Work

Critical Aspects of the Nested Leaky-Box Model

Year: 2025

Type: conference-paper

Abstract: Anomalies in cosmic-ray (CR) fluxes, such as the rising positron flux and the flat antiproton-to-proton ratio, have called into question the standard halo model of CR transport and supposedly support alternative models, such as the nested leaky box model. Here, we test such a model in terms of both primary cosmic-ray spectra, spectra of stable and unstable nuclei and antimatter production. We find the standard version of the model should be considered as ruled out as it is in direct conflict with several observational facts and current data. We further show that the flat antiproton-over-proton ratio proves that the Galactic residence time cannot be energy-independent.

Source: International Cosmic Ray Conference

DOI: 10.22323/1.501.0129

Authors: Benedikt Schroer, Carmelo Evoli, Pasquale Blasi

Institution: University of Chicago

Language: English

Topic: Astrophysics and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: National Science Foundation, European Commission, Istituto Nazionale di Fisica Nucleare

Awards: A Kinetic Investigation of Plasma Instabilities Driven By Energetic Particles, Collaborative Research: Cosmic Ray Feedback from Plasma to Circumgalactic Scales, G5331879140, G903117326