id author title date pages extension mime words sentences flesch summary cache txt work_npstc4efrzco3d62uylmc7hlze P. Beirão Spatially ResolvedSpitzerIRS Spectroscopy of the Central Region of M82 2008 13 .pdf application/pdf 12581 961 77 We present high spatial resolution (�35 pc) 5Y38 �m spectra of the central region of M82, taken with the Spitzer aromatic hydrocarbon (PAH) emission features in six representative regions and analyzed the spatial distribution of The [Ne iii]/[Ne ii] ratio is on average low, at �0.18, and shows little variations across the plane, indicating that PAHs, fine-structure lines, and emission from molecular hydrogen, in addition to the broad silicate absorption features around PAH emission features and a steeply rising continuum, characteristic of classical starburst galaxies (e.g., Brandl et al. The Spitzer IRS spectral maps allow a study of the spatial variation of the radiation field, based on the [Ne iii]/[Ne ii] ratio. Due to the presence of several luminous star clusters in the central region, one might expect strong variations of [Ne iii]/[Ne ii] lines and PAH feature emission among the regions. ./cache/work_npstc4efrzco3d62uylmc7hlze.pdf ./txt/work_npstc4efrzco3d62uylmc7hlze.txt