Astronomers discover unusual debris rings around white dwarf J1328−1450

Astronomers using the European Southern Observatory’s Very Large Telescope have identified an unusual debris structure around the white dwarf J1328−1450, located approximately 1,600 light-years from Earth. Unlike typical single debris disks, this system features two distinct rings of gas separated by a gap. The gas contains rocky elements such as calcium, oxygen, magnesium, and iron.

Researchers suggest the rings may originate from material sourced from different regions of an ancient planetary system, or from different layers, such as the crust and interior, of a single disrupted body. The gap between the rings might be maintained by surviving planetary objects, ranging in size from a few kilometers to roughly the size of Pluto.

This discovery provides insight into the eventual fate of solar systems. As stars like the Sun exhaust their fuel, they expand into red giants and eventually leave behind white dwarfs. The resulting gravitational forces can destroy planets and leave rocky remnants to form debris disks. Additionally, new research indicates that asteroids surviving these gravitational forces may break into large chunks, between 0.1 and 1 kilometer across, rather than immediately turning into fine dust, creating a kilometer-size barrier in the debris formation process.