Helical lengths of magnetic clouds from the magnetic flux conservation

Tetsuya T. Yamamoto; R. Kataoka; S. Inoue

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

Helical lengths of magnetic clouds from the magnetic flux conservation

Tetsuya T. Yamamoto, R. Kataoka, S. Inoue

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

We estimate axial lengths of helical parts in magnetic clouds (MCs) at 1AU from the magnetic flux (magnetic helicity) conservation between solar active regions (ARs) and MCs with the event list of Leamon etal. Namely, considering poloidal magnetic flux (Φ_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 0.01-1.25AU 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.

Original language	English (US)
Pages (from-to)	456-461
Number of pages	6
Journal	Astrophysical Journal
Volume	710
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/710/1/456
State	Published - 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Solar
Sun: corona
Sun: coronal mass ejections (CMEs)
Sun: magnetic topology
Terrestrial relations

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

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title = "Helical lengths of magnetic clouds from the magnetic flux conservation",

abstract = "We estimate axial lengths of helical parts in magnetic clouds (MCs) at 1AU from the magnetic flux (magnetic helicity) conservation between solar active regions (ARs) and MCs with the event list of Leamon etal. Namely, considering poloidal magnetic flux (ΦP) 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 0.01-1.25AU 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.",

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author = "Yamamoto, {Tetsuya T.} and R. Kataoka and S. Inoue",

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language = "English (US)",

volume = "710",

pages = "456--461",

journal = "Astrophysical Journal",

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TY - JOUR

T1 - Helical lengths of magnetic clouds from the magnetic flux conservation

AU - Yamamoto, Tetsuya T.

AU - Kataoka, R.

AU - Inoue, S.

PY - 2010

Y1 - 2010

N2 - We estimate axial lengths of helical parts in magnetic clouds (MCs) at 1AU from the magnetic flux (magnetic helicity) conservation between solar active regions (ARs) and MCs with the event list of Leamon etal. Namely, considering poloidal magnetic flux (ΦP) 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 0.01-1.25AU 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.

AB - We estimate axial lengths of helical parts in magnetic clouds (MCs) at 1AU from the magnetic flux (magnetic helicity) conservation between solar active regions (ARs) and MCs with the event list of Leamon etal. Namely, considering poloidal magnetic flux (ΦP) 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 0.01-1.25AU 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.

KW - Solar

KW - Sun: corona

KW - Sun: coronal mass ejections (CMEs)

KW - Sun: magnetic topology

KW - Terrestrial relations

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

M3 - Article

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VL - 710

SP - 456

EP - 461

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Helical lengths of magnetic clouds from the magnetic flux conservation

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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