Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004acasn..45..347c&link_type=abstract
Acta Astronomica Sinica, vol. 45, no. 4, p. 347-355
Astronomy and Astrophysics
Astronomy
Line: Formation, Radiation Mechanism: Non-Thermal, Galaxies: Nuclei, X-Rays: Galaxies
Scientific paper
The difficulties encountered by the traditional "reflection disk-photoelectric absorption-fluorescence emission" model of iron K? line in active galactic nuclei (AGNs) are discussed in detail. Confronting the observations, it is further pointed out that a newly recognized line emitting mechanism- the Cerenkov line-like radiation could be the dominant mechanism to produce the AGN iron K? line. The negative impact of Hydrogen in the plasma to the refractive index is proved to be negligible. The Cerenkov iron K? line luminosity is calculated and compared with the observation. The rationality of the new mechanism is verified, and a new scenario of physical situation proximate to the black hole is provided.
Chen Leon L.
Liu Dang-Bo
You Jae Ho
Yuan Ai-Fang
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