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Deciphering the evolution of thermodynamic properties and their connection to the global kinematics of high-speed coronal mass ejections using FRIS model

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dc.contributor.author Khuntia, Soumyaranjan
dc.contributor.author Mishra, Wageesh
dc.contributor.author Wang, Yuming
dc.contributor.author Mishra, S. K
dc.contributor.author Nieves-Chinchilla, Teresa
dc.contributor.author Lyu, Shaoyu
dc.date.accessioned 2024-12-17T06:12:00Z
dc.date.available 2024-12-17T06:12:00Z
dc.date.issued 2024-12
dc.identifier.citation Monthly Notices of the Royal Astronomical Society, Vol. 535, No. 3, pp. 2585-2597 en_US
dc.identifier.issn 0035-8711
dc.identifier.uri http://hdl.handle.net/2248/8614
dc.description Open Access en_US
dc.description This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited
dc.description.abstract Most earlier studies have been limited to estimating the kinematic evolution of coronal mass ejections (CMEs), and only limited efforts have been made to investigate their thermodynamic evolution. We focus on the interplay of the thermal properties of CMEs with their observed global kinematics. We implement the Flux rope Internal State model to estimate variations in the polytropic index, heating rate per unit mass, temperature, pressure, and various internal forces. The model incorporates inputs of 3D kinematics obtained from the Graduated Cylindrical Shell (GCS) model. In our study, we chose nine fast-speed CMEs from 2010 to 2012. Our investigation elucidates that the selected fast-speed CMEs show a heat-release phase at the beginning, followed by a heat-absorption phase with a near-isothermal state in their later propagation phase. The thermal state transition, from heat release to heat absorption, occurs at around 3( ± 0.3) to 7(± 0.7) R ⊙ for different CMEs. We found that the CMEs with higher expansion speeds experience a less pronounced sharp temperature decrease before gaining a near-isothermal state. The differential emission measurement (DEM) analysis findings, using multiwavelength observation from Solar Dynamics Observatory/Atmospheric Imaging Assembly, also show a heat release state of CMEs at lower coronal heights. We also find the dominant internal forces influencing CME radial expansion at varying distances from the Sun. Our study shows the need to characterize the internal thermodynamic properties of CMEs better in both observational and modeling studies, offering insights for refining assumptions of a constant value of the polytropic index during the evolution of CMEs. en_US
dc.language.iso en en_US
dc.publisher Oxford University Press on behalf of Royal Astronomical Society en_US
dc.relation.uri https://doi.org/10.1093/mnras/stae2523
dc.rights © 2024 The Author(s)
dc.subject Sun: corona en_US
dc.subject Sun: coronal mass ejections (CMEs) en_US
dc.subject Sun: heliosphere en_US
dc.title Deciphering the evolution of thermodynamic properties and their connection to the global kinematics of high-speed coronal mass ejections using FRIS model en_US
dc.type Article en_US


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