Black Hole Shadow Drift and Photon Ring Frequency Drift

@article{Frion2021BlackHS,
  title={Black Hole Shadow Drift and Photon Ring Frequency Drift},
  author={Emmanuel Frion and Leonardo Giani and Tays Miranda},
  journal={The Open Journal of Astrophysics},
  year={2021}
}
The apparent angular size of the shadow of a black hole in an expanding Universe is redshift-dependent. Since cosmological redshifts change with time known as the redshift drift all redshift-dependent quantities acquire a time dependence, and a fortiori so do black hole shadows. We find a mathematical description of the black hole shadow drift and show that the amplitude of this effect is of order 10−16 per day for M87. While this effect is small, we argue that its non-detection can be used to… Expand
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Shadow and Photon Sphere of Black Hole in Clouds of Strings and Quintessence
  • Aoyun He, Jun Tao, Yadong Xue, Lingkai Zhang
  • Physics
  • 2021
Aoyun He,∗ Jun Tao,† Yadong Xue,‡ and Lingkai Zhang§ Center for Theoretical Physics, College of Physics, Sichuan University, Chengdu, 610065, China Abstract In this work, we study the shadow andExpand

References

SHOWING 1-10 OF 73 REFERENCES
Cosmic dynamics in the era of Extremely Large Telescopes
The redshifts of all cosmologically distant sources are expected to experience a small, systematic drift as a function of time due to the evolution of the Universe's expansion rate. A measurement ofExpand
First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole
When surrounded by a transparent emission region, black holes are expected to reveal a dark shadow caused by gravitational light bending and photon capture at the event horizon. To image and studyExpand
Definitive test of the Rh = ct universe using redshift drift
The redshift drift of objects moving in the Hubble flow has been proposed as a powerful model-independent probe of the underlying cosmology. A measurement of the first and second order redshiftExpand
Direct detection of the cosmic expansion: the redshift drift and the flux drift
The redshift drift, the change of cosmological redshift with time, is a direct consequence of the expansion of the Universe. Thus the measurement of the cosmological redshift drift will offer aExpand
Shadow of a spinning black hole in an expanding universe
We study the influence of the cosmic expansion on the size of the shadow of a spinning black hole observed by a comoving observer. We first consider that the expansion is driven by a cosmologicalExpand
Constraining the evolutionary history of Newton's constant with gravitational wave observations
Space-borne gravitational wave detectors, such as the proposed Laser Interferometer Space Antenna, are expected to observe black hole coalescences to high redshift and with large signal-to-noiseExpand
Black holes as particle detectors: evolution of superradiant instabilities
Superradiant instabilities of spinning black holes can be used to impose strong constraints on ultralight bosons, thus turning black holes into effective particle detectors. However, very little isExpand
Shadow of a black hole at cosmological distances
Cosmic expansion is expected to influence on the size of black hole shadow observed by comoving observer. Except the simplest case of Schwarzschild black hole in de Sitter universe, analyticalExpand
A new cosmological probe using super-massive black hole shadows
In this paper, we study the prospect for using the low-redshift and high-redshift black hole shadows as a new cosmological standard ruler to measure the cosmological parameters. We show that, usingExpand
Black hole shadow as a standard ruler in cosmology
Advancements in the black hole shadow observations may allow us not only to investigate physics in the strong gravity regime, but also to use them in cosmological studies. In this paper, we proposeExpand
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