Helical Lengths of Magnetic Clouds from the Magnetic Flux Conservation

Details Helical Lengths of Magnetic Clouds from the Magnetic Flux Conservation Helical Lengths of Magnetic Clouds from the Magnetic Flux Conservation

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...710..456y&link_type=abstract

The Astrophysical Journal, Volume 710, Issue 1, pp. 456-461 (2010).

Astronomy and Astrophysics

Astronomy

6

Solar-Terrestrial Relations, Sun: Corona, Sun: Coronal Mass Ejections: Cmes, Sun: Magnetic Topology

Scientific paper

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 (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 0.01-1.25 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.

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