Multi-method Study on Radius of Radiation Zone of AGN Accretion Disk

We analyzed the radius of the radiation area of AGN accretion disk by standard α disk method, short time optical variation method, continuum reverberation lag method and gravitational microlensing method. The results show that:(1) there is no significant difference in the M_BH, the luminosity or the radius of the radiation area of the accretion disk between the blazars and the quasars. This paper selects the high luminosity source for research, so there is no obvious difference among parameters of the subcategory; (2) The radius ratio of the radiation area of AGN accretion disk obtained by the short time optical variability has no dependence on the M_BH; (3) The radius ratio of radiation area of AGN accretion disk obtained by the continuous reverberation lag method is more dependent on the black hole than that obtained by standard α disk model method. For the source that cannot determine the M_BH, the radius of radiation area of AGN accretion disk can be obtained by the continuous reverberation lag method; (4) There is no obvious correlation between the radius of radiation area of AGN accretion disk by the gravitational microlensing method and the M_BH, and the method is only applicable to quasars with micro-gravitational lens effects; (5) These methods prove that the radius of the radiation area of AGN accretion disk is directly proportional to the mass of the black hole, which verifies that the standard model is established. It provides theoretical guidance for further exploration of the sources needed for these four methods, which is of significant value for the study on the radius of the radiation area of AGN accretion disk.