Fermi-eROSITA cross-correlations suggest annihilation lines of about70 GeV WIMPs

arXiv:2606.17044 · astro-ph.HE, astro-ph.CO, hep-ph · Submitted 2026-06-15 · Read on arXiv

astro-ph.HE, astro-ph.CO, hep-ph

Submitted: 2026-06-15

Updated: 2026-10-07

Comments: Additional robustness tests

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Aperture — 20× in this paper · explained in 1 episode
• Core — 5× in this paper · explained in 2 episodes
• Velocity Dispersion — 4× in this paper · explained in 2 episodes
• Adam — 3× in this paper · explained in 2 episodes
• Calibration — 3× in this paper · explained in 7 episodes
• Abundance — 2× in this paper · explained in 1 episode
• Trace — 2× in this paper · explained in 2 episodes
• Accuracy — 1× in this paper · explained in 1 episode
• Alignment — 1× in this paper · explained in 1 episode
• Consistency — 1× in this paper · explained in 3 episodes
• Gravitational Lensing — 1× in this paper · explained in 2 episodes
• Metallicity — 1× in this paper · explained in 3 episodes
• Robustness — 1× in this paper · explained in 5 episodes
• Signal-to-noise ratio (SNR) — 1× in this paper · explained in 2 episodes
• Sparsity — 1× in this paper · explained in 4 episodes
• Spectral Signature — 1× in this paper · explained in 2 episodes

Sources

• Common origin for radio relics and halos: galaxy cluster-wide, homogeneous cosmic-ray distribution, and evolving magnetic fields
• Coma cluster $\gamma$-ray and radio emission is consistent with a secondary electron origin for the radio halo
• Galaxy-cluster-stacked Fermi-LAT III: substructure and radio-relic counterparts
• Fermi-LAT improved Pass~8 event selection

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