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Mid-Infrared properties of Early-type galaxies

Madden, S. C.; Vigroux, L.; Xilouris, E. M.

We have conducted a survey of early-type galaxies using the ISOCAMinstrument on board the Infrared Space Observatory (ISO)in order to probe their dustcontent. We present Mid-Infrared photometric properties for a sampleof 20 galaxies observed at 4.5, 7 and 15 µ$m. Using diagnosticcolor-color diagrams, we can delineate the different Mid-Infrar…