Astronomers predict an invisible star -like bodies called “Dark Dwarfs” near the center of the galaxy. A new study suggests that these objects can shine thanks to the annihilation of dark matter, not to nuclear fusion. Dark Matter makes up about a quarter of the universe and interacts through gravity. If the dark matter particles similar to Wimp accumulate in a brown dwarf, they annihilated and warm, causing a weak shine. The dark dwarfs would be very clear to fuse hydrogen, but would keep the lithium-7 into its atmospheres, offering a signature. This forecast comes from a JCAP study. The discovery of someone could reveal the nature of Dark Matter.
Predicted properties of the dark dwarf
According to For paper, sub-estellar objects just below the hydrogen burning threshold would be fed by dark matter. The authors discover that the minimum mass for hydrogen fusion changes above ± 0.075 m⊙ in dense dark matter environments, the lighter brown dwarfs become stable stars with dark power (‘dark dwarfs’) via wimp annihilation within them. They predict that these objects appear only in regions with extremely high-dark raw material density, such as the galactic center (ρ_dm ≳ 10^3 gev/cm^3), because even more halo is very thin. Crucially, the dark dwarfs should retain the lithium-7 in mass lanes where ordinary brown dwarfs burn it, providing a clear observational signature.
Perspectives of observation and implications
Sakstein notes that powerful telescopes like the James Webb Space Telescope You can even detect extremely cold objects, such as dark dwarfs near the galactic center. Alternatively, astronomers can research brown dwarf populations for a rare subclass with anomalous lithium content. Notably, even one confirmed that the dark dwarf would strongly favor the heavy and self-annii dark matter.
Sakstein explains that finding dark dwarfs would provide “convincing evidence” for dark matter that is huge and interact with itself – essentially cowardly or similar particles. He notes that lighter candidates (such as axions) would not produce these stars, so a dark dwarf discovery would break these models. Although not Wimps proof, a dark dwarf detection would imply that dark matter behaves like Wimps (interacting heavily and weakly). In fact, future research and observations of JWST will also test these predictions.