Table 3
Abundances (by number, in log) of some elements in PN IC 418.
| Element | Gaseous phase | Dust | Total | Solara |
|---|---|---|---|---|
| C | −3.15 | −4.71 | −3.14 | −3.57 |
| Mg | −5.07b | −5.10 | −4.78 | −4.40 |
| Si | −5.55c | −5.55 | −5.25 | −4.49 |
| S | −5.35 | −5.05 | −4.87 | −4.88 |
| Fe | −7.4 | −6.05 | −6.03 | −4.50 |
Notes. For carbon, only the H+ is considered (graphite grains, see Table2). (a)Solar values from Asplund et al. (2009). (b)This value differs slightly from the one obtained by MG09 because of changes in atomic data between different versions of Cloudy. (c) This value is obtained by fitting the [Si II]34.8 μm line, mainly emitted by the PDR.
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