Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...528..789b&link_type=abstract
The Astrophysical Journal, Volume 528, Issue 2, pp. 789-798.
Astronomy and Astrophysics
Astronomy
12
Acceleration Of Particles, Ism: Cosmic Rays, Ism: Magnetic Fields
Scientific paper
The influence of various magnetic field structures of the Galactic disk on some fundamental properties of cosmic-ray protons has been investigated with a simulation program, which generates cosmic-ray trajectories in the disk volume. The regular component of the Galactic magnetic field has been approximated by three different geometrical configurations (circular, elliptical, and spiral). Ages, residence times, and grammages of cosmic protons in various conditions are calculated and discussed. These calculations indicate that the proton age is strongly influenced by the magnetic field configuration but weakly affected by the field strength. The age of cosmic-ray protons in the spiral field turns out to be 6.7x106 yr, and the corresponding matter thickness 12 g cm-2.
Brunetti Maria Teresa
Codino Antonio
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