Ranadeep Sarkar
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View article: Modeling the Magnetic Vectors of Interplanetary Coronal Mass Ejections at Different Heliocentric Distances with INFROS
Modeling the Magnetic Vectors of Interplanetary Coronal Mass Ejections at Different Heliocentric Distances with INFROS Open
The INterplanetary Flux ROpe Simulator (INFROS) is an observationally constrained analytical model dedicated to forecasting the strength of the southward component ( Bz ) of the magnetic field embedded in interplanetary coronal mass ejecti…
View article: Evolution of reconnection flux during eruption of magnetic flux ropes
Evolution of reconnection flux during eruption of magnetic flux ropes Open
Coronal mass ejections (CMEs) are powerful drivers of space weather, with magnetic flux ropes (MFRs) widely regarded as their primary precursors. However, the variation in reconnection flux during the evolution of MFR during CME eruptions …
View article: Validation of EUHFORIA cone and spheromak coronal mass ejection models
Validation of EUHFORIA cone and spheromak coronal mass ejection models Open
Aims. We present validation results for calculations of arrival times and geomagnetic impact of coronal mass ejections (CMEs) using the cone and spheromak CME models implemented in EUropean Heliospheric FORecasting Information Asset (EUHFO…
View article: Modelling the magnetic vectors of ICMEs at different heliocentric distances with INFROS
Modelling the magnetic vectors of ICMEs at different heliocentric distances with INFROS Open
The INterplanetary Flux ROpe Simulator (INFROS) is an observationally constrained analytical model dedicated for forecasting the strength of the southward component (Bz) of the magnetic field embedded in interplanetary coronal mass ejectio…
View article: Validation of EUHFORIA cone and spheromak Coronal Mass Ejection Models
Validation of EUHFORIA cone and spheromak Coronal Mass Ejection Models Open
Aims. We present the validation results for arrival times and geomagnetic impact of Coronal Mass Ejections (CMEs), using the cone and spheromak CME models implemented in EUropean Heliospheric FORecasting Information Asset (EUHFORIA). Valid…
View article: Integration of a Novel Flux Rope Model into Global MHD Simulations for Analyzing the Space Weather Effects of Coronal Mass Ejections
Integration of a Novel Flux Rope Model into Global MHD Simulations for Analyzing the Space Weather Effects of Coronal Mass Ejections Open
One of the major challenges in space weather forecasting is to reliably predict the magnetic structure of interplanetary coronal mass ejections (ICMEs) in the near-Earth space. In the framework of global MHD modelling, several efforts…
View article: Changes in Photospheric Lorentz Force in Eruptive and Confined Solar Flares
Changes in Photospheric Lorentz Force in Eruptive and Confined Solar Flares Open
Solar flares are known to leave imprints on the magnetic field at the photosphere, often manifested as an abrupt and permanent change in the downward-directed Lorentz force in localized areas inside the active region. Our study aims to dif…
View article: Identifying and Tracking Solar Flux Ropes in Simulation Data and Deflection Analysis of AR11176 and AR12473 Flux Ropes
Identifying and Tracking Solar Flux Ropes in Simulation Data and Deflection Analysis of AR11176 and AR12473 Flux Ropes Open
To improve our understanding of how space weather affects our near-Earth space environment, magnetic field modelling of solar eruptive structures is essential. In particular, modelling flux ropes in a time-dependent manner to investigate t…
View article: Changes in Photospheric Lorentz Force in Eruptive and Confined Solar Flares
Changes in Photospheric Lorentz Force in Eruptive and Confined Solar Flares Open
Solar flares are known to leave imprints on the magnetic field in the photosphere, often manifested as an abrupt and permanent change in the downward-directed Lorentz force in localized areas inside the active region. Our study aims to dif…
View article: Studying the Spheromak Rotation in Data-constrained Coronal Mass Ejection Modeling with EUHFORIA and Assessing Its Effect on the B <sub> z </sub> Prediction
Studying the Spheromak Rotation in Data-constrained Coronal Mass Ejection Modeling with EUHFORIA and Assessing Its Effect on the B <sub> z </sub> Prediction Open
