AbstractRecent measurements of the cosmic ray (CR) antiproton flux have been shown to challenge existing CR propagation models. It was shown that the reacceleration models designed to match secondary to primary nuclei ratios (e.g., B/C) produce too few antiprotons. In the present paper, we discuss one possibility to overcome these difficulties. Using the measured antiproton flux and B/C ratio to fix the diffusion coefficient, we show that the spectra of primary nuclei as measured in the heliosphere may contain a fresh local “unprocessed” component at low energies perhaps associated with the Local Bubble, thus decreasing the measured secondary to primary nuclei ratio. The independent evidence for SN activity in the solar vicinity in the last few Myr supports this idea. The model reproduces antiprotons, B/C ratio, and elemental abundances up to Ni (Z⩽28). Calculated isotopic distributions of Be and B are in perfect agreement with CR data. The abundances of three “radioactive clock” isotopes in CR, 10Be, 26Al, 36Cl, are all consistent and indicate a halo size zh∼4 kpc based on the most accurate data taken by the ACE spacecraft.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Propagation of secondary antiprotons and cosmic rays in the Galaxy


    Beteiligte:
    Moskalenko, I.V. (Autor:in) / Strong, A.W. (Autor:in) / Ormes, J.F. (Autor:in) / Mashnik, S.G. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 35 , 1 ; 156-161


    Erscheinungsdatum :

    2003-08-22


    Format / Umfang :

    6 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Propagation of secondary antiprotons and cosmic rays in the Galaxy

    Moskalenko, I. V. / Strong, A. W. / Ormes, J. F. et al. | British Library Conference Proceedings | 2005


    Cosmic-ray antiprotons in the galaxy

    Sina, R. / Ptuskin, V. S. / Seo, E. S. et al. | British Library Conference Proceedings | 2005


    Cosmic-ray antiprotons in the galaxy

    Sina, R. | Online Contents | 2005


    Cosmic-ray antiprotons in the galaxy

    Sina, R. / Ptuskin, V.S. / Seo, E.S. | Elsevier | 2003