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arXiv 1503.01035physics.space-phastro-ph.HEastro-ph.SR
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旅行者1号低能银河宇宙线氢和氦谱与氢和氦核等刚度独立源谱的高能量地基测量的拟合

A Fit to the Galactic Cosmic Ray Hydrogen and Helium Spectra at Voyager 1 at Low Energies and Earth Based Measurements at Much Higher Energies with Identical Rigidity Independent Source Spectra for the Hydrogen and Helium Nuclei

W. R. Webber, P. R. Higbie

摘要:

旅行者1号从太阳风层顶以外获得的数据首次直接测量了低于1 GeVnuc的星际宇宙射线谱。在本文中,我们结合这些旅行者测量的H和He核从3-600 MeVnuc更高的能量测量在1 AU的BESS和PAMELA实验高达100 GeVnuc。用加权漏箱模型描述星系中的传播,我们得到了与Voyager观测结果的良好拟合,并得到了高达100 GeVnuc的更高能谱,源谱为P-2.28,其指数从低到高与刚性无关;以及扩散路径长度的刚性依赖性,其在刚性1.00 GV时为P-0.5,并且在较低刚性时可能变为P1.0。

英文摘要:

Voyager 1 data from beyond the heliopause provide the first direct measurements of the interstellar cosmic ray spectra below 1 GeVnuc. In this paper we combine these Voyager measurements of H and He nuclei from 3-600 MeVnuc with higher energy measurements at 1 AU from the BESS and PAMELA experiments up to 100 GeVnuc. Using a Weighted Leaky Box Model for propagation in the galaxy, we obtain an excellent fit to these new Voyager observations and the much higher energy spectra up to 100 GeVnuc by using source spectra which are P-2.28, with the exponent independent of rigidity from low to high rigidities; along with a rigidity dependence of the diffusion path length which is P-0.5 at rigidities 1.00 GV, and possibly changing to P1.0 at lower rigidities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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