Mapping the AMS-02 and CALET data onto the source spectra and residence times of Galactic cosmic rays

被引：0
作者：
Cowsik, Ramanath [1 ]
Huth, Dawson [1 ]
机构：
[1] Washington Univ, Phys Dept, 1 Brookings Dr, St Louis, MO 63130 USA
来源：
PHYSICAL REVIEW D | 2024年 / 110卷 / 02期
关键词：
ENERGY-SPECTRA; PROPAGATION; NUCLEI; BORON; ANTIPROTONS; CONSTRAINTS; INTENSITIES; POSITRONS; TRANSPORT; SECONDARY;
D O I：
10.1103/PhysRevD.110.023028
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The recent measurements of the spectral intensities of cosmic-ray nuclei have suggested that the ratio of boron to carbon nuclei, R ( E ) , comprises two components, R 1 ( E ) which carries all of the energy dependence and the other R A , a constant independent of energy per nucleon. This finding supports the earlier theoretical expectations and results of gamma-ray astronomy that one of these components is attributable to spallation in a cocoon like region surrounding the sources and the other in the general interstellar medium before cosmic rays leak away from the Galaxy. A new model-independent way of analyzing cosmic-ray spectra is presented here to shed light on the recent findings: Imposing the single constraint that the source function of B nuclei is minimal we use a cascade of rate equations to map point by point the observed cosmic-ray spectra of p, B, C, O, and Fe onto their source spectra and the two lifetimes of cosmic rays rG G in the Galaxy and rS S in the cocoons surrounding the sources. The model-independent results show that the appropriate choice rS(E) S ( E ) is responsible for R 1 ( E ) and the source spectra are power laws with indices of similar to - 2.7.
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