| 其他摘要 | In this thesis, the basic properties, the observation of multi-band radiation and the relevant theories for AGN have been reviewed. Some problems to be discussed have been pointed out, among which a few of specific ones, related to the variability timescale, the central structure, the some characteristics for multi-band spectral energy distribution and evolution of AGN, have been investigated and are summarized as follows. (1)Using a new composite color-color ( - ) diagram, where is a new composite spectral indies which was introduced by us and by Sambura et al.(1996), we investigated the nature of the HBLs-LBLs relationship, and the BL Lacs-FSRQs relationship, in high-energy emission. The results show that the optical¬—X-ray—γ-ray spectral energy distributions of three subclasses of GeV γ-ray loud blazers are different, but essentially continuous：HBLs and FSRQs occupy separated regions while LBLs bridge the gap between HBLs and FSRQs. And the possible interpretation has been proposed to the results. (2)Based on the 42 samples and 77 samples, evolutionary sequence of the blazars has been studied with the correlations in intrinsic bolometric luminosity and parameter Δ (Punsly 1996) and the color-color (U-B vs. B-V) diagram which is originally for the stellar evolutionary sequence, respectively. The results show that the evolutionary track of blazers is from FSRQs to BL Lac objects, that is, all FSRQs and BL Lac objects are considered to be in the same family. But FSRQs have high luminosity and larger accretion rates, that is, FSRQs occur in the earlier, violent phase of the blazar evolutionary sequence, while BL Lac objects have low luminosity and smaller accretion rates, that is, they occur in the later phase of the galactic evolutionary sequence. (3)Based on a sample of 16 flat spectra radio quasars, 8 BL Lac objects and 15 FRI and FRII radio galaxies, for which the broad-line luminosities are available, the correlation between the the broad-line luminosity and the intrinsic Eddington ratio is shown for FSRQs, BL Lac objects and FRI & FRII radio galaxies. This result not only provide a solid experimental basis of the theory of Czerny, Rozanska & Kuraszkiewicz（2004）which is described by ADAF principle, but also give a new evidence for that the evolutionary sequence of the elliptical galaxies is from FSRQs to BL Lac objects and FRI & FRII radio galaxies. Then, we also study the evolutionary scheme of radio-loud AGNs with the color-color (U-B vs. B-V) diagram by a sample of 31 FSRQs, 46 BL Lac objects and 22 FR radio galaxies. We find that the evolutionary track of blazars is from FSRQs to BL Lac objects and FRI & FRII(G) radio galaxies. The results found by us are consistent with the speculation of Punsly(1996). |
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