MG14 - Talk detail |
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Participant |
Schee, Jan | |||||||
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Institution |
Silesian university in Opava - Bezrucovo nam. 13 - Opava - - Czech Republic | |||||||
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Session |
PT6 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
Ghost Images in Bardeen and ABG spacetimes | |||||
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Abstract |
In this contribution we present our study of bending of null geodesics in the regular spacetimes, particularly in Bardeen and Ayon-Beato-Garcia (ABG) no-horizon spacetimes. We show that thanks to "flatness" of these spacetimes in the central region there exist interesting optical phenomena related to photons traveling through such gravitational field with small impact parameters. There exist a critical impact parameter which gives maximal deflection of light in Bardeen no-horizon spacetimes. We discuss "ghost" direct and indirect images of Keplerian discs which are generated by photons with small impact parameters. |
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Pdf file |
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Session |
AC1 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
The Imprints of Ghost Images in Astrophysical Phenomena | |||||
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Abstract |
In the case of no-horizon regular spacetimes there exist a region close to origin where the spacetime is "flattened". The existence of such region leads to presence of phenomena we call "ghost" images where additional image in direct images of projected, radiating objects show up. We show how the presence of ghost images influence the distribution of photons in pro files of spectral lines generated by Keplerian disks. |
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Pdf file |
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