What is the ring of light in the black hole image?
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The ring of light in the black hole image is known as the photon ring. It is a stack of lensed rings that carry information about the underlying spacetime geometry . The photon ring is theorized to be observable in upcoming space-based VLBI missions . It is dominated by a thin ring and its shape and size can be affected by the black hole's spin . The first photon ring, which is the most easily accessible, has a larger width-to-diameter ratio and lacks a sharply defined diameter . However, it does have a precise angle-dependent diameter in visibility space, which can be measured for most astrophysical profiles . Observations of the photon ring can provide valuable information for precision tests of strong-field general relativity .
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| The paper discusses the theoretical prediction of "photon rings" in black hole images, which are lensed rings of light that carry information about the underlying spacetime geometry. | |
22 May 2023 | The paper discusses the theoretical prediction of "photon rings" in black hole images, which are lensed rings of light that carry information about the underlying spacetime geometry. |
1 Citations | The ring of light in the black hole image is the dominant feature in the image. It is formed by optically thin, luminous cones of emission, representing jet walls, and its position is affected by the black hole's spin. |
| The paper does not explicitly mention what the ring of light in the black hole image represents. | |
3 Citations | The paper discusses the photon ring, which is a self-similar structure of light around a black hole. It is part of the black hole hologram and can be imaged by upcoming space-based VLBI missions. |
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