The spectral energy distributions of different types of Seyfert galaxies

We calculated the average spectral energy distributions (SEDs) for Seyfert 1 galaxies (S1s) and two types of Seyfert 2 galaxies (S2s with or without polarized broad-line regions, i.e. HBLRs and Non-HBLRs). We found that compared with other Seyfet galaxies, the Non-HBLRs show an extremely brighter feature towards the far infrared band, which is believed to be affected by the circumnuclear starburst components. The energy in this band seems to dominate their bolometric luminosities. A weaker hard X-ray emission was also found in these Non-HBLRs, which is believed to be the indicator of a weaker nuclear power. So in the case of Non-HBLRs, any use of bolometric luminosities to represent the active galactic nuclei (AGN) power is possibly misleading.