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Chemical enrichment of the complex hot ISM of the Antennae galaxies: I. Spatial and spectral analysis of the diffuse X-ray emission

We present an analysis of the properties of the hot interstellar medium (ISM) in the merging pair of galaxies known as The Antennae (NGC 4038/39), performed using the deep, coadded ~411 ks Chandra ACIS-S data set. These deep X-ray observations and Chandra's high angular resolution allow us to investigate the properties of the hot ISM with unprecedented spatial and spectral resolution. Through a spatially resolved spectral analysis, we find a variety of temperatures (from 0.2 to 0.7 keV) and Nh (from Galactic to 2x10^21 cm^-2). Metal abundances for Ne, Mg, Si, and Fe vary dramatically throughout the ISM from sub-solar values (~0.2) up to several times solar.

preprint2005arXivOpen access
A. BaldiJ. C. RaymondG. FabbianoA. ZezasA. H. RotsF. SchweizerA. R. KingT. J. Ponman
astro-ph
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A. BaldiJ. C. RaymondG. FabbianoA. ZezasA. H. RotsF. SchweizerA. R. KingT. J. Ponman

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