Two LMC Superbubbles With Evidence of SNR Shocks

Superbubbles (SBs) are formed by the combined actions of stellar winds andsupernova explosions from massive stars in OB associations. These objectscontribute significantly to the hot gas component of a galaxy.s interstellarmedium (ISM), as well as affecting the structure of the ISM to large scales. Wepropose XMMNewton observations of two SBs in the Large Magellanic Cloud, N70and N185, with indicators of recent interior SNe. From their Xray spectra, wewill investigate (a) enhanced abundances indicating recent enrichment by SNejecta; (b) the energy budgets of the SBs, and whether those are consistent withexpected stellarwind inputs; and (c) the required input of SNRs to these SBs toobtain the observed energies. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]