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The Mid-Infrared View of Star Formation in Collisional Ring Galaxies

Cesarsky, C.; Sauvage, M.; Vigroux, L. +4 more

We present mid-infrared images and spectra of Arp 10 and Arp 118, two collisional ring galaxies observed as part of the ISOCAM GT program CAMACTIV (P.I.: I.F. Mirabel). The observations reveal the distribution of hot dust in the galaxies and enable us to probe the mechanisms responsible for the heating of the ISM. Unlike the peculiar mid-infrared …