line electron densities, observed angular diameters, and H${beta}$ fluxes, from the most recent measurements available in the literature. Statistical analysis on the distributions of ${varepsilon}$ and ${rm M_i}$ show that (1) the ranges of values of these parameters is wider than what was previously found; (2) the mean value of the filling factor is between $0.3$ and $0.4$, for the different sets; (3) the mean value of the ionized mass is between $0.1$ and $0.25$ $M_{odot}$; (4) a clear correlation between the filling factors and the dimensions of the PNe was not found when distance-independent sets of PNe were used; (5) for extragalactic PNe, where distance errors are not a factor, the filling factors and the ionized masses anticorrelate tightly with the electron densities. The results indicate that the modified Shklowsky distance method is correct." @default.
- W2952052045 created "2019-06-27" @default.
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- W2952052045 date "1993-10-19" @default.
- W2952052045 modified "2023-09-27" @default.
- W2952052045 title "Filling Factors and Ionized Masses in Planetary Nebulae" @default.
- W2952052045 hasPublicationYear "1993" @default.
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