Steady-State Flux of Positrons and the Age of the Galactic Halo

Details Steady-State Flux of Positrons and the Age of the Galactic Halo Steady-State Flux of Positrons and the Age of the Galactic Halo

Aug 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969pthph..42..213l&link_type=abstract

Progress of Theoretical Physics, Vol. 42, No. 2, pp. 213-218

Physics

Scientific paper

In solving the continuity equation which describes the intensity of cosmic-ray electrons and positrons in interstellar space, one makes the a priori assumption that steady-state condition exists. In this paper we have investigated the condition under which this assumption is justified. We further show that if the cosmic rays are assumed to be confined uniformly throughout the galactic disc and the halo, then the age of the halo should be ≳ 108 years to account for the agreement between the calculated and observed flux of positrons in the primary component of cosmic rays.

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