Chemical abundances in the nuclear region of nearby galaxies from the
  Palomar Survey
  We estimate chemical abundances and ionization parameters in the nuclear
region of a sample of 143 galaxies from the Palomar Spectroscopic Survey,
composed by Star-Forming Galaxies (87), Seyferts 2 (16) and LINERs (40) using
the \textsc{Hii-Chi-mistry} code. We also study for each spectral type the
correlation of the derived quantities with other different properties of the
host galaxies, such as morphology, stellar mass, luminosity and mass of their
Supermassive Black Holes. The results obtained for Star-Forming Galaxies are
used to check the soundness of our methodology. Then, we replicate a similar
study for our sample of AGN, distinguishing between Seyferts 2 and LINERs. We
report a saturation of Oxygen abundances for the nuclear regions of SFG. The
correlations between chemical abundances and their host galaxy properties for
SFG are in good agreement with previous studies. We find that Seyferts 2
present slightly higher chemical abundances but this result must be reexamined
in larger samples of Seyfert galaxies. In contrast, we obtain lower chemical
abundances for LINERs than for SFG. We confirm these relatively lower
abundances for another sample of infrared luminous LINERs in the same stellar
mass range. Our analysis of AGNs (both LINERs and Seyferts) shows that their
host galaxy properties are not correlated with our estimated chemical
abundances.
