ANTIMATTER PRODUCTION IN SUPERNOVA REMNANTS

Journal Article · Wed Jun 01 00:00:00 EDT 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/733/2/119· OSTI ID:21576710

Kachelriess, M; Ostapchenko, S ^[1]; Tomas, R ^[2]

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1. Institutt for fysikk, NTNU, Trondheim (Norway)
2. II. Institut fuer Theoretische Physik, Universitaet Hamburg (Germany)

We calculate the energy spectra of cosmic rays (CRs) and their secondaries produced in a supernova remnant (SNR) taking into account the time dependence of the SNR shock. We model the trajectories of charged particles as a random walk with a prescribed diffusion coefficient, accelerating the particles at each shock crossing. Secondary production by CRs colliding with gas is included as a Monte Carlo process. We find that SNRs produce less antimatter than suggested previously: the positron/electron ratio F{sub e}{sup +}/F{sub e}{sup +}{sub +e}{sup -} and the antiproton/proton ratio F{sub p-bar/}F{sub p-bar+p} are a few percent and few x 10{sup -5}, respectively. Moreover, the obtained positron/electron ratio decreases with energy, while the antiproton/proton ratio rises at most by a factor of two above 10 GeV.

• OSTI ID: 21576710
• Journal Information: Astrophysical Journal, Vol. 733, Issue 2; Other Information: DOI: 10.1088/0004-637X/733/2/119; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCELERATION
ANTIPROTONS
COSMIC RADIATION
DIFFUSION
ELECTRONS
ENERGY SPECTRA
GRAPH THEORY
PARTICLE PRODUCTION
POSITRONS
SUPERNOVA REMNANTS
TRAJECTORIES
ANTIBARYONS
ANTILEPTONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
BARYONS
COSMIC RADIO SOURCES
ELEMENTARY PARTICLES
FERMIONS
HADRONS
IONIZING RADIATIONS
LEPTONS
MATHEMATICS
MATTER
NUCLEI
NUCLEONS
PROTONS
RADIATIONS
SPECTRA