Spatially resolved properties of the ionized gas in the H <scp>ii</scp> galaxy J084220+115000

ABSTRACT We present a spatially resolved spectroscopic study for the metal poor H ii galaxy J084220+115000 using MEGARA Integral Field Unit observations at Gran Telescopio Canarias. estimated gas metallicity direct method oxygen, nitrogen, and helium found mean value of 12 + log (O/H) = 8.03 ± 0.06, integrated electron density temperature ∼161 cm−3 ∼15400 K, respectively. The distribution shows large range Δ(O/H) 0.72 dex between minimum maximum (7.69 0.06 8.42 0.05) values, unusual in dwarf star-forming galaxy. derived an (N/O) ratio −1.51 0.05 that both N/O O/H correspond to primary production metals. Spatially maps indicate appears be photoionized by massive stars according diagnostic line ratios. Between possible mechanisms explain starburst activity variation oxygen abundance this galaxy, our data support scenario where we are witnessing ongoing interaction triggering multiple regions localized two dominant clumps.