Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion
Abstract In this paper, under the illumination of thin disk accretion, we have employed the ray-tracing method to carefully investigate shadows and rings of the Kehagias-Sfetsos(KS) black hole in deformed Hořava-Lifshitz(HL) gravity. The results show that the event horizon r + , the radius r_p and i...
Published in: | Journal of Cosmology and Astroparticle Physics |
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crioppubl:10.1088/1475-7516/2021/06/037 2024-09-15T18:24:57+00:00 Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion Li, Guo-Ping He, Ke-Jian 2021 http://dx.doi.org/10.1088/1475-7516/2021/06/037 https://iopscience.iop.org/article/10.1088/1475-7516/2021/06/037 https://iopscience.iop.org/article/10.1088/1475-7516/2021/06/037/pdf unknown IOP Publishing https://iopscience.iop.org/page/copyright https://iopscience.iop.org/info/page/text-and-data-mining Journal of Cosmology and Astroparticle Physics volume 2021, issue 06, page 037 ISSN 1475-7516 journal-article 2021 crioppubl https://doi.org/10.1088/1475-7516/2021/06/037 2024-09-02T04:14:17Z Abstract In this paper, under the illumination of thin disk accretion, we have employed the ray-tracing method to carefully investigate shadows and rings of the Kehagias-Sfetsos(KS) black hole in deformed Hořava-Lifshitz(HL) gravity. The results show that the event horizon r + , the radius r_p and impact parameter b p of photon sphere are all decreased with the increase of the HL parameter ω, but the effective potential increases. And, it also turns out that the trajectories of light rays emitted from the north pole direction are defined as the direct emission, lensing ring and photon ring of KS black hole, on the basis of orbits n = ϕ/2π. As black hole surrounded by thin disk accretion, we show that the corresponding transfer functions have their values increased with the parameter ω. More importantly, we also find that the direct emissions always dominate the total observed intensity, while lensing rings as a thin ring make a very small contribution and photon ring as a extremely narrow ring make a negligible contribution, for all three toy-model functions. In view of this, the results finally imply that shadows and rings as the observational appearance of KS black hole exhibit some obvious interesting features, which might be regarded as an effective way to distinguish black holes in HL gravity from the Schwarzschild black hole. Article in Journal/Newspaper North Pole IOP Publishing Journal of Cosmology and Astroparticle Physics 2021 06 037 |
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Abstract In this paper, under the illumination of thin disk accretion, we have employed the ray-tracing method to carefully investigate shadows and rings of the Kehagias-Sfetsos(KS) black hole in deformed Hořava-Lifshitz(HL) gravity. The results show that the event horizon r + , the radius r_p and impact parameter b p of photon sphere are all decreased with the increase of the HL parameter ω, but the effective potential increases. And, it also turns out that the trajectories of light rays emitted from the north pole direction are defined as the direct emission, lensing ring and photon ring of KS black hole, on the basis of orbits n = ϕ/2π. As black hole surrounded by thin disk accretion, we show that the corresponding transfer functions have their values increased with the parameter ω. More importantly, we also find that the direct emissions always dominate the total observed intensity, while lensing rings as a thin ring make a very small contribution and photon ring as a extremely narrow ring make a negligible contribution, for all three toy-model functions. In view of this, the results finally imply that shadows and rings as the observational appearance of KS black hole exhibit some obvious interesting features, which might be regarded as an effective way to distinguish black holes in HL gravity from the Schwarzschild black hole. |
format |
Article in Journal/Newspaper |
author |
Li, Guo-Ping He, Ke-Jian |
spellingShingle |
Li, Guo-Ping He, Ke-Jian Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
author_facet |
Li, Guo-Ping He, Ke-Jian |
author_sort |
Li, Guo-Ping |
title |
Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
title_short |
Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
title_full |
Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
title_fullStr |
Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
title_full_unstemmed |
Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin disk accretion |
title_sort |
shadows and rings of the kehagias-sfetsos black hole surrounded by thin disk accretion |
publisher |
IOP Publishing |
publishDate |
2021 |
url |
http://dx.doi.org/10.1088/1475-7516/2021/06/037 https://iopscience.iop.org/article/10.1088/1475-7516/2021/06/037 https://iopscience.iop.org/article/10.1088/1475-7516/2021/06/037/pdf |
genre |
North Pole |
genre_facet |
North Pole |
op_source |
Journal of Cosmology and Astroparticle Physics volume 2021, issue 06, page 037 ISSN 1475-7516 |
op_rights |
https://iopscience.iop.org/page/copyright https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1475-7516/2021/06/037 |
container_title |
Journal of Cosmology and Astroparticle Physics |
container_volume |
2021 |
container_issue |
06 |
container_start_page |
037 |
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1810465352188952576 |