Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999iaus..192..330l&link_type=abstract
The stellar content of Local Group galaxies, Proceedings of the 192nd symposium of the International Astronomical Union held in
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We present deep 850-350 micron imaging of the nearby prototype starburst galaxy M82 in order to study large-scale outflows observed in such galaxies and associated with starburst phenomena. The data were obtained with the JCMT's new submillimetre continuum camera SCUBA. The high resolution maps show the double peaks that have been seen in the mid-infrared and CO line transitions observations as well as in 450 micron maps made with the previous JCMT bolometer and were modelled as thermal reradiation from a dusty-molecular torus. Spectral index analysis on the new maps allows a detailed study of the geometry and structure of the edge-on torus. For the first time an asymmetrical submillimetre halo of at least 2.5 kpc diameter is seen outside the torus. The nature of the observed submillimetre halo and its relation to co-spatial X-ray, optical and Hα emission will be discussed in the context of models of the nucleus in M82 in particular, and the starburst-driven outflows in nearby galaxies in general.
Hughes David H.
Leeuw Lerothodi
Robson Ian E.
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