GASP XXXV: Characteristics of the Diffuse Ionised Gas in Gas-stripped Galaxies

The diffuse ionized gas (DIG) is an important component of the interstellar medium that can provide insights into different physical processes affecting in galaxies. We utilise optical IFU observations 71 gas-stripped and control galaxies from Gas Stripping Phenomena (GASP) survey, to analyze properties dense DIG, such as metallicity, ionization parameter log(q), difference between measured $\log[OI]/H\alpha$ value predicted by star-forming models, given log[OIII]/H$\beta$ ($\Delta log[OI]/H\alpha$). compare these at spatial scales, among gas-stripping stages, disks tails stripped metallicity similar DIG a galactocentric radius. log(q) lower for compared gas. median values correlate best with stellar mass, most massive show increase toward their galactic centers. clearly shows higher $\Delta log[OI]/H\alpha$ gas, much spaxels having LIER/LINER like emission. regions highly highest log[OI]/H\alpha$, exhibit high extend large projected distances areas (up 10 kpc). conclude least partly process other than star-formation, probably mixing, shocks accretion inter-cluster