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Title:
Iron Kα Line Simulations for Black Holes: The Simplest Model
Authors:
Zakharov, Alexander F.
Affiliation:
National Astronomical Observatories of Chinese Academy of Sciences, Beijing 100012, China Institute of Theoretical and Experimental Physics, Moscow, 117259, RussiaCenter of Advanced Mathematics and Physics, National University of Sciences and Technology, Rawalpindi, PakistanBogoliubov Laboratory for Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Russia
Publication:
SPECTRAL LINE SHAPES IN ASTROPHYSICS: VI Serbian Conference on Spectral Line Shapes in Astrophysics (VI SCSLSA). AIP Conference Proceedings, Volume 938, pp. 51-58 (2007). (AIPC Homepage)
Publication Date:
09/2007
Origin:
AIP
Keywords:
black holes, X-ray astronomy, spectral line breadth, iron
Abstract Copyright:
(c) 2007: American Institute of Physics
DOI:
10.1063/1.2800152
Bibliographic Code:
2007AIPC..938...51Z

Abstract

About forty years ago it was predicted that black holes can be detected as sources of X-ray radiation. Later distortions of spectral lines (Fe Kα-line, in particular) for X-ray radiation emitted from innermost parts of accretion disks were studied. In 1995 these features of Fe Kα line were discovered with the Japanese ASCA satellite in MCG 6-30-15. Other X-ray missions such as RXTE, XMM-Newton, Chandra etc. re-discovered features of Fe Kα lines and other X-ray lines as well. Attempts to fit spectral line shapes lead to conclusions that sometimes the profiles should correspond to radiating regions which are located in the innermost parts of accretion disks where contributions of general relativistic phenomena are extremely important. As an illustration we consider a radiating annulus model to clarify claims about different spectral line profiles. We discuss properties of highly inclined disks and analyze a possibility to evaluate magnetic fields near black hole horizons.
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