Gaseous abundances in M82

(2) INAF-Osservatorio Astronomico di Bologna; (3) INAF-Osservatorio astrofisico di Arcetri; 4) ((1) RIKEN; (4) University of Tokyo); Andrea Comastri (2); Japan; Kazuo Makishima (1; Livia Origlia (2); Piero Ranalli (1); Roberto Maiolino (3)

arxiv: astro-ph/0511021 · v1 · submitted 2005-11-01 · 🌌 astro-ph

Gaseous abundances in M82

Piero Ranalli (1) , Andrea Comastri (2) , Livia Origlia (2) , Roberto Maiolino (3) , Kazuo Makishima (1 , 4) ((1) RIKEN , Japan , (2) INAF-Osservatorio Astronomico di Bologna

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(3) INAF-Osservatorio astrofisico di Arcetri (4) University of Tokyo)

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keywords elementsabundancesdistributiongaseousabundantalpha-elementsanalisysanalysis

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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.

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Gaseous abundances in M82

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