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| Paper: |
Seyfert and starburst galaxies in the Local Universe and beyond: from ISO observations to predictions for future space missions |
| Volume: |
290, Active Galactic Nuclei: from Central Engine to Host Galaxy |
| Page: |
559 |
| Authors: |
Spinoglio, L.; Andreani, P.; Malkan, M. A. |
| Abstract: |
ISOPHOT photometry is presented for 90 objects (29 Seyfert 1's, 35 Seyfert 2's, 12 starburst galaxies and 14 normal galaxies for comparison), all belonging to the 12 micron galaxy sample. Color-color diagrams and spectral energy distributions are defined using the ISO and the IRAS data. The 60-200 micron SED can be fitted with thermal dust emission at two temperatures (one cold at 15-30K and one warm at 50-70K), with a dust emissivity law proportional to the inverse square of the wavelength. A mild anti-correlation is found between the [200 - 100] color and the "60 micron excess". We infer that galaxies with a strong starburst component, and thus a strong 60 micron flux, have a steeper far-infrared turnover. In non-Seyfert galaxies, increasing the luminosity corresponds to increasing the star formation rate, that enhances the 25 and 60 micron emission. The spectral energy distributions measured by ISO and IRAS in the Local Universe are used to make predictions on the energy distributions at various redshifts for Seyfert and starburst galaxies for the next infrared and submillimeter space missions SIRTF and Herschel. The number of galaxies that could be detected in deep far-IR surveys are also predicted. |
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