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We use integral field spectroscopic (IFS) observations from GeminiMulti-Object Spectrograph-North (GMOS-N) to analyse the ionised gas in theprincipal star-forming region in the blue compact dwarf galaxy SBS 1415+437.The IFS data enable us to map the weak auroral line [O III] $\lambda$4363 at aspatial scale of $\sim$6.5 pc across a region of $\sim$143 $\times$ 143 pc$^2$.This in turn allows us to use the robust direct T$_e$-method to map the ionicand elemental abundances of nitrogen (N) along with the alpha-elements, oxygen(O), neon (Ne), sulphur (S) and argon (Ar). We utilise these abundances to mapthe relative abundances of N, Ne, S and Ar with respect to O. We segment thispredominantly photoionised region of study into elliptical annuli on the basisof the H$\alpha$ flux distribution to study the variation of chemicalabundances and their ratios, and find no significant chemical variation. Wealso perform chemical abundance analysis on the integrated spectra of theregion under study and elliptical annuli within it. We find that the inferredabundances are in agreement with the median of the abundances obtained from thechemical abundance maps of the principal star-forming region and the mappedvalues within annuli.The finding has important implications for directcomparison with high-redshift observations, where spatial resolution is notavailable, and for a consistent approach to track chemical evolution acrosscosmic time.

Small-scale chemical abundance analysis in a blue compact dwarf galaxy SBS 1415+437