**Table 3:** Line intensities in Knots 2, 3 and 7 of DDO 68.
	Knot 2, PA = -57 $^\circ$ , $\theta$ = 0 $.\!\!^{\prime\prime}$ 8		Knot 2, PA = 0 $^\circ$ , $\theta$ = 1 $.\!\!^{\prime\prime}$ 6		Knot 2, PA = -57 $^\circ$ , $\theta$ = 1 $.\!\!^{\prime\prime}$ 4
$\lambda_{0}$ (Å) Ion	F( $\lambda$ )/F(H $\beta$ )	I( $\lambda$ )/I(H $\beta$ )	F( $\lambda$ )/F(H $\beta$ )	I( $\lambda$ )/I(H $\beta$ )	F( $\lambda$ )/F(H $\beta$ )	I( $\lambda$ )/I(H $\beta$ )
3727 [O II]	0.464 $\pm$ 0.025	0.467 $\pm$ 0.027	0.451 $\pm$ 0.023	0.451 $\pm$ 0.025	0.698 $\pm$ 0.035	0.798 $\pm$ 0.045
3967 [Ne III] + H7	...	...	0.221 $\pm$ 0.013	0.221 $\pm$ 0.019	0.176 $\pm$ 0.011	0.227 $\pm$ 0.021
4101 H $\delta$	0.247 $\pm$ 0.022	0.263 $\pm$ 0.023	0.264 $\pm$ 0.015	0.264 $\pm$ 0.020	0.230 $\pm$ 0.013	0.280 $\pm$ 0.022
4340 H $\gamma$	0.470 $\pm$ 0.033	0.474 $\pm$ 0.046	0.486 $\pm$ 0.026	0.486 $\pm$ 0.028	0.424 $\pm$ 0.024	0.469 $\pm$ 0.029
4363 [O III]	0.049 $\pm$ 0.018	0.049 $\pm$ 0.018	0.049 $\pm$ 0.008	0.049 $\pm$ 0.008	0.051 $\pm$ 0.008	0.053 $\pm$ 0.009
4686 He II	0.121 $\pm$ 0.015	0.120 $\pm$ 0.015	0.096 $\pm$ 0.007	0.096 $\pm$ 0.007	0.082 $\pm$ 0.008	0.082 $\pm$ 0.009
4861 H $\beta$	1.000 $\pm$ 0.017	1.000 $\pm$ 0.022	1.000 $\pm$ 0.007	1.000 $\pm$ 0.007	1.000 $\pm$ 0.007	1.000 $\pm$ 0.008
4959 [O III]	0.517 $\pm$ 0.031	0.515 $\pm$ 0.031	0.524 $\pm$ 0.027	0.524 $\pm$ 0.027	0.537 $\pm$ 0.028	0.522 $\pm$ 0.028
5007 [O III]	1.538 $\pm$ 0.078	1.532 $\pm$ 0.078	1.548 $\pm$ 0.077	1.548 $\pm$ 0.078	1.620 $\pm$ 0.081	1.564 $\pm$ 0.080
5876 He I	0.087 $\pm$ 0.012	0.086 $\pm$ 0.012	0.061 $\pm$ 0.005	0.061 $\pm$ 0.005	0.087 $\pm$ 0.007	0.077 $\pm$ 0.006
6300 [O I]	...	...	...	...	0.020 $\pm$ 0.010	0.017 $\pm$ 0.009
6312 [S III]	...	...	...	...	0.015 $\pm$ 0.012	0.013 $\pm$ 0.011
6563 H $\alpha$	2.777 $\pm$ 0.140	2.740 $\pm$ 0.151	2.651 $\pm$ 0.133	2.651 $\pm$ 0.144	3.286 $\pm$ 0.167	2.744 $\pm$ 0.155
6678 He I	0.034 $\pm$ 0.015	0.030 $\pm$ 0.015	0.012 $\pm$ 0.004	0.012 $\pm$ 0.004	0.028 $\pm$ 0.007	0.023 $\pm$ 0.006
6717 [S II]	0.066 $\pm$ 0.017	0.065 $\pm$ 0.017	0.035 $\pm$ 0.007	0.035 $\pm$ 0.007	0.056 $\pm$ 0.009	0.046 $\pm$ 0.008
6731 [S II]	...	...	0.022 $\pm$ 0.006	0.022 $\pm$ 0.006	0.027 $\pm$ 0.007	0.022 $\pm$ 0.006
7136 [Ar III]	...	...	0.028 $\pm$ 0.009	0.028 $\pm$ 0.009	0.021 $\pm$ 0.007	0.017 $\pm$ 0.005
C(H $\beta$ ) dex	0.02 $\pm$ 0.07		0.00 $\pm$ 0.07		0.22 $\pm$ 0.07
EW (abs) Å	0.75 $\pm$ 6.18		0.00 $\pm$ 2.24		3.70 $\pm$ 1.55
F(H $\beta$ )^a	12.1 $\pm$ 0.7		13.7 $\pm$ 0.7		13.6 $\pm$ 0.7
