Antiprotons at Solar Maximum
Astrophysics
2009-10-31 v1
Abstract
New 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.
Keywords
Cite
@article{arxiv.astro-ph/9903163,
title = {Antiprotons at Solar Maximum},
author = {John W. Bieber and R. A. Burger and Ralph Engel and Thomas K. Gaisser and Stefan Roesler and Todor Stanev},
journal= {arXiv preprint arXiv:astro-ph/9903163},
year = {2009}
}
Comments
5 pages RevTeX, 3 figures included