The chemical composition of the Orion star forming region - I. Homogeneity of O and Si abundances in B-type stars

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Table 17:

Results from the abundance analysis of HD 36430 (B2 V).
HD 36430	$T_{\rm eff}$ = 18 400 K, log g = 4.1 dex			$\xi_{\rm t}$ (Si)=3.5
Line	EW	$\Delta$ EW	$\epsilon_{\rm Si}$	$\Delta\epsilon_{\rm Si}$
	(mÅ)	(mÅ)	(dex)	(dex)
SiII3862	61	5	7.43	0.13
SiII6347	100	10	7.57	0.16
SiII6371	74	6	7.49	0.12
SiIII4552	77	3	7.55	0.06
SiIII4567	53	2	7.40	0.05
SiIII4574	28	5	7.37	0.19
SiIII5739	25	2	7.47	0.08
			$\epsilon_{\rm Si}$ = 7.47	$\Delta\epsilon_{\rm Si}$ ( $\sigma$ ) = 0.08
	$\Delta$ $\xi_{\rm t}$ (Si) = 1.0		$\Rightarrow$	$\Delta\epsilon_{\rm Si}$ ( $\xi_{\rm t}$ ) = 0.07

HD 36430	$T_{\rm eff}$ = 18 400 K, log g = 4.1 dex			$\xi_{\rm t}$ (O)=6.3
OII3954	19	5	8.77	0.26
OII4317	20	5	8.75	0.24
OII4319	20	5	8.76	0.25
OII4366	18	4	8.64	0.21
OII4414	33	3	8.78	0.10
OII4416	26	7	8.85	0.29
OII4641	27	5	8.74	0.20
OII4650	36	2	8.66	0.06
OII4661	18	3	8.72	0.16
OII4676	18	4	8.78	0.21
OII4069	37	3	8.86	0.09
OII4072	27	4	8.82	0.18
			$\epsilon_{\rm O}$ = 8.76	$\Delta\epsilon_{\rm O}$ ( $\sigma$ ) = 0.07
	$\Delta$ $\xi_{\rm t}$ (O) = 2.2		$\Rightarrow$	$\Delta\epsilon_{\rm O}$ ( $\xi_{\rm t}$ ) = 0.08

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