Production of Antiprotons in Interstellar Space by Propagating Cosmic Rays under Conditions of Diffusive Reacceleration

Abstract

view Abstract Citations (30) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Production of Antiprotons in Interstellar Space by Propagating Cosmic Rays under Conditions of Diffusive Reacceleration Simon, M. ; Heinbach, U. Abstract The propagation of cosmic rays in the Galaxy is understood as a diffusive process in which the magnetic field irregularities serve as scatter centers. Particles that interact with turbulent magnetic field irregularities can gain energy because of stochastic, second-order, Fermi type of acceleration. We could show that such a propagation scenario, in which the particles are primary preenergized at the outsets and then reaccelerated during propagation, is completely compatible with the observation of cosmic-ray nuclear data, such as cosmic-ray spectra and the secondary/primary ratio of boron/carbon and subiron/iron. In this context, we present here results of the expected interstellar secondary antiproton flux via p + p → bar-p + x interactions in the framework of this diffusive reacceleration model. We can show that the interstellar bar-p spectrum under these conditions looks very different from that calculated in the Standard Leaky Box situation. Publication: The Astrophysical Journal Pub Date: January 1996 DOI: 10.1086/176676 Bibcode: 1996ApJ...456..519S Keywords: ACCELERATION OF PARTICLES; ISM: COSMIC RAYS; ELEMENTARY PARTICLES full text sources ADS |