A key challenge in space weather forecasting is accurately predicting the magnetic field topology of interplanetary coronal mass ejections (ICMEs), specifically the north–south magnetic field component ( B z ) for Earth-directed CMEs. Heli…
View article: The automatic identification and tracking of coronal flux ropes
The automatic identification and tracking of coronal flux ropes Open
Context. Constructing the relevant magnetic field lines from active region modelling data is crucial to understanding the underlying instability mechanisms that trigger the corresponding eruptions. Aims. We present a magnetic flux rope (FR…
View article: Photospheric Lorentz force changes in eruptive and confined solar flares
Photospheric Lorentz force changes in eruptive and confined solar flares Open
Solar flares are known to leave imprints on the magnetic field at the photosphere, often manifested as an abrupt and permanent change in the downward-directed Lorentz force in localized areas inside the active region. Our study aims to dif…
View article: The Automatic Identification and Tracking of Coronal Flux Ropes -- Part II: New Mathematical Morphology-based Flux Rope Extraction Method and Deflection Analysis
The Automatic Identification and Tracking of Coronal Flux Ropes -- Part II: New Mathematical Morphology-based Flux Rope Extraction Method and Deflection Analysis Open
We present a magnetic flux rope (FR) extraction tool for solar coronal magnetic field modelling data, which builds upon the methodology from Wagner et al. (2023). We apply the scheme to magnetic field simulations of active regions AR12473 …
View article: Studying the spheromak rotation in data-constrained CME modelling with EUHFORIA and assessing its effect on the Bz prediction
Studying the spheromak rotation in data-constrained CME modelling with EUHFORIA and assessing its effect on the Bz prediction Open
A key challenge in space weather forecasting is accurately predicting the magnetic field topology of interplanetary coronal mass ejections (ICMEs), specifically the north-south magnetic field component (Bz) for Earth-directed CMEs. Heliosp…
View article: Enabling Discoveries in Heliospheric Science through Laboratory Plasma Experiments
Enabling Discoveries in Heliospheric Science through Laboratory Plasma Experiments Open
Resolving 3D physics occurring on multiple spatial and temporal scales is difficult with spacecraft and computer simulations alone, but can sometimes be studied much more easily with laboratory plasma experiments. This white paper proposes…
View article: Next Generation Machine to Study Heliophysics in the Laboratory
Next Generation Machine to Study Heliophysics in the Laboratory Open
Whitepaper #099 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: basic research; infrastructure/workforce/other programmatic. Additional topics: ground-based missions/projects; laboratory space plasm…
View article: The automatic identification and tracking of coronal flux ropes
The automatic identification and tracking of coronal flux ropes Open
Context. Investigating the early-stage evolution of an erupting flux rope from the Sun is important for understanding the mechanisms of how it loses its stability and its space-weather impact. Aims. Our aim is to develop an efficient schem…
View article: The Automatic Identification and Tracking of Coronal Flux Ropes -- Part I: Footpoints and Fluxes
The Automatic Identification and Tracking of Coronal Flux Ropes -- Part I: Footpoints and Fluxes Open
Investigating the early-stage evolution of an erupting flux rope from the Sun is important to understand the mechanisms of how it looses its stability and its space weather impacts. Our aim is to develop an efficient scheme for tracking th…
View article: Implementing a toroidal flux rope model in EUHFORIA and assessing its performance in predicting CME magnetic-field at 1 AU
Implementing a toroidal flux rope model in EUHFORIA and assessing its performance in predicting CME magnetic-field at 1 AU Open
One of the major challenges in space weather forecasting is to reliably predict the magnetic structure of interplanetary coronal mass ejections (ICMEs) in the near-Earth space. In the framework of global MHD modelling, several efforts have…
View article: Tracking the evolution of spheromak flux ropes in ambient interplanetary magnetic field and plasma environments.
