Abstract
Results of near-infrared integral field spectroscopy of the starburst galaxy M 82, obtained with the MPE (Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany) 3D instrument, are presented. These data provide the spatial distribution of key diagnostics (e.g. HI and HeI nebular emission lines, atomic and molecular stellar absorption features) for the composition of the populations of hot massive stars and cool evolved stars, on scales of 20–25pc. Together with mid-infrared spectroscopy from the Short Wavelength Spectrometer (SWS) on board the ISO satellite (ISO is an ESA project with instruments funded by ESA member States (especially the PI countries: France, Germany, the Netherlands and the United Kingdom) with the participation of ISAS and NASA. SWS is a joint project of SRON and MPE) and data from the literature, the 3D data are analyzed with a starburst model to constrain quantitatively the cutoffs of the initial mass function, and the spatial and chronological evolution of starburst activity.
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