EW (H $\beta$ ) Å	286 $\pm$ 5		299 $\pm$ 2		198 $\pm$ 2
Rad. vel. km s^-1	528 $\pm$ 33		411 $\pm$ 33		447 $\pm$ 45
	Knot 3, PA = -57 $^\circ$ , $\theta$ = 0 $.\!\!^{\prime\prime}$ 8		Knot 3, PA = -57 $^\circ$ , $\theta$ = 1 $.\!\!^{\prime\prime}$ 4		Knot 7, PA = 40 $^\circ$ , $\theta$ = 1 $.\!\!^{\prime\prime}$ 2
$\lambda_{0}$ (Å) Ion	F( $\lambda$ )/F(H $\beta$ )	I( $\lambda$ )/I(H $\beta$ )	F( $\lambda$ )/F(H $\beta$ )	I( $\lambda$ )/I(H $\beta$ )	F( $\lambda$ )/F(H $\beta$ )	I( $\lambda$ )/I(H $\beta$ )
3727 [O II]	0.656 $\pm$ 0.034	0.678 $\pm$ 0.040	0.656 $\pm$ 0.033	0.823 $\pm$ 0.045	1.085 $\pm$ 0.082	1.194 $\pm$ 0.095
4101 H $\delta$	0.205 $\pm$ 0.016	0.278 $\pm$ 0.028	0.211 $\pm$ 0.013	0.249 $\pm$ 0.021	0.388 $\pm$ 0.089	0.413 $\pm$ 0.109
4340 H $\gamma$	0.421 $\pm$ 0.030	0.474 $\pm$ 0.038	0.454 $\pm$ 0.027	0.503 $\pm$ 0.032	0.465 $\pm$ 0.059	0.484 $\pm$ 0.094
4363 [O III]	0.061 $\pm$ 0.018	0.060 $\pm$ 0.018	0.039 $\pm$ 0.010	0.042 $\pm$ 0.011	0.029 $\pm$ 0.038	0.031 $\pm$ 0.040
4861 H $\beta$	1.000 $\pm$ 0.016	1.000 $\pm$ 0.018	1.000 $\pm$ 0.009	1.000 $\pm$ 0.010	1.000 $\pm$ 0.038	1.000 $\pm$ 0.042
4959 [O III]	0.438 $\pm$ 0.026	0.418 $\pm$ 0.026	0.412 $\pm$ 0.022	0.403 $\pm$ 0.022	0.212 $\pm$ 0.029	0.210 $\pm$ 0.029
5007 [O III]	1.329 $\pm$ 0.069	1.264 $\pm$ 0.069	1.270 $\pm$ 0.064	1.235 $\pm$ 0.063	0.600 $\pm$ 0.032	0.593 $\pm$ 0.032
5876 He I	0.094 $\pm$ 0.012	0.085 $\pm$ 0.011	0.088 $\pm$ 0.008	0.075 $\pm$ 0.007	0.118 $\pm$ 0.018	0.110 $\pm$ 0.017
6548 [N II]	...	...	0.010 $\pm$ 0.007	0.008 $\pm$ 0.005	0.006 $\pm$ 0.023	0.005 $\pm$ 0.021
6563 H $\alpha$	3.019 $\pm$ 0.152	2.690 $\pm$ 0.154	3.535 $\pm$ 0.179	2.750 $\pm$ 0.152	2.977 $\pm$ 0.062	2.683 $\pm$ 0.062
6584 [N II]	...	...	0.035 $\pm$ 0.020	0.027 $\pm$ 0.016	0.029 $\pm$ 0.035	0.026 $\pm$ 0.032
6678 He I	0.026 $\pm$ 0.009	0.023 $\pm$ 0.008	0.024 $\pm$ 0.006	0.019 $\pm$ 0.004	...	...
6717 [S II]	0.056 $\pm$ 0.018	0.050 $\pm$ 0.016	0.066 $\pm$ 0.012	0.051 $\pm$ 0.009	0.056 $\pm$ 0.024	0.050 $\pm$ 0.021
6731 [S II]	0.019 $\pm$ 0.015	0.017 $\pm$ 0.014	0.035 $\pm$ 0.011	0.027 $\pm$ 0.009	...	...
C(H $\beta$ ) dex	0.10 $\pm$ 0.07		0.32 $\pm$ 0.07		0.14 $\pm$ 0.07
EW (abs) Å	3.20 $\pm$ 0.61		0.25 $\pm$ 0.63		0.05 $\pm$ 5.71
F(H $\beta$ )^a	8.5 $\pm$ 0.5		9.1 $\pm$ 0.5		3.4 $\pm$ 0.2
EW (H $\beta$ ) Å	75 $\pm$ 1		77 $\pm$ 1		86 $\pm$ 3
Rad. vel. km s^-1	501 $\pm$ 36		447 $\pm$ 39		309 $\pm$ 93

^a In units of 10^-16 ergs s^-1cm^-2.

Source LaTeX | All tables | In the text

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