The Event Horizon Telescope's famous image of Sagittarius A* may depict an artifact, raising questions about the black hole's true structure.
The original image of Sagittarius A* was constructed from data taken by the Event Horizon Telescope Collaboration, which revealed the picture to the public in May 2022. It showed our galaxy’s central black hole as an ominous black cloud surrounded by a ring of light—the hole’s accretion disk. In its paper, the recent team suggests that the the object is more likely to have an elongated disk.
The EHT is a large radio observatory made up of a network of radio telescopes. EHT data reveal the black hole—an inherently invisible object, because light does not escape the event horizon—in its silhouette against a backdrop of its accretion disk. In its study, the team analyzed the same 2017 data on which the EHT Collaboration built its black hole image. But the team used a different method of analysis than the collaboration, indicating an elongated accretion disk compared to the doughnut structure seen in the 2022 image.The recent team contends that the black hole’s accretion disk is elongated. In other words, it has a different structure than the ring-like disk imaged in 2022.
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