Interplanetary flux ropes of any twist distribution

0519741 - ASÚ 2020 RIV FR eng J - Journal Article
Vandas, Marek - Romashets, E.
Interplanetary flux ropes of any twist distribution.
Astronomy & Astrophysics. Roč. 627, July (2019), č. článku A90. ISSN 0004-6361. E-ISSN 1432-0746
R&D Projects: GA ČR(CZ) GA17-06065S
Institutional support: RVO:67985815
Keywords : Sun * magnetic fields * coronal mass ejections
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.636, year: 2019
Method of publishing: Limited access
https://doi.org/10.1051/0004-6361/201935216

Recent investigations indicate that the magnetic field configuration in interplanetary flux ropes is in contrast with the common magnetic field models that are used to fit them, namely constant-alpha force-free fields, whose twist increases without limits toward the flux-rope boundary. Therefore, magnetic field configurations with a constant twist are now being employed in fits. A model of a force-free magnetic field configuration with an arbitrarily given twist distribution in a cylinder and its
relative helicity per unit length are presented. It is applied to a core-envelope model recently suggested in studies of twist in magnetic clouds.
Permanent Link: http://hdl.handle.net/11104/0304731