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(Abridged) Aims: By means of optical Integral Field Spectroscopy (IFS)observations, we aim to disentangle and characterize the starburst component inthe BCD Mrk 1418. In particular we propose to study the stellar and ionized gasmorphology, to investigate the ionization mechanism(s) acting in theinterstellar medium, to derive the physical parameters and abundances of theionized gas.  Methods: IFS observations of Mrk 1418 were carried out with PMAS at the 3.5 mtelescope at CAHA. The central 16"x16" were mapped. From these data we builtmaps of the most prominent emission lines, namely [OII], H-beta, [OIII],H-alpha, [NII] and [SII] as well as of several continuum bands, plus maps ofthe main line ratios: [OIII]/H-beta, [NII]/H-alpha, [SII]/H-alpha, andH-alpha/H-beta, and derived the physical parameters and gaseous metalabundances of the different star-forming regions detected in the field of view.  Results: Mrk 1418 shows a distorted morphology both in the continuum and inthe ionized gas maps; the current star-formation episode is taking place infive knots, distributed around the nucleus of the galaxy. The interstellarmedium surrounding these knots is photo-ionized by stars, with no clearevidence for other excitation mechanisms. The galaxy displays an inhomogeneousdust distribution, with the high H-alpha/H-beta ratio in the central areasindicating a large amount of dust. The oxygen abundances derived for theindividual star-forming knots are very similar, suggesting that the ionizedinterstellar medium is chemically homogeneous in O/H over spatial scales ofhundreds of parsecs. This abundance (Z~0.4 Z_solar from the empiricalcalibrations) places Mrk 1418 among the high metallicity BCD group.

Mapping the starburst in Blue Compact Dwarf Galaxies. PMAS Integral Field Spectroscopy of Mrk 1418