Oral Presentation

Does AGN Fraction Have Redshift or Luminosity Dependence? An Extinction-Free Test based on the 18-bands Infrared SED Fitting using AKARI NEP Wide Data

Author(s): Chia-Ying Chiang, Tomo Goto, Seong-Jin Kim

Presenter: Seong-Jin Kim (NTHU)

To find more obscured AGN is really interesting and to see their evolutionary properties is very important. We use the AKARI's NEP-Wide field sample containing more than 80,000 extragalactic sources, and performed SED fitting for AGN/SFG separation. Our sample have the continuous 9 bands photometry of AKARI, as well as 9 more bands from the WISE and Spitzer where available. This is the largest statistical test using extensive mid-IR sample. By using the SED fitting technique, we investigate the evolution of AGN fraction as a function of redshift and IR luminosity in an extinction-free way. Our analysis shows that AGN fraction does not seem to have strong redshift dependent. Instead, AGN fraction increases where luminosity is larger for the sources through all the redshift ranges .