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Comparative Analyses of Plasma Properties and Composition in Two Types of Small-scale Interplanetary Flux-ropes
Huang J(黄锦)1,2; Liu Y(刘煜)1,2; Liu, Jihong3; Shen YD(申远灯)1,2
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2020-08-01
Volume899Issue:2Pages:8
DOI10.3847/2041-8213/abac18
Contribution Rank第1完成单位
Indexed BySCI
KeywordSolar wind Interplanetary physics Solar coronal mass ejections
Abstract

The origin of small-scale interplanetary magnetic flux-ropes (SIMFRs) and the relationship between SIMFRs and magnetic clouds (MCs) are still controversial. In this study, two populations of SMIFRs were collected, i.e., SIMFRs originating from the Sun (SIMFR-SUN) and those originating from the solar wind (SIMFR-SW). We defined the SIMFR-SUN (SIMFR-SW) as the SMIFRs that include (exclude) the counter-streaming suprathermal electrons and stay away from (close to) the heliospheric current sheet. After fitting with force-free flux-rope model, 52 SIMFR-SUN and 57 SIMFR-SW events observed by Advanced Composition Explorer from 1998 February to 2011 August were qualified. Using the approach of relating the measurements to their spatial position within the flux ropes, a comparative survey of plasma and composition characteristics inside the two populations of SIMFRs is presented. Results show that the two populations of SIMFRs have apparent differences. Compared with SIMFR-SW, SIMFR-SUN are MC-like, featuring lower central proton density, higherV(rad), higher low-FIP element abundances, higher and more fluctuate average ion charge-states and the ion charge-state ratios that are related to the heating in the low corona. In addition, for the ion charge-state distributions inside SIMFR-SUN, the sunward side is higher than earthward, which might be caused by the flare heating during eruption. Moreover, both SIMFR-SUN and MCs show anticorrelation between plasma beta and the He/P trend. These characteristics indicate that SIMFR-SUN and MCs are very likely to have identical origination. This study supports the two-source origin of SIMFRs, i.e., the solar corona and the solar wind.

Funding ProjectStrategic Priority Research Program of CAS[XDA-17040507] ; National Science Foundation of China[NSFC 11533009] ; National Science Foundation of China[11973086]
Funding OrganizationStrategic Priority Research Program of CAS[XDA-17040507] ; National Science Foundation of China[NSFC 11533009, 11973086]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN2041-8205
URL查看原文
WOS IDWOS:000563110600001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordSOLAR-WIND ; CHARGE STATES ; MAGNETIC RECONNECTION ; CLOUDS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/23663
Collection选址与日冕观测组
Corresponding AuthorHuang J(黄锦)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
2.University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
3.College of Physics and Electric Information Engineering, Shijiazhuang University, Shijiazhuang 050035, People's Republic of China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Huang J,Liu Y,Liu, Jihong,et al. Comparative Analyses of Plasma Properties and Composition in Two Types of Small-scale Interplanetary Flux-ropes[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,899(2):8.
APA Huang J,Liu Y,Liu, Jihong,&Shen YD.(2020).Comparative Analyses of Plasma Properties and Composition in Two Types of Small-scale Interplanetary Flux-ropes.ASTROPHYSICAL JOURNAL LETTERS,899(2),8.
MLA Huang J,et al."Comparative Analyses of Plasma Properties and Composition in Two Types of Small-scale Interplanetary Flux-ropes".ASTROPHYSICAL JOURNAL LETTERS 899.2(2020):8.
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