OXYGEN AND IRON ABUNDANCES IN NEARBY GALAXIES USING ULTRALUMINOUS X-RAY SOURCES

Lisa Winter, Richard Mushotzky, Christopher Reynolds
unpublished
We determined oxygen and iron abundances of the in-terstellar medium (ISM) using K-shell (O) and L-shell (Fe) X-ray photo-ionization edges towards Ultra luminous X-ray sources (ULXs). We determine the hydrogen column densities (n) towards the ULXs from XMM-Newton archival spectra of 14 ULX sources. We compare our X-ray values with those obtained from radio HI observations for 8 of the sources. The X-ray model n values are in good agreement with the HI n values, implying that the hydrogen
more » ... the hydrogen absorption towards the ULX is not local to the source, with the exception of M81 X-1. Oxygen abundances and iron abundances are roughly solar for the host galaxies.
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