PoS - Proceedings of Science
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - CRD - Cosmic Ray Direct
Multi-messenger constraints to the local emission of cosmic-ray electrons
F. Donato,* S. Manconi, M. DiMauro
*corresponding author
Full text: pdf
Pre-published on: July 22, 2019
Published on:
The data on the inclusive flux of cosmic positrons and electrons ($e^++e^{-}$) have been recently collected from GeV to tens of TeV energies by several experiments with unprecedented precision. In addition, the {\it Fermi}-LAT Collaboration has provided a new energy spectrum for the upper bounds on the $e^++e^{-}$ dipole anisotropy.
This observable can bring information on the emission from local Galactic sources, notably measured with high precision at radio frequencies.
We develop a framework in which $e^-$ and $e^+$ measured at Earth from GeV up to tens of TeV energies have a composite origin.
A dedicated analysis is deserved to Vela YZ and Cygnus Loop Supernova Remnants (SNRs), for which we consider two different models for the injection of $e^-$.
We investigate the consistency of these models using the three physical observables: the {\it radio flux} from Vela YZ and Cygnus Loop at all the available frequencies,
the {\it $e^++e^-$ flux} from five experiments from the GeV to tens of TeV energy,
the {\it $e^++e^-$ dipole anisotropy} upper limits from 50 GeV to about 1 TeV.
We find that the radio flux for these nearby SNRs strongly constraints the properties of the injection electron spectrum,
partially compatible with the looser constraints derived from the $e^+ + e^-$ flux data. We also perform a multi-wavelength multi-messenger analysis by fitting
simultaneously the radio flux on Vela YZ and Cygnus Loop and the $e^+ + e^-$ flux, and checking the outputs against the $e^+ + e^-$ dipole anisotropy data.
Remarkably, we find a model which is compatible with all the $e^++e^-$ flux data, the radio data for Vela YZ and Cygnus Loop, and with the anisotropy upper bounds.
We show the severe constraints imposed by the most recent data on the $e^+ + e^-$ dipole anisotropy.
DOI: https://doi.org/10.22323/1.358.0060
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.