A second epoch shows the ring persists and the bright spot moves

Assembled from 44 blocks · 1 evidence · 32 related

1. Story
2. Analysis of the 2018 observing campaign produced a second image of M87*, published in 2024. The ring diameter was consistent with the 2017 result, as the geometry requires, since the shadow size is fixed by mass and distance. The position of maximum brightness around the ring had shifted, which the accretion flow permits and the geometry does not constrain. The pair of epochs is the cleanest available demonstration that the dark centre is a stable structural feature rather than an imaging artefact of one week of data.
3. Knowledge
4. The photon sphere and the shadow
5. Accretion disc
6. M87* - the supermassive black hole in Messier 87
7. Event Horizon Telescope
8. A second epoch shows the ring persists and the bright spot moves
9. Connections
10. M87* - the supermassive black hole in Messier 87
11. Event Horizon Telescope
12. The photon sphere and the shadow
13. Accretion disc
14. Relativistic jet
15. Sagittarius A* - the black hole at the centre of the Milky Way
16. Heber Curtis records a curious straight ray in Messier 87
17. A mechanism for extracting energy from a spinning black hole
18. The Event Horizon Telescope observes M87* and Sagittarius A*
19. The first image of a black hole shadow is published
20. The M87* ring is imaged in polarised light
21. A second epoch shows the ring persists and the bright spot moves
22. The Event Horizon Telescope observes M87* and Sagittarius A*
23. Very long baseline interferometry
24. Atacama Large Millimeter/submillimeter Array
25. South Pole Telescope
26. The Event Horizon Telescope observes M87* and Sagittarius A*
27. The first image of a black hole shadow is published
28. The M87* ring is imaged in polarised light
29. The black hole at the centre of our own galaxy is imaged
30. A second epoch shows the ring persists and the bright spot moves
31. Schwarzschild radius
32. The first image of a black hole shadow is published
33. The black hole at the centre of our own galaxy is imaged
34. A second epoch shows the ring persists and the bright spot moves
35. Innermost stable circular orbit
36. Relativistic jet
37. Cygnus X-1
38. Cygnus X-1 is localised and weighed
39. Bekenstein assigns entropy to a black hole
40. The first image of a black hole shadow is published
41. The M87* ring is imaged in polarised light
42. A second epoch shows the ring persists and the bright spot moves
43. Evidence
44. Reports the first image of a black hole shadow, an asymmetric ring about 42 microarcseconds across, together with the array, observing campaign and imaging methodology. V55 VERIFICATION BASIS: not consulted in session; WebFetch to iopscience.iop.org and eventhorizontelescope.org was refused by the egress proxy and no search could be issued. Volume and article number are from recall of a canonical citation.