THE DEPENDENCE OF GASEOUS HALOS ON STAR FORMATION ACTIVITY IN GALAXY DISKS

We propose deep XMM obs. of 3 edge on galaxies with newly detected radio halos:NGC4700, NGC7090 and NGC7462. Due to their galaxy scale halos, they are primecandidates for studies of the hot ionized medium at high latitudes above thedisk plane. Compared to other galaxies already observed by XMM, these have theadvantage of being undisturbed, without active AGNs, providing the chance tostudy the nature of hot gas in their halos and its dependence on the starformation activity in the underlying disks. Metal abundance analyses will tellwhether the gas is predominantly produced by SNIa or SNII, thus testingdifferent scenarios of the chemical enrichment of the ISM and IGM. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]