Mid-infrared imaging of collisional ring galaxies with ISOCAM

Details Mid-infrared imaging of collisional ring galaxies with ISOCAM Mid-infrared imaging of collisional ring galaxies with ISOCAM

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..869c&link_type=abstract

The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 869

Physics

2

Interacting Galaxies, Starburst

Scientific paper

We present mid-IR images and spectra of three collisional ring galaxies observed as part of the ISO GT program CAMACTIV (P.I.: I.F. Mirabel) by ISOCAM. 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. Even though the mid-IR colors of Arp 10 were typical of those found in spiral arms of late type spirals, the Cartwheel (AM 0035-33) galaxy revealed a surprisingly strong mid-IR emission from the nucleus which we attribute to a previously undetected star formation activity. The third ring of the sample, Arp 118, harbours a Seyfert 2 nucleus which exhibits a clearly detected hot continuum in the [5.1-6.7] μm range.

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