Dissecting the Inner Galaxy with -Ray Pixel Count Statistics
- 13 October 2021
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 127 (16), 161102
- https://doi.org/10.1103/physrevlett.127.161102
Abstract
We combine adaptive template fitting and pixel count statistics in order to assess the nature of the Galactic Center excess in Fermi-LAT data. We reconstruct the flux distribution of point sources well below the Fermi-LAT detection threshold, and measure their radial and longitudinal profiles in the inner Galaxy. We find that all point sources and the bulge-correlated diffuse emission each contributes of the total inner Galaxy emission, and disclose a potential subthreshold point-source contribution to the Galactic Center excess.
Funding Information
- Ministero dell’Istruzione, dell’Università e della Ricerca (L. 232/2016)
- Agence Nationale de la Recherche (AAPG2019)
- RWTH Aachen University (rwth0578)
- Institut national des sciences de l’Univers
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