Astronomy and Astrophysics – Astronomy
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...196.3607c&link_type=abstract
American Astronomical Society, 196th AAS Meeting, #36.07; Bulletin of the American Astronomical Society, Vol. 32, p.732
Astronomy and Astrophysics
Astronomy
Scientific paper
I will present a review on the mid-IR (5--16 microns) spectral imaging of a sequence of nearby interacting galaxies observed by ISOCAM, the mid-IR camera on board ISO. The galaxies are part of the well known Toomre's ``merger sequence'' which was defined as a sample of galaxies depicting progressive snapshots in the time evolution of a merging event. It will be shown that the ratio of the 15 to 7 micron flux correlates well with the IRAS colors of the galaxies, and that using it in conjunction with the [NeII] and [NeIII] lines one can trace the intensity of the radiation field in a starburst. This suggests that even though the bolometric luminosity of merging luminous infrared galaxies is dominated by emission at wavelengths longer than 40 microns, the study of the mid-IR spectral energy distribution is a powerful tool in understanding their global star formation history.
Charmandaris Vassilios
Gallais Pascal
Laurent Olivier
Mirabel Felix I.
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