Table 4: Abundances in Knots 1, 2 and 3 of DDO 68.
Knot 1 Knot 2 Knot 3

Value PA = -90 $^\circ$ PA = 0 $^\circ$ PA = -57 $^\circ$ PA = 0 $^\circ$ PA = -57 $^\circ$ PA = -57 $^\circ$ PA = -57 $^\circ$

$\theta$ = 0 $.\!\!^{\prime\prime}$ 8 $\theta$ = 1 $.\!\!^{\prime\prime}$ 6 $\theta$ = 0 $.\!\!^{\prime\prime}$ 8 $\theta$ = 1 $.\!\!^{\prime\prime}$ 6 $\theta$ = 1 $.\!\!^{\prime\prime}$ 4 $\theta$ = 0 $.\!\!^{\prime\prime}$ 8 $\theta$ = 1 $.\!\!^{\prime\prime}$ 4

$T_{\rm e}$ (OIII)(10³ K) 17.01 $\pm$ 1.32 18.89 $\pm$ 1.33 19.33 $\pm$ 4.27 19.24 $\pm$ 1.90 20.13 $\pm$ 2.07 25.30 $\pm$ 5.92 20.28 $\pm$ 3.28

$T_{\rm e}$ (OII)(10³ K) 14.64 $\pm$ 1.08 15.34 $\pm$ 1.02 15.48 $\pm$ 3.18 15.45 $\pm$ 1.42 15.72 $\pm$ 1.48 16.73 $\pm$ 2.61 15.77 $\pm$ 2.33

$T_{\rm e}$ (SIII)(10³ K) 15.82 $\pm$ 1.1 17.38 $\pm$ 1.11 17.73 $\pm$ 3.54 17.66 $\pm$ 1.58 18.41 $\pm$ 1.72 22.70 $\pm$ 4.92 18.53 $\pm$ 2.72

O⁺/H⁺( $\times$ 10^-5) 0.177 $\pm$ 0.036 0.442 $\pm$ 0.078 0.369 $\pm$ 0.193 0.358 $\pm$ 0.086 0.602 $\pm$ 0.145 0.431 $\pm$ 0.159 0.616 $\pm$ 0.229

O⁺⁺/H⁺( $\times$ 10^-5) 1.489 $\pm$ 0.287 1.205 $\pm$ 0.203 0.944 $\pm$ 0.479 0.965 $\pm$ 0.222 0.886 $\pm$ 0.208 0.470 $\pm$ 0.230 0.686 $\pm$ 0.251

O⁺⁺⁺/H⁺( $\times$ 10^-5) 0.052 $\pm$ 0.015 0.068 $\pm$ 0.016 0.192 $\pm$ 0.074 0.309 $\pm$ 0.110 0.159 $\pm$ 0.053 ... ...

O/H( $\times$ 10^-5) 1.716 $\pm$ 0.289 1.715 $\pm$ 0.218 1.505 $\pm$ 0.521 1.632 $\pm$ 0.262 1.648 $\pm$ 0.260 0.901 $\pm$ 0.280 1.302 $\pm$ 0.339

12+log (O/H) 7.23 $\pm$ 0.07 7.23 $\pm$ 0.06 7.18 $\pm$ 0.16 7.21 $\pm$ 0.07 7.22 $\pm$ 0.07 6.95 $\pm$ 0.14 7.11 $\pm$ 0.11

**Table 4:** Abundances in Knots 1, 2 and 3 of DDO 68.
	Knot 1	Knot 2	Knot 3
Value	PA = -90 $^\circ$	PA = 0 $^\circ$	PA = -57 $^\circ$	PA = 0 $^\circ$	PA = -57 $^\circ$	PA = -57 $^\circ$	PA = -57 $^\circ$
	$\theta$ = 0 $.\!\!^{\prime\prime}$ 8	$\theta$ = 1 $.\!\!^{\prime\prime}$ 6	$\theta$ = 0 $.\!\!^{\prime\prime}$ 8	$\theta$ = 1 $.\!\!^{\prime\prime}$ 6	$\theta$ = 1 $.\!\!^{\prime\prime}$ 4	$\theta$ = 0 $.\!\!^{\prime\prime}$ 8	$\theta$ = 1 $.\!\!^{\prime\prime}$ 4
$T_{\rm e}$ (OIII)(10³ K)	17.01 $\pm$ 1.32	18.89 $\pm$ 1.33	19.33 $\pm$ 4.27	19.24 $\pm$ 1.90	20.13 $\pm$ 2.07	25.30 $\pm$ 5.92	20.28 $\pm$ 3.28
$T_{\rm e}$ (OII)(10³ K)	14.64 $\pm$ 1.08	15.34 $\pm$ 1.02	15.48 $\pm$ 3.18	15.45 $\pm$ 1.42	15.72 $\pm$ 1.48	16.73 $\pm$ 2.61	15.77 $\pm$ 2.33
$T_{\rm e}$ (SIII)(10³ K)	15.82 $\pm$ 1.1	17.38 $\pm$ 1.11	17.73 $\pm$ 3.54	17.66 $\pm$ 1.58	18.41 $\pm$ 1.72	22.70 $\pm$ 4.92	18.53 $\pm$ 2.72
O⁺/H⁺( $\times$ 10^-5)	0.177 $\pm$ 0.036	0.442 $\pm$ 0.078	0.369 $\pm$ 0.193	0.358 $\pm$ 0.086	0.602 $\pm$ 0.145	0.431 $\pm$ 0.159	0.616 $\pm$ 0.229
O⁺⁺/H⁺( $\times$ 10^-5)	1.489 $\pm$ 0.287	1.205 $\pm$ 0.203	0.944 $\pm$ 0.479	0.965 $\pm$ 0.222	0.886 $\pm$ 0.208	0.470 $\pm$ 0.230	0.686 $\pm$ 0.251
O⁺⁺⁺/H⁺( $\times$ 10^-5)	0.052 $\pm$ 0.015	0.068 $\pm$ 0.016	0.192 $\pm$ 0.074	0.309 $\pm$ 0.110	0.159 $\pm$ 0.053	...	...
O/H( $\times$ 10^-5)	1.716 $\pm$ 0.289	1.715 $\pm$ 0.218	1.505 $\pm$ 0.521	1.632 $\pm$ 0.262	1.648 $\pm$ 0.260	0.901 $\pm$ 0.280	1.302 $\pm$ 0.339
12+log (O/H)	7.23 $\pm$ 0.07	7.23 $\pm$ 0.06	7.18 $\pm$ 0.16	7.21 $\pm$ 0.07	7.22 $\pm$ 0.07	6.95 $\pm$ 0.14	7.11 $\pm$ 0.11

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations and reduction
	3 Results
	4 Discussion and conclusions
	References