We present the first measure of the evolution of type I and 2 active galactic nuclei (AGN1 and AGN2) in the mid-infrared (15 mu m). We used a sample of 52 AGN selected from the southern ELAIS fields combined with a local sample of 91 AGN from the IRAS Faint Source Catalog. We find that AGN1. follow a luminosity dependent luminosity evolution with a rate k(L)=2.6, which stops at z larger than 2. A similar evolutionary scenario is found for AGN2 with k(L)=2.0-2.6, depending on the adopted k-correction. We estimate that AGN1 contribute about 3% to the cosmic mid-infrared background, while the AGN2 contribution is about 10%.
LA FRANCA, F., Matute, I. (2004). Active galactic nuclei in the MID-IR. Evolution and contribution to the cosmic infrared background. In MULTIWAVELENGTH AGN SURVEYS (pp.329-334). WORLD SCIENTIFIC PUBL CO PTE LTD, PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE [10.1142/9789812702432_0080].
Active galactic nuclei in the MID-IR. Evolution and contribution to the cosmic infrared background
LA FRANCA, Fabio;
2004-01-01
Abstract
We present the first measure of the evolution of type I and 2 active galactic nuclei (AGN1 and AGN2) in the mid-infrared (15 mu m). We used a sample of 52 AGN selected from the southern ELAIS fields combined with a local sample of 91 AGN from the IRAS Faint Source Catalog. We find that AGN1. follow a luminosity dependent luminosity evolution with a rate k(L)=2.6, which stops at z larger than 2. A similar evolutionary scenario is found for AGN2 with k(L)=2.0-2.6, depending on the adopted k-correction. We estimate that AGN1 contribute about 3% to the cosmic mid-infrared background, while the AGN2 contribution is about 10%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
