Observational signatures of rotating black holes in the semiclassical gravity with trace anomaly
Fuente:
arXiv
Salvato in:
| Autori principali: | , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2023
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866914716335472640 |
|---|---|
| author | Zhang, Zhenyu Hou, Yehui Guo, Minyong |
| author_facet | Zhang, Zhenyu Hou, Yehui Guo, Minyong |
| contents | In a recent work by Fernandes [arXiv:2305.10382], an exact stationary and axisymmetric solution was discovered in semiclassical gravity with type-A trace anomaly, identified as a quantum-corrected version of the Kerr black hole. In this study, we explore the observational signatures of this black hole solution. Our investigation reveals that there exist prograde and retrograde light rings, whose radii increase monotonically with the coupling parameter $α$. We also observe that when $α$ is negative, the shadow area for the quantum-corrected black hole is smaller than that of the Kerr black hole, whereas when $α$ is positive, the area is larger. Furthermore, for a near-extremal black hole, its high-spin feature (the NHEKline) is found to be highly susceptible to disruption by $α$. Moreover, we discuss the images of the quantum-corrected black hole in the presence of a thin accretion disk and compare them to those of the Kerr black hole. Our study highlights the importance of near-horizon emission sources in detecting the effects of quantum corrections by black hole images. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_14924 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Observational signatures of rotating black holes in the semiclassical gravity with trace anomaly Zhang, Zhenyu Hou, Yehui Guo, Minyong General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena In a recent work by Fernandes [arXiv:2305.10382], an exact stationary and axisymmetric solution was discovered in semiclassical gravity with type-A trace anomaly, identified as a quantum-corrected version of the Kerr black hole. In this study, we explore the observational signatures of this black hole solution. Our investigation reveals that there exist prograde and retrograde light rings, whose radii increase monotonically with the coupling parameter $α$. We also observe that when $α$ is negative, the shadow area for the quantum-corrected black hole is smaller than that of the Kerr black hole, whereas when $α$ is positive, the area is larger. Furthermore, for a near-extremal black hole, its high-spin feature (the NHEKline) is found to be highly susceptible to disruption by $α$. Moreover, we discuss the images of the quantum-corrected black hole in the presence of a thin accretion disk and compare them to those of the Kerr black hole. Our study highlights the importance of near-horizon emission sources in detecting the effects of quantum corrections by black hole images. |
| title | Observational signatures of rotating black holes in the semiclassical gravity with trace anomaly |
| topic | General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2305.14924 |