Hadronic models of the Fermi bubbles: Future perspectives
Abstract
The origin of sub-TeV gamma rays detected by Fermi-LAT from the Fermi bubbles at the Galactic center is still unknown. In a hadronic model, acceleration of protons and/or nuclei and their subsequent interactions with gas in the bubble volume can produce observed gamma rays. Such interactions naturally produce high-energy neutrinos, and detection of those can discriminate between a hadronic and a leptonic origin of gamma rays. Additional constraints on the Fermi bubbles gamma-ray flux in the TeV range from recent HAWC observations restrict hadronic model parameters, which in turn disfavor Fermi bubbles as the origin of a large fraction of neutrino events detected by IceCube along the bubble directions. We revisit our hadronic model and discuss future constraints on parameters from observations in very high-energy gamma rays and neutrinos.
Cite
@article{arxiv.1802.05636,
title = {Hadronic models of the Fermi bubbles: Future perspectives},
author = {Soebur Razzaque and Lili Yang},
journal= {arXiv preprint arXiv:1802.05636},
year = {2018}
}
Comments
9 pages, 4 figures. Invited article submitted to MDPI journal Galaxies for its special issue, Searching for Connections among the Fermi Bubbles, the Galactic Center GeV Excess, and Loop I, edited by D. Malyshev