Propagation of cosmic rays in the AMS-02 era

doi:10.1103/PhysRevD.95.083007

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	Propagation of cosmic rays in the AMS-02 era
	Lin SJ(林苏杰); Bi, XJ; Fang, K; Lin, SJ; Yuan, Q; Bi XJ(毕效军); Fang K(方堃)
刊名	PHYSICAL REVIEW D
	2017
卷号	95 期号:8 页码:83007
ISSN号	2470-0010
DOI	10.1103/PhysRevD.95.083007
文献子类	Article
英文摘要	In this work we use the newly reported boron-to-carbon ratio (B/C) from AMS-02 and the time-dependent proton fluxes from PAMELA and AMS-02 to constrain the source and propagation parameters of cosmic rays in the Milky Way. A linear correlation of the solar modulation parameter with solar activities is assumed to account for the time-varying cosmic ray fluxes. A comprehensive set of propagation models, with or without reacceleration or convection, has been discussed and compared. We find that only the models with reacceleration can self-consistently fit both the proton and B/C data. The rigidity dependence slope of the diffusion coefficient, delta, is found to be about 0.38-0.50 for the diffusion-reacceleration models. The plain diffusion and diffusion-convection models fit the data poorly. We compare different model predictions of the positron and antiprotonfluxes with the data. We find that the diffusion-reacceleration models overproduce low energy positrons, while nonreacceleration models give better fit to the data. As for antiprotons, reacceleration models tend to underpredict low energy antiproton fluxes, unless a phenomenological modification of the velocity dependence of the diffusion coefficient is applied. Our results suggest that there could be important differences of the propagation for nuclei and leptons, in either the Milky Way or the solar heliosphere.
电子版国际标准刊号	2470-0029
WOS关键词	MONTE-CARLO TECHNIQUE ; SOLAR MODULATION ; ENERGY-SPECTRA ; INTERSTELLAR-MEDIUM ; SUPERNOVA-REMNANTS ; BAYESIAN-ANALYSIS ; SOURCE PARAMETERS ; SAMPLE TRANSPORT ; DIFFUSION-MODEL ; NUCLEI
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000399806900003
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284450]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Lin SJ,Bi, XJ,Fang, K,et al. Propagation of cosmic rays in the AMS-02 era[J]. PHYSICAL REVIEW D,2017,95(8):83007.
APA	林苏杰.,Bi, XJ.,Fang, K.,Lin, SJ.,Yuan, Q.,...&方堃.(2017).Propagation of cosmic rays in the AMS-02 era.PHYSICAL REVIEW D,95(8),83007.
MLA	林苏杰,et al."Propagation of cosmic rays in the AMS-02 era".PHYSICAL REVIEW D 95.8(2017):83007.