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yesterday

Scientists Publish Dark Dwarfs Theory and Map Out JWST Search at Galactic Center

Researchers plan targeted JWST infrared observations of the Galactic Center to detect lithium-7 signals from these dark matter–fueled brown dwarfs

Artist's concept of a dark dwarf, a dwarf star containing dark matter. A new study suggests that dark dwarfs in the center of the Milky Way - if they exist - could help astronomers better understand what dark matter actually is. Image via SISSA Medialab/ EurekAlert! (CC BY 4.0).

Overview

  • The Dark Dwarfs hypothesis published in JCAP proposes that low-mass objects in dark matter–rich regions glow via annihilation of heavy WIMPs rather than nuclear fusion
  • Only self-interacting, massive particles like WIMPs can accumulate inside brown dwarfs and produce the energy signature defining dark dwarfs
  • Retention of lithium-7 is identified as a definitive spectral marker, since this isotope is rapidly destroyed in ordinary stellar and sub-stellar objects
  • Teams will use JWST’s infrared sensitivity to hunt for extremely cold objects at the Galactic Center exhibiting lithium-7 absorption features
  • Complementary statistical studies of brown dwarf populations aim to reveal a hidden dark dwarf cohort, though no candidates have yet been confirmed