Dissecting the inner Galaxy with $\gamma$-ray pixel count statistics
High Energy Astrophysical Phenomena
2021-10-29 v2 High Energy Physics - Phenomenology
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 the bulge-correlated diffuse emission each contributes (10\%) of the total inner Galaxy emission, and disclose a potential sub-threshold point-source contribution to the Galactic center excess.
Keywords
Cite
@article{arxiv.2102.12497,
title = {Dissecting the inner Galaxy with $\gamma$-ray pixel count statistics},
author = {Francesca Calore and Fiorenza Donato and Silvia Manconi},
journal= {arXiv preprint arXiv:2102.12497},
year = {2021}
}
Comments
5+8 pages, 2+6 figures. Minor changes to match version published in PRL