HELICAL LENGTHS OF MAGNETIC CLOUDS FROM THE MAGNETIC FLUX CONSERVATION

被引：8

作者：

Yamamoto, Tetsuya T. ^{[1
]}

Kataoka, R. ^{[2
]}

Inoue, S. ^{[3
]}

机构：

[1] Nagoya Univ, Solar Terr Environm Lab, Chikusa Ku, Nagoya, Aichi 4648601, Japan

[2] Tokyo Inst Technol, Interact Res Ctr Sci, Tokyo 1528550, Japan

[3] Natl Inst Informat & Commun Technol, Koganei, Tokyo 1848795, Japan

来源：

ASTROPHYSICAL JOURNAL | 2010年 / 710卷 / 01期

关键词：

solar-terrestrial relations; Sun: corona; Sun: coronal mass ejections (CMEs); Sun: magnetic topology; BUDGET; CORONA; EVENT;

D O I：

10.1088/0004-637X/710/1/456

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We estimate axial lengths of helical parts in magnetic clouds (MCs) at 1 AU from the magnetic flux (magnetic helicity) conservation between solar active regions (ARs) and MCs with the event list of Leamon et al. Namely, considering poloidal magnetic flux (Phi(P)) conservation between MCs and ARs, we estimated L-h in MCs, where L-h is the axial length of an MC where poloidal magnetic flux and magnetic twist exist. It is found that L-h is 0.01-1.25 AU in the MCs. If the cylinder flux rope picture is assumed, this result leads to a possible new picture of the cylinder model whose helical structure (namely, poloidal magnetic flux) localizes in a part of a MC.

引用

页码：456 / 461

页数：6

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