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arXiv 1704.06337astro-ph.HE
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日光层传播的解:揭示cosmic ray物种的局部星际光谱

Solution of heliospheric propagation: unveiling the local interstellar spectra of cosmic ray species

M. J. Boschini, S. Della Torre, M. Gervasi, D. Grandi, G. Johannesson, M. Kachelriess, G. La Vacca, N. Masi, I. V. Moskalenko, E. Orlando, S. S. Ostapchenko, S.… 展开作者

M. J. Boschini, S. Della Torre, M. Gervasi, D. Grandi, G. Johannesson, M. Kachelriess, G. La Vacca, N. Masi, I. V. Moskalenko, E. Orlando, S. S. Ostapchenko, S. Pensotti, T. A. Porter, L. Quadrani, P. G. Rancoita, D. Rozza, M. Tacconi

摘要:

本地星际光谱(LIS)的质子,氦和反质子的建立使用最新的实验结果结合国家的最先进的模型在银河系和日光层中的传播。两个传播包,GALPROP和HelMod,结合起来,提供一个单一的框架,运行复制宇宙射线(CR)物种在不同的调制水平和太阳磁场的两个极性的直接测量。为了以自洽的方式实现这一点,开发了一种迭代程序,其中GALPROP LIS输出被馈送到HelMod中,HelMod提供所选实验的特定时间段的调制光谱以与数据进行比较;在此阶段进行HelMod参数优化,并循环返回以使用新的GALPROP运行调整LIS。使用1997-2015年的大量质子光谱数据集,使用极大似然程序调整参数。建议的LIS既包含旅行者1号测量的低能星际CR光谱,也包含BESS、Pamela、AMS-01和AMS-02从气球和近地有效载荷进行的高能观测;它还考虑了黄道平面外测量的计数率特征。在整个能量范围内,所得到的解与AMS-02、BESS和PAMELA的质子、氦和反质子数据符合得很好。

英文摘要:

Local interstellar spectra (LIS) for protons, helium and antiprotons are built using the most recent experimental results combined with the state-of-the-art models for propagation in the Galaxy and heliosphere. Two propagation packages, GALPROP and HelMod, are combined to provide a single framework that is run to reproduce direct measurements of cosmic ray (CR) species at different modulation levels and at both polarities of the solar magnetic field. To do so in a self-consistent way, an iterative procedure was developed, where the GALPROP LIS output is fed into HelMod that provides modulated spectra for specific time periods of selected experiments to compare with the data; the HelMod parameters optimization is performed at this stage and looped back to adjust the LIS using the new GALPROP run. The parameters were tuned with the maximum likelihood procedure using an extensive data set of proton spectra from 1997-2015. The proposed LIS accommodate both the low energy interstellar CR spectra measured by Voyager 1 and the high energy observations by BESS, Pamela, AMS-01, and AMS-02 made from the balloons and near-Earth payloads; it also accounts for Ulysses counting rate features measured out of the ecliptic plane. The found solution is in a good agreement with proton, helium, and antiproton data by AMS-02, BESS, and PAMELA in the whole energy range.

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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