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- W3100534120 abstract "In this paper, the shadows cast by Einstein-Maxwell-Dilaton-Axion black hole and naked singularity are studied. The shadow of a rotating black hole is found to be a dark zone covered by a deformed circle. For a fixed value of the spin $a$, the size of the shadow decreases with the dilaton parameter $b$. The distortion of the shadow monotonically increases with $b$ and takes its maximal when the black hole approaches to the extremal case. Due to the optical properties, the area of the black hole shadow is supposed to equal to the high-energy absorption cross section. Based on this assumption, the energy emission rate is investigated. For a naked singularity, the shadow has a dark arc and a dark spot or straight, and the corresponding observables are obtained. These results show that there is a significant effect of the spin $a$ and dilaton parameter $b$ on these shadows. Moreover, we examine the observables of the shadow cast by the supermassive black hole at the center of the Milky Way, which is very useful for us to probe the nature of the black hole through the astronomical observations in the near future." @default.
- W3100534120 created "2020-11-23" @default.
- W3100534120 creator A5012340027 @default.
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- W3100534120 date "2013-11-29" @default.
- W3100534120 modified "2023-10-18" @default.
- W3100534120 title "Observing the shadow of Einstein-Maxwell-Dilaton-Axion black hole" @default.
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- W3100534120 doi "https://doi.org/10.1088/1475-7516/2013/11/063" @default.
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