Massive star formation in Wolf-Rayet galaxies - II. Optical spectroscopy results

A. R. López-Sánchez; C. Esteban

doi:10.1051/0004-6361/200912042

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Volume 508 / No 2 (December III 2009)

A&A, 508 2 (2009) 615-640

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Table A.8:

Physical conditions and chemical abundances of the ionized gas of the regions analyzed in IRAS 08208+2816.
Region	C	#3^a	#5^a	#8^a	#10^a
$T_{\rm e}$ (O III) (K)	$10~100 \pm 700$	$9400 \pm 900$	$9600 \pm 1000$	$6750 \pm 1000$	$9500 \pm 1000$
$T_{\rm e}$ (O II) (K)	$10~100 \pm 500$	$9600 \pm 700$	$9700 \pm 800$	$7700 \pm 800$	$9650 \pm 800$
$n_{\rm e}$ (cm^-3)	<100	<100	<100	<100	<100
12+log(O⁺/H⁺)	7.77 $\pm$ 0.09	8.15 $\pm$ 0.13	8.08 $\pm$ 0.15	8.39 $\pm$ 0.15	8.20 $\pm$ 0.18
12+log(O⁺⁺/H⁺)	8.20 $\pm$ 0.07	8.01 $\pm$ 0.11	8.10 $\pm$ 0.12	8.28 $\pm$ 0.14	7.82 $\pm$ 0.17
12+log(O/H)^c	8.33 $\pm$ 0.08	8.24:	8.27:	...	...
12+log(O/H)^d	8.41 $\pm$ 0.10	8.39 $\pm$ 0.11	8.39 $\pm$ 0.13	8.64 $\pm$ 0.15	8.35 $\pm$ 0.17
log(O⁺⁺/O⁺)	0.43 $\pm$ 0.12	0.15 $\pm$ 0.17	0.02 $\pm$ 0.19	-0.10 $\pm$ 0.20	-0.38 $\pm$ 0.22
12+log(N⁺/H⁺)	6.88 $\pm$ 0.05	6.98 $\pm$ 0.08	6.96 $\pm$ 0.10	7.54 $\pm$ 0.10	6.97 $\pm$ 0.14
12+log(N/H)	7.44 $\pm$ 0.10	7.22 $\pm$ 0.11	7.27 $\pm$ 0.13	7.80 $\pm$ 0.16	7.12 $\pm$ 0.17
log(N/O)	-0.89 $\pm$ 0.11	-1.17 $\pm$ 0.13	-1.12 $\pm$ 0.14	-0.84 $\pm$ 0.15	-1.22 $\pm$ 0.18
12+log(S⁺/H⁺)	5.94 $\pm$ 0.05	6.25 $\pm$ 0.08	6.33 $\pm$ 0.09	6.73 $\pm$ 0.12	6.34 $\pm$ 0.13
12+log(S⁺⁺/H⁺)	6.52 $\pm$ 0.16	6.56 $\pm$ 0.28	...	...	...
12+log(S/H)	6.69 $\pm$ 0.13	6.75 $\pm$ 0.23	...	...	...
log(S/O)	-1.64 $\pm$ 0.16	-1.64 $\pm$ 0.25	...	...	...
12+log(Ne⁺⁺/H⁺)	7.52 $\pm$ 0.11	7.37 $\pm$ 0.19	7.53 $\pm$ 0.22	7.60 $\pm$ 0.25	...
12+log(Ne/H)	7.66 $\pm$ 0.11	7.75 $\pm$ 0.18	7.82 $\pm$ 0.22	7.96 $\pm$ 0.25	...
log(Ne/O)	-0.67 $\pm$ 0.13	-0.64 $\pm$ 0.21	-0.57 $\pm$ 0.25	-0.68 $\pm$ 0.26	...
12+log(Ar⁺²/H⁺)	5.78 $\pm$ 0.08	6.11 $\pm$ 0.15	...	...	...
12+log(Ar/H)	5.86 $\pm$ 0.11	5.92 $\pm$ 0.15	...	...	...
log(Ar/O)	-2.51 $\pm$ 0.15	-2.47 $\pm$ 0.18	...	...	...
12+log(Fe⁺⁺/H⁺)	5.90 $\pm$ 0.15	...	...	...	...
12+log(Fe/H)	6.47 $\pm$ 0.15	...	...	...	...
log(Fe/O)	-1.95 $\pm$ 0.17	...	...	...	...
12+log(He⁺/H⁺)	10.97 $\pm$ 0.04	10.95 $\pm$ 0.07	11.03 $\pm$ 0.09	10.90 $\pm$ 0.12	10.94:
[O/H]^b	-0.33 $\pm$ 0.13	-0.27	-0.27	-0.02	-0.31

^a Electron temperatures estimated using empirical relations; ^b [O/H] = $\log$ (O/H)-log(O/H) $_{\odot}$ , using 12+log(O/H) $_{\odot}$ = $8.66 \pm 0.05$ (Asplund et al. 2005); ^c oxygen abundance computed using the direct method; ^d oxygen abundance computed using the empirical calibrations given by Pilyugin (2001b,a).

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