Fine-structure infrared lines from the Cassiopeia A knots

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Table 9:

Summary of elemental abundance $n_{\rm element}/n_{\rm O}$ values in Cas A ejecta from various sources.
	CK78	CK79	Wil02	LH03	Laz06	Used in this paper
Method	Optical	Optical	X-ray	X-ray	X-ray	-
Ne/O	0.025	<0.013	0.02	-	-	0.02
Mg/O	<0.04	<0.005	0.004	-	0.005-0.03	0.005
Si/O	-	-	0.025	0.003-0.015	0.008-0.06	0.05
S/O	0.06	0.002-0.7	0.014	-	0.006-0.05	0.05
Ar/O	0.004	0.003-0.1	0.0035	-	-	0.005
Fe/O	0.003	<0.001	0.006-0.02	0.002-0.01	-	0.005

The ``average'' data used in this paper are shown in the last column. Data source abbreviations: Chevalier & Kirshner (1978) - CK78, Chevalier & Kirshner (1979) - CK79, Willingale et al. (2002) - Wil02, Laming & Hwang (2003) - LH03, Lazendic et al. (2006) - Laz06.

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