Ionization of heavy elements and the adiabatic exponent in the solar plasma

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Table 2

Mass fractions of heavy elements determined from a given Z contribution δ_ZΓ₁, absolute error ΔZ_i and relative error ΔZ_i/Z_i.

	AGSS09			GN93			OPAL			SAS5

Elem.						ΔZ_i/Z_i, %			ΔZ_i/Z_i, %			ΔZ_i/Z_i, %
C	0.3666	33	0.9	0.3578	34	1.0	0.3830	17	0.4	0.5505	48	0.9
N	0.1066	2	0.2	0.1092	5	0.4	0.1136	19	1.7	0.1363	−8	−0.6
O	0.8803	−2	−0.02	0.9856	−8	−0.1	1.0841	1.0841	−19	−0.2	0.9923	−11	−0.1
Ne	0.1937	7	0.3	0.1980	8	0.4	0.4204	−6	−0.1	0.0889	26	3.0
Mg	0.1154	66	6.1	0.0830	61	8.0	0.0057	57	–	0.0854	47	5.8
Si	0.0970	−51	−5.0	0.0783	−45	−5.5	−0.0032	−32	–	0.0616	−40	−6.1
S	0.0472	−3	−0.6	0.0425	−7	−1.6	−0.0012	−12	–	0.0256	−11	−4.2
Fe	0.1961	−24	−1.2	0.1481	−21	−1.4	−0.0006	−6	–	0.0614	−27	−4.2

Z^LS	0.020028			0.020026			0.020018			0.020024
η	2.320 × 10⁻⁶			2.525 × 10⁻⁶			2.704 × 10⁻⁶			2.996 × 10⁻⁶
ɛ	2.513 × 10⁻⁷			2.778 × 10⁻⁷			2.280 × 10⁻⁷			5.249 × 10⁻⁷
σ	2.307 × 10⁻⁶			2.509 × 10⁻⁶			2.694 × 10⁻⁶			2.949 × 10⁻⁶

Notes. The results are obtained from the decomposition using all eight considered elements, whereas the OPAL mixture includes only four elements.

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