All Tables

Table 1: The observed H II regions in Sextans A and Sextans B. The centres of the slits are reported. The adopted names of H II regions are from Hodge et al. (1994) for Sextans A and from Strobel et al. (1991) for Sextans B. The HII region not identified in previous works is labeled as H II H.
Table 2: Observed line fluxes $F_\lambda$ of PNe in Sextans A and Sextans B, on a scale where F(H $\beta$ ) = 100.0, and after correcting for atmospheric dispersion effects. ":'' indicates uncertain values, and "<'' upper limits. Associated errors are described in the text. Some nebular quantities are also reported: $c_{\beta }$ , the electron density and temperatures $T_{\rm e}$ ([O III]) and $T_{\rm e}$ ([N II]), and the heliocentric radial velocity of three PNe where it was measured.
Table 3: Observed line fluxes $F_\lambda$ , on a scale where F(H $\beta$ ) = 100.0, and nebular parameters of the H II regions in Sextans A and Sextans B. Symbols are as in Table 1.
Table 4: Total and ionic chemical abundances, and ionization correction factors of Sextans A and Sextans B PNe, computed with the ICF method.
Table 5: Total and ionic chemical abundances, and ionization correction factors of Sextans A and Sextans B H II regions, computed with the ICF method.
Table 6: Total chemical abundances of Sextans A and Sextans B PNe computed with both ICF and CLOUDY methods. We also report the unweigthed average of the two results. Metal abundances are expressed in 12+ $\log~$ (X/H).
Table 7: $T_{\star }$ and $L_{\star }$ of the PNe in Sextans A and Sextans B as derived with the modelling with CLOUDY.
Table 8: The chemical abundances of H II regions in Sextans A. Where the electron temperature is measured, values derived with both the CLOUDY and the ICF methods are indicated. In the remaining cases, marked with a "*'', only the determinations done with CLOUDY are listed. In computing the average abundances, upper limits of individual determinations are not considered.
Table 9: The same as in Table 8, but for Sextans B.