Tracking the evolution of spheromak flux ropes in ambient interplanetary magnetic field and plasma environments. Open
Interplanetary magnetic clouds with flux rope structures are an essential ingredient of space weather models. The main aim is to reconstruct their magnetic field topology and plasma properties and track their evolution in space and time. T…
View article: Investigating Flux Rope Eruptivity via Time-dependent Data-driven Modelling
Investigating Flux Rope Eruptivity via Time-dependent Data-driven Modelling Open
Data-driven coronal models are attracting increasing attention for their ability to accurately capture the pre-eruption magnetic field configuration of active regions. However, the degree to which the current modelling techniques are able …
View article: Magnetohydrodynamics evolution of three-dimensional magnetic null in NOAA active region 11515 initiated using non-force-free field extrapolation
Magnetohydrodynamics evolution of three-dimensional magnetic null in NOAA active region 11515 initiated using non-force-free field extrapolation Open
Magnetohydrodynamics simulation of active region NOAA 11515 is performed to examine the initiation of the M5.6 flaring event that starts around 10:43 UT on 2 July 2012. The simulation is conducted using an extrapolated non-force-free magne…
View article: Studying the spheromak rotation for realistic CME modelling with EUHFORIA and its dependency on initial model parameters&#160;
Studying the spheromak rotation for realistic CME modelling with EUHFORIA and its dependency on initial model parameters  Open
<p>Coronal mass ejections (CMEs) are one of the major sources for space weather disturbances. If the magnetic field inside an Earth-directed CME, or its associated sheath region, has a southward-directed north-sou…
View article: Data-driven modelling of the evolution of CME properties in the low-corona: AR12473
Data-driven modelling of the evolution of CME properties in the low-corona: AR12473 Open
<p>To better predict the impacts of solar eruptions on Earth, understanding the low-corona evolution of CMEs is crucial because this influential early phase is highly dynamic. We therefore investigate the evolution of CME properties,…
View article: Estimating the Magnetic Structure of an Erupting CME Flux Rope From AR12158 Using Data-Driven Modeling
Estimating the Magnetic Structure of an Erupting CME Flux Rope From AR12158 Using Data-Driven Modeling Open
We investigate here the magnetic properties of a large-scale magnetic flux rope related to a coronal mass ejection (CME) that erupted from the Sun on September 12, 2014 and produced a well-defined flux rope in interplanetary space on Septe…
View article: Modeling the magnetic structure of CMEs in the inner heliosphere based on data-driven time-dependent simulations of active region evolution
Modeling the magnetic structure of CMEs in the inner heliosphere based on data-driven time-dependent simulations of active region evolution Open
<p>Characterizing the detailed structure of the magnetic field in the active corona is of crucial importance for determining the chain of events from the formation to the destabilisation and subsequent eruption and propagation of cor…
View article: On the prediction of magnetic field vectors of ICME using data constrained simulation with EUHFORIA
On the prediction of magnetic field vectors of ICME using data constrained simulation with EUHFORIA Open
<p>Coronal mass ejections (CMEs), the most violent eruptive phenomena occurring in the heliosphere, erupt in the form of gigantic clouds of magnetized plasma from the Sun and can reach Earth within several hours to days. If the magne…
View article: EUropean Heliospheric FORecasting Information Asset 2.0
EUropean Heliospheric FORecasting Information Asset 2.0 Open
Aims : This paper presents a H2020 project aimed at developing an advanced space weather forecasting tool, combining the MagnetoHydroDynamic (MHD) solar wind and coronal mass ejection (CME) evolution modelling with solar energetic particle…
View article: Evolution of the Coronal Cavity From the Quiescent to Eruptive Phase Associated with Coronal Mass Ejection
Evolution of the Coronal Cavity From the Quiescent to Eruptive Phase Associated with Coronal Mass Ejection Open
We present the evolution of a coronal cavity encompassing its quiescent and eruptive phases in the lower corona. Using multiple vantage-point observations from the SDO /AIA, STEREO SECCHI/EUVI, and PROBA2 /Sun Watcher with the APS and Imag…
View article: Evolution of Coronal Cavity from Quiescent to Eruptive Phase in Association with Coronal Mass Ejection
Evolution of Coronal Cavity from Quiescent to Eruptive Phase in Association with Coronal Mass Ejection Open
We present the evolution of a coronal cavity encompassing its quiescent and eruptive phases in the lower corona. Using the multi-vantage point observations from the SDO/AIA, STEREO SECCHI/EUVI and PROBA2/SWAP EUV imagers, we capture the se…