A comparison between X-shooter spectra and PHOENIX models across the HR-diagram

Open Access

Table 3

Effects of the fitting method on estimated parameters.

	R = 500 vs. R = 3000		R = 500, original model grid		Weighted χ² vs. D, at R = 500
			vs. interpolated grid		(with slightly different masks)

Quantity	Mean	Standard deviation	Mean	Standard deviation	Mean	Standard deviation
δT_eff (K)	22	64	0.7	123	72	239
δ log(g) (cm s⁻²)	0.04	0.22	−0.03	0.5	0.02	0.9
δ [Fe/H] (dex)	0.007	0.15	0.015	0.34	0.07	0.65
δA_V (mag)	0.001	0.08	0.03	0.34	0.16	0.49

Notes. Each subsection of the table lists mean parameter differences and standard deviations obtained when switching between the two methods indicated above the column titles. The listed values are based on fits to data from ALL wavelengths of the XSL spectra (UVB + VIS + NIR).

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