On the contribution of a hard galactic plane component to the excesses of secondary particles

doi:10.1088/1674-1137/40/11/115001

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

	On the contribution of a hard galactic plane component to the excesses of secondary particles
	Guo YQ(郭义庆); Hu HB(胡红波); Tian Z(田珍); Guo, YQ; Hu, HB; Tian, Z
刊名	CHINESE PHYSICS C
	2016
卷号	40 期号:11
关键词	cosmic ray gamma ray neutrino
DOI	10.1088/1674-1137/40/11/115001
通讯作者	郭义庆
英文摘要	The standard model of cosmic ray propagation has been very successful in explaining all kinds of galactic cosmic ray spectra. However, high precision measurement have recently revealed an appreciable discrepancy between data and model expectations, from spectrum observations of gamma-rays, e(+)/e(-) and probably the B/C ratio starting from similar to 10 GeV energy. In this work, we propose that a hard galactic plane component, supplied by the fresh cosmic ray sources and detained by local magnetic fields, can contribute additional secondary particles interacting with local materials. By properly choosing the intensity and spectral index of the harder component up to multi-TeV energy, a two-component gamma-ray spectrum is obtained and agrees very well with the observation. Simultaneously, the expected neutrino numbers from the galactic plane could contribute similar to 60% of IceCube observed neutrino number below a few hundreds of TeV under our model. In addition to these studies, we find that the same pp-collision process responsible for the excess gamma ray emission could account for a significant amount of the positron excess, but a more detailed mechanism is needed for a full agreement. It is expected that the excesses in the (p) over bar /p and B/C ratio will show up when energy is above similar to 10 GeV. We look forward this model being tested in the near future by new observations from AMS02, IceCube, AS gamma, HAWC and future experiments such as LHASSO, HiSCORE and CTA.
语种	英语
WOS记录号	WOS:000389144400015
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/260810]
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	Guo YQ,Hu HB,Tian Z,et al. On the contribution of a hard galactic plane component to the excesses of secondary particles[J]. CHINESE PHYSICS C,2016,40(11).
APA	郭义庆,胡红波,田珍,Guo, YQ,Hu, HB,&Tian, Z.(2016).On the contribution of a hard galactic plane component to the excesses of secondary particles.CHINESE PHYSICS C,40(11).
MLA	郭义庆,et al."On the contribution of a hard galactic plane component to the excesses of secondary particles".CHINESE PHYSICS C 40.11(2016).