http://arxiv.org/abs/2106.00222
Gamma-ray data from the Fermi-Large Area Telescope reveal an unexplained, apparently diffuse, signal from the Galactic bulge. The origin of this “Galactic Center Excess” (GCE) has been debated with proposed sources prominently including self-annihilating dark matter and a hitherto undetected population of millisecond pulsars (MSPs). We use a binary population synthesis forward model to demonstrate that an MSP population arising from the accretion induced collapse of O-Ne white dwarfs in Galactic bulge binaries can naturally explain the GCE. Synchrotron emission from MSP-launched cosmic ray electrons and positrons seems also to explain the mysterious “haze” of hard-spectrum, non-thermal microwave emission from the inner Galaxy detected in WMAP and Planck data.
A. Gautam, R. Crocker, L. Ferrario, et. al.
Wed, 2 Jun 21
24/48
Comments: 5 pages, 5 figures main text + 22 pages supplementary material. The authors invite constructive comments
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