TL;DR
This study revisits the Galactic Center Excess using new high-resolution gamma-ray templates and multi-messenger data, finding a high-energy tail that challenges millisecond pulsar explanations and supports dark matter annihilation models.
Contribution
Introduces a new set of galactic diffuse gamma-ray templates and applies multi-messenger constraints, refining the characterization of the GCE and its possible origins.
Findings
High-energy tail in the GCE, especially in the northern hemisphere.
Millisecond pulsars are unlikely to produce the high-energy emission.
Dark matter annihilation around 40 GeV fits the GCE well, especially in the southern sky.
Abstract
The Galactic center excess (GCE) remains one of the most intriguing discoveries from the Fermi Large Area Telescope (LAT) observations. We revisit the characteristics of the GCE by first producing a new set of high-resolution galactic diffuse gamma-ray emission templates, which are ultimately due to cosmic-ray interactions with the interstellar medium. Using multi-messenger observations we constrain the properties of the galactic diffuse emission. The broad properties of the GCE that we find in this work are qualitatively unchanged despite the introduction of this new set of templates, though its quantitative features appear mildly different than those obtained in previous analyses. In particular, we find a high-energy tail at higher significance than previously reported. This tail is very prominent in the northern hemisphere, and less so in the southern hemisphere. This strongly…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Code & Models
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
