Abstract
The current paradigm of high energy spectroscopy tells us that light emitted from a wide variety of objects has its origin close to the black hole event horizon. As such, these photons are subject to general relativistic effects such as light-bending, gravitational lensing and redshift, time-dilation, etc. These gravitational effects are well-understood from a theoretical standpoint and therefore, provide a natural mechanism to test the properties of strong gravitational fields. To this end, we have developed a new (semi-analytic) strong gravity code, capable of describing the contribution of photons that perform multiple orbits of the hole. We apply this code to a simple Keplerian accretion disk in order to understand the role played by the angular emissivity, black hole spin and higher order images in forming the line profile.
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Beckwith, K., Done, C. (2005). Observational effects of strong gravity. In: Maccarone, T.J., Fender, R.P., Ho, L.C. (eds) Astrophysics and Space Science. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4085-7_11
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DOI: https://doi.org/10.1007/1-4020-4085-7_11
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