Metal enrichment in groups of galaxies

We propose to observe the two groups of galaxies NGC 5044 and NGC 5813 each with130 ks exposure time. We will combine these data with archival data of threeother groups. The RGS spectra will reveal accurate abundances of nitrogen andcarbon, key elements produced both by massive stars and intermediate mass AGBstars. The EPIC spectra will give accurate abundances of all elements heavierthan oxygen. The combined spectra allow us to measure the contributions to themetal enrichment by each of the individual categories: intermediate and low massstars, core collapse supernovae and type Ia supernovae. In addition, we willmeasure the spatial distribution of these elements. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]