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Darkish matter might create black holes that devour planets from inside

August 25, 2025
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Darkish matter might create black holes that devour planets from inside
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New analysis means that darkish matter might collect over huge intervals of time on the coronary heart of Jupiter-sized planets, creating black holes that eat these worlds from inside. This placing idea could imply extrasolar planets, or “exoplanets,” could possibly be used to check the thriller of darkish matter.

On this new mannequin, superheavy darkish matter particles could possibly be trapped by exoplanets, dropping power and drifting towards that world’s core. As soon as there, these superheavy darkish matter particles accumulate till they collapse, forming a black gap. This black gap then ravenously eats its method out of its host planet.

This new darkish matter/black gap concept would not work with all recipes of black holes, nevertheless. As an example, if dark matter particles meet and annihilate each other as some models suggest (as happens when electrons meet their antiparticles, positrons), then it wouldn’t be possible for them to gather in quantities needed to collapse and birth a black hole.


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Dark matter is troubling to scientists because, despite the fact that it accounts for 85% of the “stuff” in the universe, we have no idea what it is. The fact that dark matter doesn’t interact with light means it can’t be made up the electrons, protons, and neutrons that form the atoms that compose everything we see around us: the universe’s ordinary matter — stars, planets, moons, living things, etc.. This lack of interaction with electromagnetic radiation also makes dark matter effectively invisible. This puzzle has led to scientists to suggest all types of different particles that might possibly account for dark matter, many of which have different properties.

But there’s another caveat to the dark matter recipe needed for this process to occur. The constituent particles would have to have very large masses. This rules out one of the most highly favored dark matter candidate particles, the axion, a hypothetical particle with a very small mass.

“If the dark matter particles are heavy enough and don’t annihilate, they may eventually collapse into a tiny black hole,” University of California, Riverside researcher Mehrdad Phoroutan Mehr said in a statement. “If the darkish matter particles are heavy sufficient and don’t annihilate, they could ultimately collapse right into a tiny black gap.”

How are darkish matter black holes born?

At the moment, the lightest black holes we’re conscious of are so-called stellar mass black holes. These are thought to have lots between round 3 and 100 instances the mass of the sun. The logic behind this is sound, as these black holes are born when massive stars run out of nuclear fuel at the end of their lives. As a supernova explosion ejects the outer layers of these stars, their stellar cores collapse.

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That means the mass range of stellar mass black holes is set by the masses of the progenitor stars that created them. Furthermore, the lower mass is set by the fact that stars with less than 1.4 times the mass of the sun (a value known as the Chandrasekhar limit) can’t go supernova, so can’t birth a black hole or a neutron star. Instead, these stars leave behind a white dwarf.

There’s another mass limit to consider, too. The Tolman–Oppenheimer–Volkoff (TOV) limit divides stellar cores that create black holes and those that birth neutron stars. Though less well defined than the Chandrasekhar limit, the TOV limit suggests that after ejecting most of its matter, a stellar core needs to have at least 2.2 to 2.9 times the mass of the sun to form a black hole.

This limit is uncertain, as currently the lightest black hole we have detected and confirmed is around 3.8 times the mass of the sun, while the heaviest neutron star ever detected weighs in at 2.4 solar masses.

a dark black orb in space and a white star with purple clouds shooting out of it

Illustrations of a black hole (left) a neutron star (right) between them lies the Tolman–Oppenheimer–Volkoff limit” (Image credit: NASA’s Goddard Space Flight Center/S. Wiessinger, ESA/Gaia/DPAC)

These planet-eating black holes would be much more diminutive than even the lightest stellar mass black hole if they adopt the mass of the planet they devour. The team proposes that this process could occur within planets with masses the same as Jupiter, which has around 0.001 times the mass of the sun.

“In gaseous exoplanets of various sizes, temperatures, and densities, black holes could form on observable timescales, potentially even generating multiple black holes in a single exoplanet’s lifetime,” Phoroutan-Mehr said. “These results show how exoplanet surveys could be used to hunt for superheavy dark matter particles, especially in regions hypothesized to be rich in dark matter like our Milky Way’s galactic center.”

Of course, other than watching a planet devoured from the inside out, the creation pathway of stellar mass black holes and the TOV limit means that detecting a black hole with a mass less than the sun could support the team’s theory.

“Discovering a black hole with the mass of a planet would be a major breakthrough,” Phoroutan-Mehr said. “If astronomers were to discover a population of planet-sized black holes, it could offer strong evidence in favor of the superheavy non-annihilating dark matter model.”

This new theory, combined with the growing catalog of exoplanets, with over 5,000 worlds beyond the solar system, means these planets can now be added to the celestial bodies that have been suggested as dark matter probes.

An example of that is the suggestion that certain dark matter candidates could become trapped in neutron stars, gathering and gradually annihilating each other thus heating these stellar remnants.

“So, if we were to observe an old and cold neutron star, it could rule out certain properties of dark matter, since dark matter is theoretically expected to heat them up,” Phoroutan-Mehr said.

Dark matter trapping within exoplanets could also cause heating within these worlds or it could cause them to emit high-energy radiation.

“Today’s instruments aren’t sensitive enough to detect these signals. Future telescopes and space missions may be able to pick them up,” Phoroutan-Mehr concluded. “As we continue to collect more data and examine individual planets in more detail, exoplanets may offer crucial insights into the nature of dark matter.”

The team’s research was published on Wednesday (Aug. 20) in the journal Physical Review D.



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