期刊
ASTROPHYSICAL JOURNAL
卷 696, 期 2, 页码 1616-1629出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/696/2/1616
关键词
accretion, accretion disks; black hole physics; radiative transfer; relativity
资金
- NASA [05-ATP05-96, NNX08AX59H]
- NSF [PHY05-51164]
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0807385] Funding Source: National Science Foundation
- NASA [93580, NNX08AX59H] Funding Source: Federal RePORTER
Relativistic radiative transfer problems require the calculation of photon trajectories in curved spacetime. We present a novel technique for rapid and accurate calculation of null geodesics in the Kerr metric. The equations of motion from the Hamilton-Jacobi equation are reduced directly to Carlson's elliptic integrals, simplifying algebraic manipulations and allowing all coordinates to be computed semianalytically for the first time. We discuss the method, its implementation in a freely available FORTRAN code, and its application to toy problems from the literature.
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