Main Image
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - CRD - Cosmic Ray Direct
Unveiling the Origin of Cosmic-ray Leptons in Light of the Recent HAWC TeV-halo Observations
O. Fornieri,* D. Gaggero, D. Grasso
*corresponding author
Full text: pdf
Pre-published on: 2019 July 22
Published on:
Abstract
The interpretation of cosmic-ray (CR) data still represents a significant challenge: a coherent interpretation of the measured CR spectra is hampered by our incomplete knowledge about both the acceleration mechanisms and the transport properties across the Galaxy. The main challenge in this context is to identify a unified picture that includes all the available observables. To this aim, we first perform a multi-channel fit of the available CR data based on the {\tt DRAGON} numerical code, to set the relevant propagation parameters. Then, we discuss several physically-motivated possibilities (\emph{i.e.} recent burst, constant-luminosity, time-dependent emission) for the injection of $e^{+}e^{-}$ pairs accelerated at nearby antimatter factories, such as pulsar wind nebulae, and compute their propagation. Finally, we address the all-lepton spectrum and assess the contributions of both young, nearby supernova remnants, and possibly an additional hidden source, to the observed CR lepton flux above $\sim 1$ TeV recently measured by H.E.S.S., VERITAS, CALET and DAMPE.
Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.