GoKawiilAstronomers confirm M87* black hole shadow with new interferometric measurement
Researchers analyzed Event Horizon Telescope data from M87* collected in 2017, 2018 and 2021 using an independent interferometric observable to verify the black hole's shadow. The dataset included observations from multiple ground facilities across years, including new participants like the Greenland Telescope, Kitt Peak, and NOEMA, which improved coverage of the radio signal across the sky.
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Confirming the shadow with an independent method strengthens confidence that the original 2019 EHT image reflects a real physical feature rather than an artifact of image reconstruction techniques. This could reinforce the case that observations of M87* are consistent with general relativity's predictions for black holes, according to the researchers' approach of cross-validating multiple years and facilities.
- Multi-year EHT data (2017, 2018, 2021) was used to independently verify M87*'s black hole shadow
- New telescopes like Greenland, Kitt Peak and NOEMA improved sky coverage for later observations
- The confirmation relies on an interferometric observable distinct from the original image-based detection
Source: nature.com — Lai, 2026-11-11
Published there as: “Independent interferometric observable confirms black hole shadow in M87*”
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