Mapping the starburst in blue compact dwarf galaxies - PMAS integral field spectroscopy of Mrk 1418

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Volume 507 / No 3 (December I 2009)

A&A, 507 3 (2009) 1291-1301

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Table 3:

Physical parameters and abundances.
Parameter	knot 1	knot 2	knot 3	knot 4	knot 5	Nucleus	Integrated
$\log\left(\frac{\left[\mbox{O {\sc iii}}\right]\;\lambda5007}{\mbox{H$\beta$ }}\right)$	$0.56\pm0.02$	$0.54\pm0.02$	$0.50\pm0.03$	$0.25\pm0.03$	$0.52\pm0.04$	$0.37\pm0.05$	$0.50\pm0.02$
$\log\left(\frac{\left[\mbox{N {\sc ii}}\right]\;\lambda6584}{\mbox{H$\alpha$ }}\right)$	$-1.04\pm0.02$	$-1.00\pm0.02$	$-1.12\pm0.05$	$-0.97\pm0.05$	$-1.18\pm0.09$	$-0.94\pm0.08$	$-1.03\pm0.02$
$\log\left(\frac{\left[\mbox{S {\sc ii}}\right]\;\lambda\lambda6717,\;6731}{\mbox{H$\alpha$ }}\right)$	$-0.79\pm0.02$	$-0.73\pm0.02$	$-0.75\pm0.03$	$-0.59\pm0.04$	$-0.77\pm0.07$	$-0.46\pm0.06$	$-0.61\pm0.02$
$N_{\rm e}$ ([S II]) (cm^-3)	190	${\leq}100$	${\leq}100$	108	${\leq}100$	${\leq}100$	${\leq}100$
$T_{\rm e}$ ([O II]) (10⁴ K)	$1.18\pm0.07$	$1.22\pm0.07$	--	--	--	--	$1.67\pm0.30$
$T_{\rm e}$ ([O III]) (10⁴ K)	$1.27\pm0.10$	$1.33\pm0.10$	--	--	--	--	$1.96\pm0.42$
$12+\log(O/H)$ - ( $T_{\rm e}$ )	$8.09\pm0.06$	$8.03\pm0.06$	--	--	--	--	$7.71\pm0.13$
$12+\log(\rm {O/H})$ - (N2)	8.26	8.28	8.23	8.30	8.20	8.31	8.27
$12+\log(\rm {O/H})$ - (O3N2)	8.22	8.24	8.21	8.34	8.19	8.31	8.24
$12+\log({\rm S}^{+}/{\rm H}^{+})$	$5.87\pm0.05$	$5.90\pm0.05$	--	--	--	--	$5.80\pm0.10$
$12+\log({\rm N}^+/{\rm H}^+)$	$6.52\pm0.05$	$6.59\pm0.05$	--	--	--	--	$6.26\pm0.11$
$\log({\rm N/O})$	$-1.29\pm0.10$	$-1.18\pm0.10$	--	--	--	--	$-1.27\pm0.21$

Notes: $T_{\rm e}$ ([O II]) derived from the relation: $T_{\rm e} {\rm ([\mbox{O {\sc ii}}])}=0.72$ $\times$ $T_{\rm e} {\rm ([\mbox{O {\sc iii}}])} + 0.26$ found by Pilyugin et al. (2006); $T_{\rm e}$ ([O III]): electron temperature measured from [O III] $\lambda4363$ ; $12+\log(\rm {O/H})$ - ( $T_{\rm e}$ ): direct O/H abundance derived from $T_{\rm e}$ [O III]; $12+\log(\rm {O/H})$ - (N2): O/H derived from the N2 index (Pettini & Pagel 2004); the associated uncertainty is ${\pm}0.38$ ; $12+\log(\rm {O/H})$ - (O3N2): O/H derived from the O3N2 index (Pettini & Pagel 2004); the associated uncertainty is $\pm0.25$ .

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