A further argument for the iron lines in active galactic nuclei arising from cerenkov line-like radiation — Calculation for an optically thin case |
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| Institution: | 1. Department of Biochemistry, Royal Lancaster Infirmary & Furness General Hospital, University Hospitals of Morecambe Bay NHS Foundation Trust, Lancaster, United Kingdom;2. Lancaster Medical School, University of Lancaster, Lancaster, United Kingdom;3. Institute of Cardiovascular and Medical Sciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, United Kingdom;4. British Heart Foundation Centre for Cardiovascular Science, University of Edinburgh, United Kingdom;1. Department of Molecular Microbiology, Oslo University Hospital, Oslo, Norway;2. Department of Oncology, The Affiliated Hospital of Binzhou Medical College, Binzhou, PR China;3. Department of Oncology, Binzhou People''s Hospital, Binzhou, PR China;4. Department of Gastroenterology, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Nanning, PR China |
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| Abstract: | Confronted by observations, the difficulties to explain the formation of the iron Kα lines in active galactic nuclei (AGNs) in the context of the current “reflection disk-photoelectric absorption-fluorescence line” model are discussed in detail, and it is further pointed out that a newly recognized line emission mechanism — the Cerenkov line-like radiation could be the dominant mechanism to produce the AGN iron Kα line. The negative effect of the hydrogen plasma on the refractive index is proved to be negligible. The Cerenkov iron Kα line emission is calculated for the optically thin case and compared with the observations. The reasonableness of this new mechanism is verified, thus providing a new scenario for the physical situation around a black hole. |
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