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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.
发表期刊ASTROPHYSICAL JOURNAL
2005-08-10
卷号629期号:1页码:572-581
DOI10.1086/431664
产权排序第2完成单位
收录类别SCI
关键词Sun : Chromosphere Sun : Corona Sun : Magnetic Fields
摘要Small-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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2006-03-01
WOS记录号WOS:000230999600054
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]QUIET SUN ; SOLAR SPICULES ; ACTIVE REGIONS ; MASS EJECTIONS ; FLUX ; CANCELLATION ; NETWORK ; FLARES ; JETS
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被引频次:18[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6073
专题太阳物理研究组
通讯作者Yamauchi, Y (reprint author), New Jersey Inst Technol, Ctr Solar Terr Res, Univ Hts, Newark, NJ 07102 USA.
作者单位1.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
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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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