Using integral field data we extract the optical spectra of shocked interstellar clouds in Kepler ’ s supernova remnant located in the inner regions of our Galaxy , as well as in the Large Magellanic Cloud ( LMC ) , the Small Magellanic Cloud ( SMC ) , NGC6822 and IC 1613 .
Using self-consistent shock modelling , we make a new determination of the chemical composition of the interstellar medium ( ISM ) in N , O , Ne , S , Cl and Ar in these galaxies and obtain accurate estimates of the fraction of refractory grains destroyed in the shock .
By comparing our derived abundances with those obtained in recent works using observations of B stars , F supergiant stars and HII regions , we provide a new calibration for abundance scaling in the range 7.9 \lesssim 12 + \log { \mathrm { O / H } } \lesssim 9.1 .