Abstract
We present mid-JR (5–16µm) images and spectra of a sequence of interacting galaxies, observed by ISOCAM. The galaxies were selected as being at progressive stages in the time evolution of a merging event and having no detected contribution from an active galactic nucleus (AGN) in their mid-IR spectrum. To trace the intensity of the global star formation in those galaxies, we use the ratio of the 15µm to 7µm flux. Our analysis indicates that this ratio increases from ~ l to ~ 5 as galaxies move from the pre-starburst to the merging/starburst phase only to decrease to ~ 1 again in the poststarburst phase of the evolved merger remnants. Moreover, we find that the variation of this ratio is well correlated with the one of the IRAS 25µm/12µm and 60µm/100µm flux ratios. Improving upon these results using the Infrared Spectrograph (IRS) on board the Space Infrared Telescope Facility (SIRTF) is briefly discussed.
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© 2001 Springer Science+Business Media Dordrecht
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Charmandaris, V., Laurent, O., Mirabel, I.F., Gallais, P. (2001). ISOCAM Observations of a Galaxy Merging Sequence. In: Vílchez, J.M., Stasińska, G., Pérez, E. (eds) The Evolution of Galaxies. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-3313-7_6
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DOI: https://doi.org/10.1007/978-94-017-3313-7_6
Publisher Name: Springer, Dordrecht
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