Tag: #darkmatter

H.E.S.S. detects no gamma-ray line from Galactic Centre, but reaches thermal Higgsino benchmark

H.E.S.S.'s deepest search found no gamma-ray line from the Galactic Centre but sets the strongest limits yet, probing thermal Higgsino models.

#darkmatter, #astronomy, #gamma-rays, #astrophysics

XENONnT's Ionization-Only Search Tightens Limits on Few‑GeV Dark Matter

XENONnT's 7.8 tonne‑year ionization‑only search finds no dark‑matter signal, setting stronger limits on few‑GeV candidates and edging toward the solar‑neutrino floor.

#darkmatter, #xenonnt, #particlephysics, #neutrinos

Preprint Suggests Dark Matter–Dark Energy Interaction Could Explain DESI Anomalies

A revised arXiv preprint argues DESI-era tensions with ΛCDM may be explained by dark matter–dark energy interactions rather than evolving dark energy.

#cosmology, #darkenergy, #darkmatter, #desi

UCL Reanalysis Confirms 20 GeV Gamma‑Ray Halo Around Milky Way, but Stops Short of Dark‑Matter Claim

UCL reanalysis finds a persistent 20 GeV gamma‑ray halo in Fermi-LAT data around the Milky Way but cautions it's consistent with—not proof of—dark matter.

#astronomy, #darkmatter, #fermilat, #astrophysics

Keck Spectroscopy Finds Third Dark-Matter–Deficient Galaxy in NGC 1052 Field

Keck spectroscopy suggests NGC 1052-DF9, like DF2 and DF4, shows stellar motions consistent with little dark matter — but distances and measurements remain uncertain.

#astronomy, #darkmatter, #dwarfgalaxies, #ngc1052

Reanalysis finds no evidence of planetary‑mass primordial black holes in Andromeda data

Independent reanalysis finds 12 short events in Subaru observations of M31 are ordinary stellar variability, not planetary‑mass primordial black holes.

#darkmatter, #primordialblackholes, #astronomy, #andromeda