Effects of Anomalous Cosmic Rays on the Structure of the Outer Heliosphere

	Effects of Anomalous Cosmic Rays on the Structure of the Outer Heliosphere
	Guo, Xiaocheng; Florinski, Vladimir; Wang, Chi; Guo, XC (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.; Guo, XC (reprint author), Univ Chinese Acad Sci, Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China.
刊名	ASTROPHYSICAL JOURNAL
	2018
卷号	859 期号:2 页码:157
关键词	Cosmic Rays Diffusion Magnetohydrodynamics (Mhd) Methods: Numerical Plasmas Sun: Heliosphere
ISSN号	0004-637X
英文摘要	Based on Voyager 1 observations, some anomalous cosmic rays (ACRs) may have crossed the heliopause and escaped into the interstellar medium, providing a mechanism of energy transfer between the inner and outer heliosheaths that is not included in conventional magnetohydrodynamics (MHD) models. In this paper, we study the effect of energetic particles' escape through the heliopause on the size and shape of the heliosphere using a simple model that includes diffusive transport of cosmic rays. We show that the presence of ACRs significantly changes the heliosphere structure, including the location of the heliopause and termination shock. It was found that the heliopause would contract for certain values of the ACR diffusion coefficients when the diffusive particles' pressure is comparable to the pressure of the plasma background. The difference in Voyager 1 and 2 observations of energetic particles during their respective termination shock crossings is interpreted here as due to the differences in diffusion environments during the different phases of the solar cycle. The shorter period of enhanced ACR intensities upstream of the shock measured by Voyager 2 may have been caused by weaker radial diffusive transport compared with the time of Voyager 1 crossing. We conclude that ACR diffusive effects could be prominent and should be included in MHD models of the heliosphere.
语种	英语
资助机构	NNSFC [41674146, 41731070, 41574159] ; Specialized Research Fund for State Key Laboratories of China ; NSSC research fund for key development directions ; Strategic Pioneer Program on Space Science of CAS [XDA15052500] ; NASA [NNX13AF99G, QYZDJ-SSW-JSC028, NNX17AB85G]
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/6324]
专题	国家空间科学中心_空间科学部
通讯作者	Guo, XC (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.; Guo, XC (reprint author), Univ Chinese Acad Sci, Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China.
推荐引用方式 GB/T 7714	Guo, Xiaocheng,Florinski, Vladimir,Wang, Chi,et al. Effects of Anomalous Cosmic Rays on the Structure of the Outer Heliosphere[J]. ASTROPHYSICAL JOURNAL,2018,859(2):157.
APA	Guo, Xiaocheng,Florinski, Vladimir,Wang, Chi,Guo, XC ,&Guo, XC .(2018).Effects of Anomalous Cosmic Rays on the Structure of the Outer Heliosphere.ASTROPHYSICAL JOURNAL,859(2),157.
MLA	Guo, Xiaocheng,et al."Effects of Anomalous Cosmic Rays on the Structure of the Outer Heliosphere".ASTROPHYSICAL JOURNAL 859.2(2018):157.