White Dwarf J1328−1450 May Offer Peek Into Solar System’s Future

J1328−1450 White Dwarf Debris Disc

Billions of years from now, the sun will run out of fuel and swell into a red giant, according to a Kids News report.

The Tech TL;DR:

• Researchers using the European Southern Observatory’s Very Large Telescope discovered a white dwarf designated J1328−1450 featuring an unusual double ring of planetary debris.
• Located 1,600 light-years away in the constellation Virgo, the star possesses 47 percent of the sun’s mass compressed into an Earth-sized diameter.
• Scientists say this configuration may offer a peek into one possible outcome for our solar system in the distant future.

Astronomers analyzed the remnant core located roughly 1,600 light-years from Earth in the constellation Virgo, Kids News reported. Prior observations of 21 similar white dwarfs revealed only single debris discs surrounding the dense stellar cores.

Two Rings Orbiting J1328−1450

The newly identified debris disc around J1328−1450 breaks established patterns by splitting into two distinct concentric rings. Researchers suggest that two rocky bodies managed to survive the star’s red giant phase while embedded within the dust and gas.

“It shows that the remnants of a planetary system can have a much more complex structure than we previously thought, and provides further support to the idea that planetary rocky bodies may survive the transformation of a star into a white dwarf,” said Dr Felipe Lagos-Vilches of Universidad Técnica Federico Santa María in Chile, an author of the study published in Nature Astronomy.

The parent star may have hosted a planetary system before expanding into a red giant and engulfing some of its innermost planets. Surviving rocky bodies with more distant orbits may later have been gravitationally perturbed onto highly eccentric paths that brought them close to the white dwarf.

Magnesium Depletion in Rings

The two surviving bodies likely match the scale of Pluto and smaller rocky fragments. Their close passage triggered gravitational disruption, scattering their material into distinct bands.

“The outer ring is strongly depleted in magnesium compared with the inner ring,” Dr Lagos-Vilches said, according to Kids News. This suggests the material may have originated from different parent bodies or different layers of a rocky body disrupted when it went too close to the white dwarf.

In about five billion years, the sun will become a red giant. Scientists debate whether our planet will also meet this fate, though the expanding sun is bound to swallow Mercury and Venus.

Jupiter, Saturn and the more distant bodies should have a much better chance of surviving. Gravitational forces could eventually pull surviving asteroids, moons, and planetary leftovers close enough to be shredded apart once the sun transitions into a white dwarf.