High-energy antiprotons from old supernova remnants

Details High-energy antiprotons from old supernova remnants High-energy antiprotons from old supernova remnants

2009-04-06

arxiv.org/abs/0904.0871v2

Phys.Rev.Lett.103:081103,2009

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 1 figure; minor revision, matches published version

Scientific paper

10.1103/PhysRevLett.103.081103

A recently proposed model (arXiv:0903.2794) explains the rise in energy of the positron fraction measured by the PAMELA satellite in terms of hadronic production of positrons in aged supernova remnants, and acceleration therein. Here we present a preliminary calculation of the anti-proton flux produced by the same mechanism. While the model is consistent with present data, a rise of the antiproton to proton ratio is predicted at high energy, which strikingly distinguishes this scenario from other astrophysical explanations of the positron fraction (like pulsars). We briefly discuss important implications for Dark Matter searches via antimatter.

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