NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-23 T05:31:29 PDT
Help | Comment | NED Home

For refcode 2005A&A...441..855P:
Retrieve 5 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2005A&A...441..855P The relativistic shift of narrow spectral features from black-hole accretion discs T. Pechacek, M. Dovciak, V. Karas and G. Matt Received 17 May 2005 / Accepted 14 June 2005 Transient spectral features have been discovered inthe X-ray spectra of Active Galactic Nuclei, mostly in the 5-7 keV energy range. Several interpretations were proposed for the origin of these features. We examined a model of Doppler boosted blue horns of the iron line originating from a spot in a black hole accretion disc, taking into account different approximations of general relativistic light rays and the resulting shift of energy of photons. We provide a practical formula for the blue horn energy of an intrinsically narrow line and assess its accuracy by comparing the approximation against an exact value, predicted under the assumption of a planar accretion disc. The most accurate approximation provides excellent agreement with the spot orbital radius down to the marginally stable orbit of anon-rotating black hole. Keywords: line: profiles, accretion, accretion discs, black hole physics, X-rays: galaxies
Retrieve 5 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home