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We developed a code for the reconstruction of nonlinear force-free and non-force-free coronal magnetic fields. The 3D magnetic field is computed numerically with the help of an optimization principle. The force-free and non-force-free codes…

天体物理学 · 物理学 2009-06-25 T. Wiegelmann

A sample of isolated Earth-impacting ICMEs that occurred in the period January 2008 to August 2014 is analysed in order to study in detail the ICME in situ signatures with respect to the type of filament eruption related to the…

Coronal Mass Ejections (CMEs) are energetic storms in the Sun that result in the ejection of large-scale magnetic clouds (MCs) in interplanetary space that contain enhanced magnetic fields with coherently changing field direction. The…

太阳与恒星天体物理 · 物理学 2022-11-09 Sanchita Pal , Dibyendu Nandy , Emilia K J Kilpua

Interplanetary coronal mass ejections (ICMEs) have complex magnetic and density structures, which is the result of their interaction with the structured solar wind and with previous eruptions. ICMEs are revealed by in situ measurements and…

太阳与恒星天体物理 · 物理学 2011-06-06 N. Lugaz , I. I. Roussev

We report on a numerical investigation of two coronal mass ejections (CMEs) which interact as they propagate in the inner heliosphere. We focus on the effect of the orientation of the CMEs relative to each other by performing four different…

空间物理 · 物理学 2015-06-17 N. Lugaz , C. J. Farrugia , W. B. Manchester , N. Schwadron

Large magnetic structures are launched away from the Sun during solar eruptions. They are observed as (interplanetary) coronal mass ejections (ICMEs or CMEs) with coronal and heliospheric imagers. A fraction of them are observed insitu as…

太阳与恒星天体物理 · 物理学 2020-07-01 P. Démoulin , S. Dasso , V. Lanabere , M. Janvier , C. Noûs

Coronal Mass Ejections (CMEs) are the main drivers of the disturbances in interplanetary space. Understanding the CME interior magnetic structure is crucial for advancing space weather studies. Assessing the capabilities of a numerical…

太阳与恒星天体物理 · 物理学 2024-09-11 Tinatin Baratashvili , Benjamin Grison , Brigitte Schmieder , Pascal Demoulin , Stefaan Poedts

We use magnetic field measurements by the Juno spacecraft to catalog and investigate interplanetary coronal mass ejections (ICMEs) beyond 1 AU. During its cruise phase, Juno spent about 5 years in the solar wind between 2011 September and…

空间物理 · 物理学 2021-12-22 Emma E. Davies , Robert J. Forsyth , Réka M. Winslow , Christian Möstl , Noé Lugaz

3D picture of the coronal magnetic field remains an outstanding problem in solar physics, particularly, in active regions. Nonlinear force-free field reconstructions that employ routinely available full-disk photospheric vector magnetograms…

太阳与恒星天体物理 · 物理学 2019-01-23 Gregory Fleishman , Ivan Mysh'yakov , Alexey Stupishin , Maria Loukitcheva , Sergey Anfinogentov

We present a 3-D morphological and field reconstruction of a coronal mass ejection (CME) from 2023 November 28, which hits three spacecraft near 1 au: Wind at Earth's L1 Lagrange point; STEREO-A with a longitudinal separation of…

太阳与恒星天体物理 · 物理学 2025-03-07 Brian E. Wood , Phillip Hess

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…

太阳与恒星天体物理 · 物理学 2022-08-02 Benjamin Lynch , Nada Al-Haddad , Wenyuan Yu , Erika Palmerio , Noé Lugaz

Coronal mass ejections (CMEs) are magnetized plasma systems with highly complex magnetic topology and evolution. Methods developed to assess their magnetic configuration have primarily focused on reconstructing three-dimensional…

空间物理 · 物理学 2024-08-09 Nada Al-Haddad , Mitchell Berger

The relative importance of different initiation mechanisms for coronal mass ejections (CMEs) on the Sun is uncertain. One possible mechanism is the loss of equilibrium of coronal magnetic flux ropes formed gradually by large-scale surface…

太阳与恒星天体物理 · 物理学 2014-11-20 A. R. Yeates , G. D. R. Attrill , Dibyendu Nandy , D. H. Mackay , P. C. H. Martens , A. A. van Ballegooijen

We perform a numerical study of the evolution of a Coronal Mass Ejection (CME) and its interaction with the coronal magnetic field based on the May 12, 1997, CME event using a global MagnetoHydroDynamic (MHD) model for the solar corona. The…

太阳与恒星天体物理 · 物理学 2015-05-19 O. Cohen , G. D. R. Attrill , N. A. Schwadron , N. U. Crooker , M. J. Owens , C. Downs , T. I. Gombosi

In-situ measurements carried out by spacecraft in radial alignment are critical to advance our knowledge on the evolutionary behavior of coronal mass ejections (CMEs) and their magnetic structures during propagation through interplanetary…

太阳与恒星天体物理 · 物理学 2021-08-11 Camilla Scolini , Reka M. Winslow , Noé Lugaz , Stefaan Poedts

We present a hybrid combination of forward and inverse reconstruction methods using multiple observations of a coronal mass ejection (CME) to derive the 3D 'true' Height-Time plots for individual CME components. We apply this hybrid method…

太阳与恒星天体物理 · 物理学 2015-05-13 Alex Antunes , Arnaud Thernisien , Amos Yahil

We present a new approach to combine remote observations and in situ data by STEREO/HI and Wind, respectively, to derive the kinematics and propagation directions of interplanetary coronal mass ejections (ICMEs). We used two methods,…

太阳与恒星天体物理 · 物理学 2012-02-07 T. Rollett , C. Möstl , M. Temmer , A. M. Veronig , C. J. Farrugia , H. K. Biernat

We present an automated pipeline for operational short-term forecasting of coronal mass ejection (CME) magnetic field structure at L1, coupling arrival time prediction, in situ detection, and iterative flux rope reconstruction, following…

Predicting the impacts of coronal mass ejections (CMEs) is a major focus of current space weather forecasting efforts. Typically, CME properties are reconstructed from stereoscopic coronal images and then used to forward model a CME's…

太阳与恒星天体物理 · 物理学 2024-04-05 C. Kay , E. Palmerio

This study investigates the modulation of particle fluxes at the Earths surface influenced by the intensity and orientation of the Interplanetary magnetic field (IMF) carried by the Coronal Mass Ejecta (ICME). We examine how IMF and its Bz…

空间物理 · 物理学 2024-06-25 A. Chilingarian , T. Karapetyan , B. Sargsyan , K. Asatryan , G. Gabaryan