PT2 - Theory of light propagation in gravitation fields |
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Speaker |
Younsi, Ziri |
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Coauthors |
Grenzebach, Arne |
| Talk Title |
Electromagnetic and Observational Signatures of the Kerr-Taub-NUT Spacetime |
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Abstract |
While it is expected that the Galactic centre supermassive black hole Sgr A* is well described by the Kerr solution, general relativity (GR) has yet to be tested rigorously in the strong-field regime. It is eminently possible that alternative spacetimes, and even alternative theories of gravity may describe the black hole candidate in our Galactic centre. To this end, in this talk we investigate the possibility of distinguishing a black hole in the Kerr-Taub-NUT spacetime from the standard Kerr solution. Coupling ray-tracing calculations with a fully covariant GR radiative transport formalism we simulate the observed electromagnetic emissions and images from the vicinity of both the Kerr-Taub-NUT and Kerr spacetimes. Comparing these calculations qualitatively we discuss the prospect of current and future instruments in probing these differences. |
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Talk view |
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