Press release no.
The narrow width of the HR 4796A ring implies that it also is held in place by unseen bodies, most probably planets or protoplanets. It is especially interesting this stellar ring is so young, indicating planetary bodies have already formed in less than 10 million years. For comparison, the ring width is approximately equal to the distance separating the orbits of Mars and Uranus in our own solar system. All dust rings, whether around stars or planets, can only stay intact by some mechanism confining the dust. Otherwise, disruptive forces, such as those produced by particle collisions, light pressure, etc., would cause the ring to spread both inward and outward until it finally lost its identity.