EXTREMAL ENERGY SHIFTS OF RADIATION FROM A RING NEAR A ROTATING BLACK HOLE
- 29 November 2010
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 725 (2), 1507-1515
- https://doi.org/10.1088/0004-637x/725/2/1507
Abstract
Radiation from a narrow circular ring shows a characteristic double-horn profile dominated by photons having energy around the maximum or minimum of the allowed range, i.e. near the extremal values of the energy shift. The energy span of a spectral line is a function of the ring radius, black hole spin, and observer's view angle. We describe a useful approach to calculate the extremal energy shifts in the regime of strong gravity. Then we consider an accretion disk consisting of a number of separate nested annuli in the equatorial plane of Kerr black hole, above the innermost stable circular orbit (ISCO). We suggest that the radial structure of the disk emission could be reconstructed using the extremal energy shifts of the individual rings deduced from the broad wings of a relativistic spectral line.Keywords
This publication has 33 references indexed in Scilit:
- Probing variability patterns of the Fe K line complex in bright nearby AGNsAstronomy & Astrophysics, 2009
- Where is the radiation edge in magnetized black hole accretion discs?Monthly Notices of the Royal Astronomical Society, 2008
- Plasma Disks and Rings with “High” Magnetic Energy DensitiesThe Astrophysical Journal, 2006
- Iron line profiles in strong gravityMonthly Notices of the Royal Astronomical Society, 2004
- The structure and radiation spectra of illuminated accretion disks in AGNAstronomy & Astrophysics, 2004
- On the radial dependence of the disk FeKα line emissivity in active galactic nucleiNew Astronomy, 2000
- Line emission from accretion discs around black holes: the analytic approachNew Astronomy, 1998
- The Optical Appearance of a Star Orbiting an Extreme Kerr Black HoleThe Astrophysical Journal, 1973
- Handbook of Elliptic Integrals for Engineers and ScientistsPublished by Springer Science and Business Media LLC ,1971
- Global Structure of the Kerr Family of Gravitational FieldsPhysical Review B, 1968