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Where do the 3.5 keV photons come from? A morphological study of the Galactic Center and of Perseus

Profumo, Stefano; Jeltema, Tesla; Carlson, Eric

We test the origin of the 3.5 keV line photons by analyzing the morphology of the emission at that energy from the Galactic Center and from the Perseus cluster of galaxies. We employ a variety of different templates to model the continuum emission and analyze the resulting radial and azimuthal distribution of the residual emission. We then perform…

Observational consistency and future predictions for a 3.5 keV ALP to photon line

Conlon, Joseph P.; Rummel, Markus; Alvarez, Pedro D. +2 more

Motivated by the possibility of explaining the 3.5 keV line through dark matter decaying to axion-like particles that subsequently convert to photons, we study ALP-photon conversion for sightlines passing within 50 pc of the galactic centre. Conversion depends on the galactic centre magnetic field which is highly uncertain. For fields at low or mi…