Gaseous abundances in M82

Gaseous abundances in M82,Piero Ranalli,Andrea Comastri,Livia Origlia,Roberto Maiolino,Kazuo Makishima

Gaseous abundances in M82  
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We present the preliminary analysis of a deep (100ks) XMM-Newton observation of M82. The spatial distribution of the abundances of chemical elements (Fe, O, Ne, Mg, Si, S) is investigated through narrow-band imaging analisys and spatially-resolved spectroscopy. We find that the abundances of alpha-elements follow a bipolar distribution, these elements being more abundant in the gaseous outflow than in the galaxy centre. This behaviour is found to be more marked for lighter elements (O, Ne) than for heavier elements.
Published in 2005.
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