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28 March 2024
 
  » arxiv » astro-ph/9903163

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Antiprotons at Solar Maximum
John W. Bieber ; R. A. Burger ; Ralph Engel ; Thomas K. Gaisser ; Stefan Roesler ; Todor Stanev ;
Date 11 Mar 1999
Journal Phys.Rev.Lett. 83 (1999) 674-677
Subject astro-ph
AbstractNew measurements with good statistics will make it possible to observe the time variation of cosmic antiprotons at 1 AU through the approaching peak of solar activity. We report a new computation of the interstellar antiproton spectrum expected from collisions between cosmic protons and the interstellar gas. This spectrum is then used as input to a steady-state drift model of solar modulation, in order to provide predictions for the antiproton spectrum as well as the antiproton/proton ratio at 1 AU. Our model predicts a surprisingly large, rapid increase in the antiproton/proton ratio through the next solar maximum, followed by a large excursion in the ratio during the following decade.
Source arXiv, astro-ph/9903163
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