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The scaling relationship is a fundamental probe of the evolution of galaxies.Using the integral field spectroscopic data from the Mapping Nearby Galaxies atApache Point Observatory survey, we select 1698 spaxels with significantdetection of the auroral emission line \oiii$\lambda$4363 from 52 galaxies toinvestigate the scaling relationships at the low-metallicity end. We find thatour sample's star formation rate is higher and its metallicity is lower in thescaling relationship than the star-forming sequence after removing thecontribution of the Fundamental Metallicity Relation.We also find that thestellar ages of our sample are younger ($<$ 1 Gyr) and the stellarmetallicities are also lower. Morphological parameters from Deep Learningcatalog indicate that our galaxies are more likely to be merger. These resultssuggest that their low metallicity regions may be related to interaction, theinflow of metal-poor gas may dilute the interstellar medium and form newmetal-poor stars in these galaxies during interaction.

astrophysical journal/the astrophysical journal

Sub-galactic scaling relations with T$_{\rm e}$-based metallicity of low  metallicity regions in galaxies: metal-poor gas inflow may have important  effects?