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Magnetic flux ropes within interplanetary coronal mass ejections are often characterized as simplistic cylindrical or toroidal tubes with field lines that twist around the cylinder or torus axis. Recent multi-point observations suggest that…

Solar and Stellar Astrophysics · Physics 2024-06-21 Andreas J. Weiss , Teresa Nieves-Chinchilla , Christian Möstl

Observations of magnetic clouds, within interplanetary coronal mass ejections (ICMEs), are often well described by flux rope models. Most of these assume either a cylindrical or toroidal geometry. In some cases, these models are also…

Solar and Stellar Astrophysics · Physics 2022-12-07 Andreas J. Weiss , Teresa Nieves-Chinchilla , Christian Möstl , Martin A. Reiss , Tanja Amerstorfer , Rachel L. Bailey

We present a comprehensive analysis of the three-dimensional magnetic flux rope structure generated during the Lynch et al. (2019) magnetohydrodynamic (MHD) simulation of a global-scale, 360 degree-wide streamer blowout coronal mass…

Solar and Stellar Astrophysics · Physics 2022-08-02 Benjamin Lynch , Nada Al-Haddad , Wenyuan Yu , Erika Palmerio , Noé Lugaz

Increasingly one interplanetary coronal mass ejection (ICME) structure can propagate across more than one spacecraft in the solar wind. This usually happens when two or more spacecraft are nearly radially aligned with a relatively small…

Solar and Stellar Astrophysics · Physics 2022-06-06 Qiang Hu , Wen He , Yu Chen

The Parker Solar Probe (PSP) observed an interplanetary coronal mass ejection (ICME) event during its first orbit around the sun, among many other events. This event is analyzed by applying a wavelet analysis technique to obtain the reduced…

We report on the detailed and systematic study of field-line twist and length distributions within magnetic flux ropes embedded in Interplanetary Coronal Mass Ejections (ICMEs). The Grad-Shafranov reconstruction method is utilized together…

Solar and Stellar Astrophysics · Physics 2015-09-16 Qiang Hu , Jiong Qiu , Sam Krucker

We present an analysis of the ionic composition of iron for two interplanetary coronal mass ejections observed in May 21-23 2007 by the ACE and STEREO spacecraft in the context of the magnetic structure of the ejecta flux rope, sheath…

Space Physics · Physics 2015-06-11 Alysha Reinard , Benjamin Lynch , Tamitha Mulligan

Accurate forecasts of Coronal Mass Ejection (CME) arrival times and impact geometry remain a major challenge for space-weather operations. Coronagraph-based techniques typically achieve mean absolute errors of order ten hours, while in situ…

Solar and Stellar Astrophysics · Physics 2025-12-02 Marti Masso Moreno , Carlos Arturo Perez-Alanis , P. K. Manoharan

Solar coronal mass ejections are the most energetic events in the Solar System. In their standard formation model, a magnetic flux rope builds up into a coronal mass ejection through magnetic reconnection that continually converts…

Solar and Stellar Astrophysics · Physics 2023-05-08 Tingyu Gou , Rui Liu , Astrid M. Veronig , Bin Zhuang , Ting Li , Wensi Wang , Mengjiao Xu , Yuming Wang

Interplanetary Coronal Mass Ejections (ICMEs) originate from the eruption of complex magnetic structures occurring in our star's atmosphere. Determining the general properties of ICMEs and the physical processes at the heart of their…

Solar and Stellar Astrophysics · Physics 2023-02-01 F. Regnault , A. Strugarek , M. Janvier , F. Auchère , N. Lugaz , N. Al-Haddad

We performed magnetohydrodynamic simulation of a formation process of coronal mass ejections (CMEs), focusing on interaction (reconnection) between an ejecting flux rope and its ambient field. We examined three cases with different ambient…

Solar and Stellar Astrophysics · Physics 2015-05-19 Daikou Shiota , Kanya Kusano , Takahiro Miyoshi , Kazunari Shibata

Among the current challenges in Space Weather, one of the main ones is to forecast the internal magnetic configuration within Interplanetary Coronal Mass Ejections (ICMEs). Currently, a monotonic and coherent magnetic configuration observed…

Solar and Stellar Astrophysics · Physics 2021-01-12 Luiz F. G. dos Santos , Ayris Narock , Teresa Nieves-Chinchilla , Marlon Nuñez , Michael Kirk

Interplanetary coronal mass ejections (ICMEs) are a significant feature of the heliospheric environment and the primary cause of adverse space weather at the Earth. ICME propagation, and the evolution of ICME magnetic field structure during…

Space Physics · Physics 2019-05-20 S. W. Good , E. K. J. Kilpua , A. T. LaMoury , R. J. Forsyth , J. P. Eastwood , C. Möstl

We report on a study comparing coronal flux ropes inferred from eruption data with their interplanetary counterparts constructed from in situ data. The eruption data include the source-region magnetic field, post-eruption arcades, and…

Solar and Stellar Astrophysics · Physics 2018-12-05 N. Gopalswamy , S. Akiyama , S. Yashiro , H. Xie

The Grad-Shafranov reconstruction is a method of estimating the orientation (invariant axis) and cross-section of magnetic flux ropes using the data from a single spacecraft. It can be applied to various magnetic structures such as magnetic…

Instrumentation and Methods for Astrophysics · Physics 2012-11-12 Alexey Isavnin , Emilia K. J. Kilpua , Hannu E. J. Koskinen

Understanding the properties, especially the magnetohydrodynamic (MHD) invariants, of coronal mass ejections (CMEs) measured in-situ is key to bridging the CME properties from the Sun to interplanetary space. In order to investigate CMEs…

It is generally known that multi-spacecraft observations of interplanetary coronal mass ejections (ICMEs) more clearly reveal their three-dimensional structure than do observations made by a single spacecraft. The launch of the STEREO twin…

Space Physics · Physics 2015-06-11 Tamitha Mulligan , Alysha A. Reinard , Benjamin J. Lynch

The solar wind conditions at one astronomical unit (AU) can be strongly disturbed by the interplanetary coronal mass ejections (ICMEs). A subset, called magnetic clouds (MCs), is formed by twisted flux ropes that transport an important…

Astrophysics · Physics 2009-11-13 S. Dasso , M. S. Nakwacki , P. Démoulin , C. H. Mandrini

Interplanetary coronal mass ejections (ICMEs) have low proton beta across a broad range of heliocentric distances and a magnetic flux rope structure at large scales, making them a unique environment for studying solar wind fluctuations.…

Solar and Stellar Astrophysics · Physics 2023-10-17 S. W. Good , O. K. Rantala , A. -S. M. Jylhä , C. H. K. Chen , C. Möstl , E. K. J. Kilpua

We present a major update to the 3D coronal rope ejection (3DCORE) technique for modeling coronal mass ejection flux ropes in conjunction with an Approximate Bayesian Computation (ABC) algorithm that is used for fitting the model to in situ…

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