Timeline for Why is the ring of light around the M87 black hole bigger than the photon sphere?
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 12, 2019 at 16:42 | comment | added | ProfRob | The ring is seen at a radius of $\sqrt{27} GM/c^2$ for precise geometric reasons. | |
| Apr 12, 2019 at 15:21 | comment | added | Steve Linton | The thing I think is at 5 ish radii is the point at which the accretion disk becomes unstable. This is, I think further out than the innermost stable orbit, because the disk is hot and turbulent. | |
| Apr 12, 2019 at 14:58 | comment | added | ProfRob | The figure of $5r_s$ is wrong - it is $2.6r_s$ (unless you were referring to a diameter). But the OP knows this; they want to know why? | |
| Apr 12, 2019 at 14:44 | history | answered | Steve Linton | CC BY-SA 4.0 |