The Calculation of the Ratios of Intensities and the Intrinsic Redshifts of Cerenkov Iron Kα and Kβ Lines and Its Possible Application in the Researches Towards Active galactic Nuclei

We mentioned that,when the thermal relativistic electrons with isotropic distribution of velocities move through a dense gas region,or impinge upon the surface of a cloud of dense gas,the Cerenkov effect will produce peculiar atomic or ionic emission lines, which we call the‘Cerenkov line-like radiation’.This prediction has been verified by the laboratory experiments in the optical waveband.In this paper,we present the basic for- mula for calculating the intensity ratio and the intrinsic redshift ratio of the Cerenkov iron Ka and Kβlines.Using these formulae,we calculate the intensity ratios and the redshift ratios of the Cerenkov iron Ka and Kβlines for different valences of iron ions,which can be examined by the observations of AGNs.The recent observations show that,except for the iron Kαline at～6.4 keV,there is also an apparent iron Kβline at～7.0 keV in NGC 3783 with intensity markedly higher than the predicted one by the traditional fluorescence emission.We argue that,the Cerenkov line-like radiation can provide a way to solve the puzzle of the observed anomalous ratio of the equivalent widths EW_(Kα)/EW_(Kβ)≈3.43, which is difficult to understand from the conventional‘photoelectric absorption-fluorescence emission’mechanism.Besides,we expected that the intrinsic redshift ratio of the Cerenkov iron Kαand Kβlines could be verified in future observations.If our suggestion is further supported by observations,the conventional scenario around the central super massive black hole of AGNs would need to be modified to accommodate more energetic,more violent and much denser environment than previously thought.