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Study of H alpha macrospicules in coronal holes: Magnetic structure and evolution in relation to photospheric magnetic setting
Yamauchi, Y1; Wang, H1; Jiang YC(姜云春)2; Schwadron, N3; Moore, RL4; Yamauchi, Y (reprint author), New Jersey Inst Technol, Ctr Solar Terr Res, Univ Hts, Newark, NJ 07102 USA.
Source PublicationASTROPHYSICAL JOURNAL
2005-08-10
Volume629Issue:1Pages:572-581
DOI10.1086/431664
Contribution Rank第2完成单位
Indexed BySCI
KeywordSun : Chromosphere Sun : Corona Sun : Magnetic Fields
AbstractSmall-scale solar dynamic events such as spicules, macrospicules, and microflares may play an important role in the coronal heating and solar wind acceleration in coronal holes. In these regions, the network fields concentrated along edges of supergranules are probably the source of the fine-scale activity that may drive the heating and acceleration. Recent H alpha limb observations from Big Bear Solar Observatory (BBSO) have shown that most macrospicules have two different forms of magnetic structure - a spiked jet or an erupting loop, suggesting two different formation mechanisms. In this paper, we analyze BBSO H alpha images and magnetograms of a coronal hole region near the disk center to study the evolution of the two types of macrospicule in relation to the magnetic arrangement at their base. We identified 78 macrospicules from the best day of 3 days of observations. Of these, 65 events were in the form of a spiked jet and were rooted in compact bipolar fields at the edges of the magnetic network. This supports the idea that spiky macrospicules are driven by reconnection between the network bipole and open magnetic fields. We also found five macrospicules that were in the form of an erupting loop oriented along a neutral line between the positive and negative network flux. They appear to be minifilament eruptions. Our results verify the magnetic structure inferred from our previous limb observations and support scenarios of coronal heating and solar wind generation through fine-scale explosive reconnection events seated in the magnetic network.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0004-637X
URL查看原文
Archive Date2006-03-01
WOS IDWOS:000230999600054
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordQUIET SUN ; SOLAR SPICULES ; ACTIVE REGIONS ; MASS EJECTIONS ; FLUX ; CANCELLATION ; NETWORK ; FLARES ; JETS
Citation statistics
Cited Times:19[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6073
Collection太阳物理研究组
Corresponding AuthorYamauchi, Y (reprint author), New Jersey Inst Technol, Ctr Solar Terr Res, Univ Hts, Newark, NJ 07102 USA.
Affiliation1.Center for Solar-Terrestrial Research, New Jersey Institute of Technology, University Heights, Newark, NJ 07102
2.Yunnan Observatory, NAOC, P.O. Box 110, Kunming, China, 650011
3.Southwest Research Institute, 6220 Culebra Road, San Antonio, TX 78238
4.NASA Marshall Space Flight Center, Mail Code SD50, Huntsville, AL 35812
Recommended Citation
GB/T 7714
Yamauchi, Y,Wang, H,Jiang YC,et al. Study of H alpha macrospicules in coronal holes: Magnetic structure and evolution in relation to photospheric magnetic setting[J]. ASTROPHYSICAL JOURNAL,2005,629(1):572-581.
APA Yamauchi, Y,Wang, H,Jiang YC,Schwadron, N,Moore, RL,&Yamauchi, Y .(2005).Study of H alpha macrospicules in coronal holes: Magnetic structure and evolution in relation to photospheric magnetic setting.ASTROPHYSICAL JOURNAL,629(1),572-581.
MLA Yamauchi, Y,et al."Study of H alpha macrospicules in coronal holes: Magnetic structure and evolution in relation to photospheric magnetic setting".ASTROPHYSICAL JOURNAL 629.1(2005):572-581.
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